From the AGA Journals

For patients with Barrett’s esophagus, surveillance endoscopy detects high-grade dysplasia (HGD) and esophageal adenocarcinoma (EAC) more often than previously reported, according to a retrospective analysis of more than 1,000 patients.

Neoplasia detection rate, defined as findings on initial surveillance endoscopy, was also lower than that observed in past studies, according to lead author Lovekirat Dhaliwal, MBBS, of Mayo Clinic, Rochester, Minn., and colleagues.

This study’s findings may help define quality control benchmarks for endoscopic surveillance of Barrett’s esophagus, the investigators wrote in Clinical Gastroenterology and Hepatology. Accurate metrics are needed, they noted, because almost 9 out of 10 patients with Barrett’s esophagus present with EAC outside of a surveillance program, which “may represent missed opportunities at screening.” At the same time, a previous study by the investigators and one from another group, have suggested that 25%-33% of HGD/EAC cases may go undetected by initial surveillance endoscopy.

“Dysplasia detection in [Barrett’s esophagus] is challenging because of its patchy distribution and often subtle appearance,” the investigators noted. “Lack of compliance with recommended biopsy guidelines is also well-documented.”

On the other hand, Dr. Dhaliwal and colleagues suggested that previous studies may not accurately portray community practice and, therefore, have limited value in determining quality control metrics. A 2019 review, for instance, reported a neoplasia detection rate of 7% among patients with Barrett’s esophagus, but this finding “is composed of data from largely referral center cohorts with endoscopy performed by experienced academic gastroenterologists,” they wrote, which may lead to overestimation of such detection.

To better characterize this landscape, the investigators conducted a retrospective analysis involving 1,066 patients with Barrett’s esophagus who underwent initial surveillance endoscopy between 1991 and 2019. Approximately three out of four surveillance endoscopies (77%) were performed by gastroenterologists, while the remaining were performed by nongastroenterologists, such as family practitioners or surgeons. About 60% of patients were adequately biopsied according to the Seattle protocol.

Analysis revealed that the neoplasia detection rate was 4.9% (95% confidence interval, 3.8%-6.4%), which is less than the previously reported rate of 7%. HGD was more common than EAC (33 cases vs. 20 cases). Out of 1,066 patients, 391 without neoplasia on initial endoscopy underwent repeat endoscopy within a year. Among these individuals, HGD or EAC was detected in eight patients, which suggests that 13% of diagnoses were missed on initial endoscopy, a rate well below the previously reported range of 25%-33%.
 

Technology challenged by technique

The neoplasia detection rate “appeared to increase significantly from 1991 to 2019 on univariate analysis (particularly after 2000), but this was not observed on multivariate analysis,” the investigators wrote. “This was despite the introduction of high definition monitors and high resolution endoscopes in subsequent years.

“This may suggest that in a low dysplasia prevalence setting, basic techniques such as careful white light inspection of the [Barrett’s esophagus] mucosa along with targeted and Seattle protocol biopsies may be more important,” they noted.

The importance of technique may be further supported by another finding: Gastroenterologists detected neoplasia almost four times as often as did nongastroenterologists (odds ratio, 3.6; P = .0154).

“This finding is novel and may be due to additional training in endoscopy, lesion recognition, and familiarity with surveillance guidelines in gastroenterologists,” the investigators wrote. “If this finding is replicated in other cohorts, it may support recommendations for the performance of surveillance by endoscopists trained in gastrointestinal endoscopy and well-versed in surveillance guidelines.

“[U]sing neoplasia detection as a quality metric coupled with outcome measures such as missed dysplasia rates could improve adherence to established biopsy protocols and improve the quality of care to patients,” they wrote. “Ultimately, this can be an opportunity to develop a high-value, evidence-based quality metric in [Barrett’s esophagus] surveillance.”

The authors acknowledged some limitations to their study. Its retrospective design meant no one biopsy protocol could be adopted across the entire study period; however, the results were “unchanged” when restricted to the period after introduction of the Seattle protocol in 2000. The study’s long period could have left results susceptible to changing guidelines, but the neoplasia detection rates remained relatively stable over time.

“Because prior reports consisted largely of tertiary care center cohorts, our findings may reflect the absence of referral bias and be more generalizable,” the investigators wrote.

The study was funded by the National Institute of Aging and the National Cancer Institute. The investigators disclosed relationships with Celgene, Nine Point Medical, Takeda, and others.

For patients with Barrett’s esophagus, surveillance endoscopy detects high-grade dysplasia (HGD) and esophageal adenocarcinoma (EAC) more often than previously reported, according to a retrospective analysis of more than 1,000 patients.

Neoplasia detection rate, defined as findings on initial surveillance endoscopy, was also lower than that observed in past studies, according to lead author Lovekirat Dhaliwal, MBBS, of Mayo Clinic, Rochester, Minn., and colleagues.

This study’s findings may help define quality control benchmarks for endoscopic surveillance of Barrett’s esophagus, the investigators wrote in Clinical Gastroenterology and Hepatology. Accurate metrics are needed, they noted, because almost 9 out of 10 patients with Barrett’s esophagus present with EAC outside of a surveillance program, which “may represent missed opportunities at screening.” At the same time, a previous study by the investigators and one from another group, have suggested that 25%-33% of HGD/EAC cases may go undetected by initial surveillance endoscopy.

“Dysplasia detection in [Barrett’s esophagus] is challenging because of its patchy distribution and often subtle appearance,” the investigators noted. “Lack of compliance with recommended biopsy guidelines is also well-documented.”

On the other hand, Dr. Dhaliwal and colleagues suggested that previous studies may not accurately portray community practice and, therefore, have limited value in determining quality control metrics. A 2019 review, for instance, reported a neoplasia detection rate of 7% among patients with Barrett’s esophagus, but this finding “is composed of data from largely referral center cohorts with endoscopy performed by experienced academic gastroenterologists,” they wrote, which may lead to overestimation of such detection.

To better characterize this landscape, the investigators conducted a retrospective analysis involving 1,066 patients with Barrett’s esophagus who underwent initial surveillance endoscopy between 1991 and 2019. Approximately three out of four surveillance endoscopies (77%) were performed by gastroenterologists, while the remaining were performed by nongastroenterologists, such as family practitioners or surgeons. About 60% of patients were adequately biopsied according to the Seattle protocol.

Analysis revealed that the neoplasia detection rate was 4.9% (95% confidence interval, 3.8%-6.4%), which is less than the previously reported rate of 7%. HGD was more common than EAC (33 cases vs. 20 cases). Out of 1,066 patients, 391 without neoplasia on initial endoscopy underwent repeat endoscopy within a year. Among these individuals, HGD or EAC was detected in eight patients, which suggests that 13% of diagnoses were missed on initial endoscopy, a rate well below the previously reported range of 25%-33%.
 

Technology challenged by technique

The neoplasia detection rate “appeared to increase significantly from 1991 to 2019 on univariate analysis (particularly after 2000), but this was not observed on multivariate analysis,” the investigators wrote. “This was despite the introduction of high definition monitors and high resolution endoscopes in subsequent years.

“This may suggest that in a low dysplasia prevalence setting, basic techniques such as careful white light inspection of the [Barrett’s esophagus] mucosa along with targeted and Seattle protocol biopsies may be more important,” they noted.

The importance of technique may be further supported by another finding: Gastroenterologists detected neoplasia almost four times as often as did nongastroenterologists (odds ratio, 3.6; P = .0154).

“This finding is novel and may be due to additional training in endoscopy, lesion recognition, and familiarity with surveillance guidelines in gastroenterologists,” the investigators wrote. “If this finding is replicated in other cohorts, it may support recommendations for the performance of surveillance by endoscopists trained in gastrointestinal endoscopy and well-versed in surveillance guidelines.

“[U]sing neoplasia detection as a quality metric coupled with outcome measures such as missed dysplasia rates could improve adherence to established biopsy protocols and improve the quality of care to patients,” they wrote. “Ultimately, this can be an opportunity to develop a high-value, evidence-based quality metric in [Barrett’s esophagus] surveillance.”

The authors acknowledged some limitations to their study. Its retrospective design meant no one biopsy protocol could be adopted across the entire study period; however, the results were “unchanged” when restricted to the period after introduction of the Seattle protocol in 2000. The study’s long period could have left results susceptible to changing guidelines, but the neoplasia detection rates remained relatively stable over time.

“Because prior reports consisted largely of tertiary care center cohorts, our findings may reflect the absence of referral bias and be more generalizable,” the investigators wrote.

The study was funded by the National Institute of Aging and the National Cancer Institute. The investigators disclosed relationships with Celgene, Nine Point Medical, Takeda, and others.

For patients with Barrett’s esophagus, surveillance endoscopy detects high-grade dysplasia (HGD) and esophageal adenocarcinoma (EAC) more often than previously reported, according to a retrospective analysis of more than 1,000 patients.

Neoplasia detection rate, defined as findings on initial surveillance endoscopy, was also lower than that observed in past studies, according to lead author Lovekirat Dhaliwal, MBBS, of Mayo Clinic, Rochester, Minn., and colleagues.

This study’s findings may help define quality control benchmarks for endoscopic surveillance of Barrett’s esophagus, the investigators wrote in Clinical Gastroenterology and Hepatology. Accurate metrics are needed, they noted, because almost 9 out of 10 patients with Barrett’s esophagus present with EAC outside of a surveillance program, which “may represent missed opportunities at screening.” At the same time, a previous study by the investigators and one from another group, have suggested that 25%-33% of HGD/EAC cases may go undetected by initial surveillance endoscopy.

“Dysplasia detection in [Barrett’s esophagus] is challenging because of its patchy distribution and often subtle appearance,” the investigators noted. “Lack of compliance with recommended biopsy guidelines is also well-documented.”

On the other hand, Dr. Dhaliwal and colleagues suggested that previous studies may not accurately portray community practice and, therefore, have limited value in determining quality control metrics. A 2019 review, for instance, reported a neoplasia detection rate of 7% among patients with Barrett’s esophagus, but this finding “is composed of data from largely referral center cohorts with endoscopy performed by experienced academic gastroenterologists,” they wrote, which may lead to overestimation of such detection.

To better characterize this landscape, the investigators conducted a retrospective analysis involving 1,066 patients with Barrett’s esophagus who underwent initial surveillance endoscopy between 1991 and 2019. Approximately three out of four surveillance endoscopies (77%) were performed by gastroenterologists, while the remaining were performed by nongastroenterologists, such as family practitioners or surgeons. About 60% of patients were adequately biopsied according to the Seattle protocol.

Analysis revealed that the neoplasia detection rate was 4.9% (95% confidence interval, 3.8%-6.4%), which is less than the previously reported rate of 7%. HGD was more common than EAC (33 cases vs. 20 cases). Out of 1,066 patients, 391 without neoplasia on initial endoscopy underwent repeat endoscopy within a year. Among these individuals, HGD or EAC was detected in eight patients, which suggests that 13% of diagnoses were missed on initial endoscopy, a rate well below the previously reported range of 25%-33%.
 

Technology challenged by technique

The neoplasia detection rate “appeared to increase significantly from 1991 to 2019 on univariate analysis (particularly after 2000), but this was not observed on multivariate analysis,” the investigators wrote. “This was despite the introduction of high definition monitors and high resolution endoscopes in subsequent years.

“This may suggest that in a low dysplasia prevalence setting, basic techniques such as careful white light inspection of the [Barrett’s esophagus] mucosa along with targeted and Seattle protocol biopsies may be more important,” they noted.

The importance of technique may be further supported by another finding: Gastroenterologists detected neoplasia almost four times as often as did nongastroenterologists (odds ratio, 3.6; P = .0154).

“This finding is novel and may be due to additional training in endoscopy, lesion recognition, and familiarity with surveillance guidelines in gastroenterologists,” the investigators wrote. “If this finding is replicated in other cohorts, it may support recommendations for the performance of surveillance by endoscopists trained in gastrointestinal endoscopy and well-versed in surveillance guidelines.

“[U]sing neoplasia detection as a quality metric coupled with outcome measures such as missed dysplasia rates could improve adherence to established biopsy protocols and improve the quality of care to patients,” they wrote. “Ultimately, this can be an opportunity to develop a high-value, evidence-based quality metric in [Barrett’s esophagus] surveillance.”

The authors acknowledged some limitations to their study. Its retrospective design meant no one biopsy protocol could be adopted across the entire study period; however, the results were “unchanged” when restricted to the period after introduction of the Seattle protocol in 2000. The study’s long period could have left results susceptible to changing guidelines, but the neoplasia detection rates remained relatively stable over time.

“Because prior reports consisted largely of tertiary care center cohorts, our findings may reflect the absence of referral bias and be more generalizable,” the investigators wrote.

The study was funded by the National Institute of Aging and the National Cancer Institute. The investigators disclosed relationships with Celgene, Nine Point Medical, Takeda, and others.

Among patients with nonalcoholic fatty liver disease (NAFLD) and compensated advanced chronic liver disease, liver stiffness measurements (LSMs) are associated with risks of hepatic events, according to a retrospective analysis of more than 1,000 patients.

“[N]oninvasive markers that can predict liver disease severity and outcomes in patients with NAFLD and advanced fibrosis are a major unmet need,” wrote lead author Salvatore Petta, MD, of the University of Palermo, Italy, and colleagues. Their report is in Clinical Gastroenterology and Hepatology. “Data about the accuracy of LSM in the prediction of events in NAFLD, and especially in patients with NAFLD and F3-F4 fibrosis, are scarce.”

To address this knowledge gap, the investigators retrospectively analyzed data from 1,039 consecutive patients with NAFLD who had baseline LSMs of more than 10 kPa and/or histologically diagnosed F3-F4 fibrosis. Patients were prospectively recruited at 10 centers in 6 countries, then followed for a median of 35 months, ranging from 19 to 63 months.

All patients had their liver stiffness measured with an M or XL probe at baseline. In addition, approximately half of the patients (n = 533) had a follow-up measurement using the same method, generating a subgroup with changes in liver stiffness. “Improved” liver stiffness was defined as a decrease in LSM greater than 20% from baseline, “impaired” liver stiffness was defined as an increase in LSM greater than 20% from baseline, and “stable” liver stiffness was defined as a change falling between 20% lower and 20% higher than baseline.

At baseline, mean LSM was 17.6 kPa. Cox regression analysis revealed that baseline LSM was independently associated with HCC (hazard ratio, 1.03; 95% confidence interval, 1.00-1.04; P = .003), liver decompensation (HR, 1.03; 95% CI, 1.02-1.04; P < .001), and liver-related death (HR, 1.02; 95% CI, 1.00-1.03; P = .005), but not extrahepatic events.

According to the investigators, the association between LSM at baseline and risk of liver decompensation was maintained after adjustment for the severity of liver disease and for surrogate markers of portal hypertension, they noted. Furthermore, patients with a baseline LSM of at least 21 kPa – which indicates high risk of clinically significant portal hypertension (CSPH) – were at greater risk of liver decompensation than were those with an LSM less than 21 kPa (HR, 3.71; 95% CI, 1.89-6.78; P = .04).

In the subgroup with follow-up measurements, approximately half of the patients had an improved LSM (53.3%), while 27.2% had a stable LSM, and 19.5% had an impaired LSM, a pattern that was significantly associated with diabetes at baseline (P = .01).

“These data agree with the available literature identifying diabetes as a risk factor for liver disease progression and liver-related complications,” the investigators wrote.

Cox regression showed that, among those with follow-up LSM, changes in LSM were independently associated with HCC (HR, 1.72; 95% CI, 1.01-3.02; P = .04), liver decompensation (HR, 1.56; 95% CI, 1.05-2.51; P = . 04), liver-related mortality (HR, 1.96; 95% CI, 1.10-3.38; P = .02), and mortality of any cause (HR, 1.73; 95% CI, 1.11-2.69; P = .01).

These risks could be further stratified by level of change in liver stiffness, with greater impairment predicting greater risk: The crude rate of liver decompensation was 14.4% among those with impaired LSM, compared with 6.2% among those with stable LSM and 3.8% among those with LSM improvement. That said, the categories of changes in LSM were not predictive of decompensation among patients with high risk of CSPH at baseline; however, they remained predictive among those with low risk of CSPH at baseline.

“[T]his study … showed that an integrated assessment of baseline LSM or [changes in LSM] can help in stratifying the risk of development of liver-related complications and of both hepatic and overall mortality,” the investigators concluded. “These data, if further validated, could help personalize prognosis and follow-up in NAFLD with [compensated advanced chronic liver disease].”

The investigators disclosed relationships with AbbVie, Novo Nordisk, Gilead, and others.

Among patients with nonalcoholic fatty liver disease (NAFLD) and compensated advanced chronic liver disease, liver stiffness measurements (LSMs) are associated with risks of hepatic events, according to a retrospective analysis of more than 1,000 patients.

“[N]oninvasive markers that can predict liver disease severity and outcomes in patients with NAFLD and advanced fibrosis are a major unmet need,” wrote lead author Salvatore Petta, MD, of the University of Palermo, Italy, and colleagues. Their report is in Clinical Gastroenterology and Hepatology. “Data about the accuracy of LSM in the prediction of events in NAFLD, and especially in patients with NAFLD and F3-F4 fibrosis, are scarce.”

To address this knowledge gap, the investigators retrospectively analyzed data from 1,039 consecutive patients with NAFLD who had baseline LSMs of more than 10 kPa and/or histologically diagnosed F3-F4 fibrosis. Patients were prospectively recruited at 10 centers in 6 countries, then followed for a median of 35 months, ranging from 19 to 63 months.

All patients had their liver stiffness measured with an M or XL probe at baseline. In addition, approximately half of the patients (n = 533) had a follow-up measurement using the same method, generating a subgroup with changes in liver stiffness. “Improved” liver stiffness was defined as a decrease in LSM greater than 20% from baseline, “impaired” liver stiffness was defined as an increase in LSM greater than 20% from baseline, and “stable” liver stiffness was defined as a change falling between 20% lower and 20% higher than baseline.

At baseline, mean LSM was 17.6 kPa. Cox regression analysis revealed that baseline LSM was independently associated with HCC (hazard ratio, 1.03; 95% confidence interval, 1.00-1.04; P = .003), liver decompensation (HR, 1.03; 95% CI, 1.02-1.04; P < .001), and liver-related death (HR, 1.02; 95% CI, 1.00-1.03; P = .005), but not extrahepatic events.

According to the investigators, the association between LSM at baseline and risk of liver decompensation was maintained after adjustment for the severity of liver disease and for surrogate markers of portal hypertension, they noted. Furthermore, patients with a baseline LSM of at least 21 kPa – which indicates high risk of clinically significant portal hypertension (CSPH) – were at greater risk of liver decompensation than were those with an LSM less than 21 kPa (HR, 3.71; 95% CI, 1.89-6.78; P = .04).

In the subgroup with follow-up measurements, approximately half of the patients had an improved LSM (53.3%), while 27.2% had a stable LSM, and 19.5% had an impaired LSM, a pattern that was significantly associated with diabetes at baseline (P = .01).

“These data agree with the available literature identifying diabetes as a risk factor for liver disease progression and liver-related complications,” the investigators wrote.

Cox regression showed that, among those with follow-up LSM, changes in LSM were independently associated with HCC (HR, 1.72; 95% CI, 1.01-3.02; P = .04), liver decompensation (HR, 1.56; 95% CI, 1.05-2.51; P = . 04), liver-related mortality (HR, 1.96; 95% CI, 1.10-3.38; P = .02), and mortality of any cause (HR, 1.73; 95% CI, 1.11-2.69; P = .01).

These risks could be further stratified by level of change in liver stiffness, with greater impairment predicting greater risk: The crude rate of liver decompensation was 14.4% among those with impaired LSM, compared with 6.2% among those with stable LSM and 3.8% among those with LSM improvement. That said, the categories of changes in LSM were not predictive of decompensation among patients with high risk of CSPH at baseline; however, they remained predictive among those with low risk of CSPH at baseline.

“[T]his study … showed that an integrated assessment of baseline LSM or [changes in LSM] can help in stratifying the risk of development of liver-related complications and of both hepatic and overall mortality,” the investigators concluded. “These data, if further validated, could help personalize prognosis and follow-up in NAFLD with [compensated advanced chronic liver disease].”

The investigators disclosed relationships with AbbVie, Novo Nordisk, Gilead, and others.

Among patients with nonalcoholic fatty liver disease (NAFLD) and compensated advanced chronic liver disease, liver stiffness measurements (LSMs) are associated with risks of hepatic events, according to a retrospective analysis of more than 1,000 patients.

“[N]oninvasive markers that can predict liver disease severity and outcomes in patients with NAFLD and advanced fibrosis are a major unmet need,” wrote lead author Salvatore Petta, MD, of the University of Palermo, Italy, and colleagues. Their report is in Clinical Gastroenterology and Hepatology. “Data about the accuracy of LSM in the prediction of events in NAFLD, and especially in patients with NAFLD and F3-F4 fibrosis, are scarce.”

To address this knowledge gap, the investigators retrospectively analyzed data from 1,039 consecutive patients with NAFLD who had baseline LSMs of more than 10 kPa and/or histologically diagnosed F3-F4 fibrosis. Patients were prospectively recruited at 10 centers in 6 countries, then followed for a median of 35 months, ranging from 19 to 63 months.

All patients had their liver stiffness measured with an M or XL probe at baseline. In addition, approximately half of the patients (n = 533) had a follow-up measurement using the same method, generating a subgroup with changes in liver stiffness. “Improved” liver stiffness was defined as a decrease in LSM greater than 20% from baseline, “impaired” liver stiffness was defined as an increase in LSM greater than 20% from baseline, and “stable” liver stiffness was defined as a change falling between 20% lower and 20% higher than baseline.

At baseline, mean LSM was 17.6 kPa. Cox regression analysis revealed that baseline LSM was independently associated with HCC (hazard ratio, 1.03; 95% confidence interval, 1.00-1.04; P = .003), liver decompensation (HR, 1.03; 95% CI, 1.02-1.04; P < .001), and liver-related death (HR, 1.02; 95% CI, 1.00-1.03; P = .005), but not extrahepatic events.

According to the investigators, the association between LSM at baseline and risk of liver decompensation was maintained after adjustment for the severity of liver disease and for surrogate markers of portal hypertension, they noted. Furthermore, patients with a baseline LSM of at least 21 kPa – which indicates high risk of clinically significant portal hypertension (CSPH) – were at greater risk of liver decompensation than were those with an LSM less than 21 kPa (HR, 3.71; 95% CI, 1.89-6.78; P = .04).

In the subgroup with follow-up measurements, approximately half of the patients had an improved LSM (53.3%), while 27.2% had a stable LSM, and 19.5% had an impaired LSM, a pattern that was significantly associated with diabetes at baseline (P = .01).

“These data agree with the available literature identifying diabetes as a risk factor for liver disease progression and liver-related complications,” the investigators wrote.

Cox regression showed that, among those with follow-up LSM, changes in LSM were independently associated with HCC (HR, 1.72; 95% CI, 1.01-3.02; P = .04), liver decompensation (HR, 1.56; 95% CI, 1.05-2.51; P = . 04), liver-related mortality (HR, 1.96; 95% CI, 1.10-3.38; P = .02), and mortality of any cause (HR, 1.73; 95% CI, 1.11-2.69; P = .01).

These risks could be further stratified by level of change in liver stiffness, with greater impairment predicting greater risk: The crude rate of liver decompensation was 14.4% among those with impaired LSM, compared with 6.2% among those with stable LSM and 3.8% among those with LSM improvement. That said, the categories of changes in LSM were not predictive of decompensation among patients with high risk of CSPH at baseline; however, they remained predictive among those with low risk of CSPH at baseline.

“[T]his study … showed that an integrated assessment of baseline LSM or [changes in LSM] can help in stratifying the risk of development of liver-related complications and of both hepatic and overall mortality,” the investigators concluded. “These data, if further validated, could help personalize prognosis and follow-up in NAFLD with [compensated advanced chronic liver disease].”

The investigators disclosed relationships with AbbVie, Novo Nordisk, Gilead, and others.

A mitochondrial DNA variant may increase the risk of gallstone disease more than fourfold, according to investigators.

wir0man/GettyImages

Mitochondrial DNA 827A>G disrupts mitochondrial function and leads to abnormal cholesterol transport, which increases gallstone development, reported Dayan Sun, of Fudan University, Shanghai, China, and colleagues.

The investigators noted that the findings add support to a genetic role in gallstone development, which could allow for identification of at-risk individuals and implementation of preventive measures.

“The etiology of gallstone disease is multifactorial; age, sex, pregnancy, diet (macronutrients, alcohol, and coffee), and other factors are involved,” the investigators wrote in Cellular and Molecular Gastroenterology and Hepatology. “Moreover, the significant familial predisposition and ethnic differences in prevalence of this disease indicate the potential influences of genetic factors.”

In 2002, Nakeeb and colleagues reported that at least 30% of gallstone disease cases stemmed from genetic factors. And genetics may play an even greater role in certain populations, such as Native Americans, among whom more than 70% of women have gallstone disease, based on a study by Everhart and colleagues.

According to Ms. Sun and colleagues, a variety of genetic drivers of gallstone disease have been identified, such as ABCG8, identified as the most common genetic risk factor by at least one study, along with a list of other rare mutations, such as one affecting CFTR that leads to altered bile composition.

Based on previous research that linked mitochondrial DNA variants with metabolic defects and, more specifically, aberrations in lipid metabolism, as well as an observed “maternal bias in the maternal transmission of gallstone disease” that suggest mitochondrial influence, the investigators looked for patterns specifically in mitochondrial DNA variants among patients with gallstones.

The study enrolled 104 probands with confirmed gallstone disease and 300 unrelated controls. After collecting DNA samples from all participants, the investigators sequenced mitochondrial DNA HVS1 regions. A comparison of haplogroups showed that B4b’d’e’j was more common among patients with gallstone disease than among controls (odds ratio, 4.428; P = .00012), and further analysis pinpointed 827A>G, a variant in 12S ribosomal RNA.

“During the evolutionary history of modern humans, haplogroup B4 might have originated in East Asia approximately 40,000 years ago,” the investigators wrote, noting that B2, a subhaplogroup of B4, “was a founder haplogroup and expanded in the Americas after the Last Glacial Maximum (approximately 20,000 years ago).”

According to the investigators, this may explain why Native Americans have a higher prevalence of gallstones than East Asians (14%-35% vs. 3%-12%) because they are more often carriers of B4 (14%-44% vs. 2%-8%).

The investigators sought to characterize the impact that the 827A>G variant has on mitochondrial function and found effects ranging from lower respiratory chain complex activity, diminished mitochondrial function, activated mitochondrial protein quality control and retrograde signaling pathways, abnormal lipid metabolism, and abnormal cholesterol transport processes.

For example, the investigators investigated respiratory chain complex activity by creating two sister branch haplogroup cell models, including six cybrids for 827A and six more for 827G, which is how they detected the lower activity. Another step the investigators took was corroborating this finding by detecting OXPHOS function in the 827A and 827G cybrids to determine mitochondrial function.

“In summary, our study demonstrates a potential link between mitochondrial DNA 827A>G and gallstone disease,” the investigators wrote. “Our findings provide a significant biological basis for the clinical diagnosis and prevention of gallstone disease in the future.”

The study was funded by the National Natural Science Foundation of China, the 111 Project, the Shanghai Municipal Science and Technology Major Project, the Scientific and Technology Committee of Shanghai Municipality, and the CAMS Innovation Fund for Medical Sciences. The investigators reported no conflicts of interest.

A mitochondrial DNA variant may increase the risk of gallstone disease more than fourfold, according to investigators.

wir0man/GettyImages

Mitochondrial DNA 827A>G disrupts mitochondrial function and leads to abnormal cholesterol transport, which increases gallstone development, reported Dayan Sun, of Fudan University, Shanghai, China, and colleagues.

The investigators noted that the findings add support to a genetic role in gallstone development, which could allow for identification of at-risk individuals and implementation of preventive measures.

“The etiology of gallstone disease is multifactorial; age, sex, pregnancy, diet (macronutrients, alcohol, and coffee), and other factors are involved,” the investigators wrote in Cellular and Molecular Gastroenterology and Hepatology. “Moreover, the significant familial predisposition and ethnic differences in prevalence of this disease indicate the potential influences of genetic factors.”

In 2002, Nakeeb and colleagues reported that at least 30% of gallstone disease cases stemmed from genetic factors. And genetics may play an even greater role in certain populations, such as Native Americans, among whom more than 70% of women have gallstone disease, based on a study by Everhart and colleagues.

According to Ms. Sun and colleagues, a variety of genetic drivers of gallstone disease have been identified, such as ABCG8, identified as the most common genetic risk factor by at least one study, along with a list of other rare mutations, such as one affecting CFTR that leads to altered bile composition.

Based on previous research that linked mitochondrial DNA variants with metabolic defects and, more specifically, aberrations in lipid metabolism, as well as an observed “maternal bias in the maternal transmission of gallstone disease” that suggest mitochondrial influence, the investigators looked for patterns specifically in mitochondrial DNA variants among patients with gallstones.

The study enrolled 104 probands with confirmed gallstone disease and 300 unrelated controls. After collecting DNA samples from all participants, the investigators sequenced mitochondrial DNA HVS1 regions. A comparison of haplogroups showed that B4b’d’e’j was more common among patients with gallstone disease than among controls (odds ratio, 4.428; P = .00012), and further analysis pinpointed 827A>G, a variant in 12S ribosomal RNA.

“During the evolutionary history of modern humans, haplogroup B4 might have originated in East Asia approximately 40,000 years ago,” the investigators wrote, noting that B2, a subhaplogroup of B4, “was a founder haplogroup and expanded in the Americas after the Last Glacial Maximum (approximately 20,000 years ago).”

According to the investigators, this may explain why Native Americans have a higher prevalence of gallstones than East Asians (14%-35% vs. 3%-12%) because they are more often carriers of B4 (14%-44% vs. 2%-8%).

The investigators sought to characterize the impact that the 827A>G variant has on mitochondrial function and found effects ranging from lower respiratory chain complex activity, diminished mitochondrial function, activated mitochondrial protein quality control and retrograde signaling pathways, abnormal lipid metabolism, and abnormal cholesterol transport processes.

For example, the investigators investigated respiratory chain complex activity by creating two sister branch haplogroup cell models, including six cybrids for 827A and six more for 827G, which is how they detected the lower activity. Another step the investigators took was corroborating this finding by detecting OXPHOS function in the 827A and 827G cybrids to determine mitochondrial function.

“In summary, our study demonstrates a potential link between mitochondrial DNA 827A>G and gallstone disease,” the investigators wrote. “Our findings provide a significant biological basis for the clinical diagnosis and prevention of gallstone disease in the future.”

The study was funded by the National Natural Science Foundation of China, the 111 Project, the Shanghai Municipal Science and Technology Major Project, the Scientific and Technology Committee of Shanghai Municipality, and the CAMS Innovation Fund for Medical Sciences. The investigators reported no conflicts of interest.

A mitochondrial DNA variant may increase the risk of gallstone disease more than fourfold, according to investigators.

wir0man/GettyImages

Mitochondrial DNA 827A>G disrupts mitochondrial function and leads to abnormal cholesterol transport, which increases gallstone development, reported Dayan Sun, of Fudan University, Shanghai, China, and colleagues.

The investigators noted that the findings add support to a genetic role in gallstone development, which could allow for identification of at-risk individuals and implementation of preventive measures.

“The etiology of gallstone disease is multifactorial; age, sex, pregnancy, diet (macronutrients, alcohol, and coffee), and other factors are involved,” the investigators wrote in Cellular and Molecular Gastroenterology and Hepatology. “Moreover, the significant familial predisposition and ethnic differences in prevalence of this disease indicate the potential influences of genetic factors.”

In 2002, Nakeeb and colleagues reported that at least 30% of gallstone disease cases stemmed from genetic factors. And genetics may play an even greater role in certain populations, such as Native Americans, among whom more than 70% of women have gallstone disease, based on a study by Everhart and colleagues.

According to Ms. Sun and colleagues, a variety of genetic drivers of gallstone disease have been identified, such as ABCG8, identified as the most common genetic risk factor by at least one study, along with a list of other rare mutations, such as one affecting CFTR that leads to altered bile composition.

Based on previous research that linked mitochondrial DNA variants with metabolic defects and, more specifically, aberrations in lipid metabolism, as well as an observed “maternal bias in the maternal transmission of gallstone disease” that suggest mitochondrial influence, the investigators looked for patterns specifically in mitochondrial DNA variants among patients with gallstones.

The study enrolled 104 probands with confirmed gallstone disease and 300 unrelated controls. After collecting DNA samples from all participants, the investigators sequenced mitochondrial DNA HVS1 regions. A comparison of haplogroups showed that B4b’d’e’j was more common among patients with gallstone disease than among controls (odds ratio, 4.428; P = .00012), and further analysis pinpointed 827A>G, a variant in 12S ribosomal RNA.

“During the evolutionary history of modern humans, haplogroup B4 might have originated in East Asia approximately 40,000 years ago,” the investigators wrote, noting that B2, a subhaplogroup of B4, “was a founder haplogroup and expanded in the Americas after the Last Glacial Maximum (approximately 20,000 years ago).”

According to the investigators, this may explain why Native Americans have a higher prevalence of gallstones than East Asians (14%-35% vs. 3%-12%) because they are more often carriers of B4 (14%-44% vs. 2%-8%).

The investigators sought to characterize the impact that the 827A>G variant has on mitochondrial function and found effects ranging from lower respiratory chain complex activity, diminished mitochondrial function, activated mitochondrial protein quality control and retrograde signaling pathways, abnormal lipid metabolism, and abnormal cholesterol transport processes.

For example, the investigators investigated respiratory chain complex activity by creating two sister branch haplogroup cell models, including six cybrids for 827A and six more for 827G, which is how they detected the lower activity. Another step the investigators took was corroborating this finding by detecting OXPHOS function in the 827A and 827G cybrids to determine mitochondrial function.

“In summary, our study demonstrates a potential link between mitochondrial DNA 827A>G and gallstone disease,” the investigators wrote. “Our findings provide a significant biological basis for the clinical diagnosis and prevention of gallstone disease in the future.”

The study was funded by the National Natural Science Foundation of China, the 111 Project, the Shanghai Municipal Science and Technology Major Project, the Scientific and Technology Committee of Shanghai Municipality, and the CAMS Innovation Fund for Medical Sciences. The investigators reported no conflicts of interest.

Proton pump inhibitors (PPIs) improve functional dyspepsia (FD) by reducing duodenal eosinophils and mast cells, according to a prospective study.

This suggests that the anti-inflammatory effects of PPIs are responsible for symptom improvement, and not barrier-protective or acid-suppressive effects, a finding that may guide future therapies and biomarkers, reported lead author Lucas Wauters, PhD, of University Hospitals Leuven (Belgium), and colleagues reported in Gastroenterology.

“FD is a common and unexplained disorder with unknown pathophysiology, hampering a conclusive diagnosis and the development of effective drugs,” the investigators wrote.

Although PPIs are currently used as first-line FD therapy, ostensibly for acid suppression, “the exact mechanism of action of PPIs in FD is unknown,” the investigators noted.

According to Dr. Wauters and colleagues, previous FD studies, such as a 2020 study published in Gut, have reported a variety of pathophysiological findings in the duodenum, including increased eosinophils and mast cells, as well as activation of duodenogastric reflexes, which suggests “a primary role for duodenal pathology in FD symptom generation.” Several drivers of this pathology have been proposed. Some, such as aberrations in bile salts and acidity, point to local, luminal changes, whereas others, such as dysregulated hypothalamic-pituitary-adrenal axis responsiveness and psychosocial factors, implicate a broader set of drivers, the investigators wrote.

The present study explored this landscape through a prospective trial that enrolled 30 healthy volunteers and 47 patients with FD (2 patients with FD did not complete the study).

Patients with FD were subgrouped into “FD-starters” who had not taken PPIs and/or acid suppression for at least 3 months leading up to the trial (n = 28) and “FD-stoppers” who had refractory symptoms after at least 1 month of daily PPI usage (n = 19). Among participants with FD, 25 had postprandial distress syndrome (PDS), 9 had epigastric pain syndrome (EPS), and 13 had subtype overlap.

For the trial, FD-starters and healthy volunteers took 4 weeks of pantoprazole 40 mg once daily, whereas FD-stoppers ceased PPI therapy for 8 weeks. Before and after these respective periods, certain study procedures were conducted, including duodenal biopsy collection, duodenal fluid aspiration, and questionnaires for symptoms and stress. The study also included use of Ussing chambers for biopsies, immunohistochemistry, and bile salt measurements.

FD-starters were significantly more symptomatic than healthy volunteers were at baseline. After starting PPIs, those with FD had symptom improvements, confirming “clinical efficacy of a standard course of PPIs in all FD subtypes,” whereas healthy volunteers showed no significant change in symptoms.

Similarly, baseline duodenal eosinophil counts were higher in FD-starters than in healthy volunteers. On starting PPIs, however, eosinophil counts in these two groups moved in opposite directions: FD-starters’ counts dropped from a mean of 331 to 183 eosinophils/mm², whereas healthy volunteers’ counts rose from a mean of 115 to 229 eosinophils/mm² (P < .0001). Changes in mast cells and paracellular passage followed the same pattern, falling in FD-starters and rising in healthy volunteers. On the other hand, symptoms actually improved in the FD-stoppers after they went off PPIs, although they did not reach symptom levels of the healthy volunteers.

“Differential effects of PPIs in healthy volunteers point to the role of luminal changes in determining low-grade mucosal immune activation in the duodenum, which can also occur in FD after long-term use and provide arguments against continued use in refractory patients,” the investigators wrote.

Dr. Wauters and colleagues suggested that their findings could guide future approaches to FD management.

“Our results suggest that quantification of duodenal eosinophils has the potential to become part of diagnostic workup and guide therapeutic decisions in FD,” they wrote. “Additional study of the underlying mediators might lead to the discovery of new potential biomarkers or novel therapeutic targets, potentially allowing the identification of subgroups responding to biologically targeted rather than symptom-based treatments.”

The study was supported by the clinical research fund of the University Hospitals Leuven. The investigators reported no conflicts of interest.

Proton pump inhibitors (PPIs) improve functional dyspepsia (FD) by reducing duodenal eosinophils and mast cells, according to a prospective study.

This suggests that the anti-inflammatory effects of PPIs are responsible for symptom improvement, and not barrier-protective or acid-suppressive effects, a finding that may guide future therapies and biomarkers, reported lead author Lucas Wauters, PhD, of University Hospitals Leuven (Belgium), and colleagues reported in Gastroenterology.

“FD is a common and unexplained disorder with unknown pathophysiology, hampering a conclusive diagnosis and the development of effective drugs,” the investigators wrote.

Although PPIs are currently used as first-line FD therapy, ostensibly for acid suppression, “the exact mechanism of action of PPIs in FD is unknown,” the investigators noted.

According to Dr. Wauters and colleagues, previous FD studies, such as a 2020 study published in Gut, have reported a variety of pathophysiological findings in the duodenum, including increased eosinophils and mast cells, as well as activation of duodenogastric reflexes, which suggests “a primary role for duodenal pathology in FD symptom generation.” Several drivers of this pathology have been proposed. Some, such as aberrations in bile salts and acidity, point to local, luminal changes, whereas others, such as dysregulated hypothalamic-pituitary-adrenal axis responsiveness and psychosocial factors, implicate a broader set of drivers, the investigators wrote.

The present study explored this landscape through a prospective trial that enrolled 30 healthy volunteers and 47 patients with FD (2 patients with FD did not complete the study).

Patients with FD were subgrouped into “FD-starters” who had not taken PPIs and/or acid suppression for at least 3 months leading up to the trial (n = 28) and “FD-stoppers” who had refractory symptoms after at least 1 month of daily PPI usage (n = 19). Among participants with FD, 25 had postprandial distress syndrome (PDS), 9 had epigastric pain syndrome (EPS), and 13 had subtype overlap.

For the trial, FD-starters and healthy volunteers took 4 weeks of pantoprazole 40 mg once daily, whereas FD-stoppers ceased PPI therapy for 8 weeks. Before and after these respective periods, certain study procedures were conducted, including duodenal biopsy collection, duodenal fluid aspiration, and questionnaires for symptoms and stress. The study also included use of Ussing chambers for biopsies, immunohistochemistry, and bile salt measurements.

FD-starters were significantly more symptomatic than healthy volunteers were at baseline. After starting PPIs, those with FD had symptom improvements, confirming “clinical efficacy of a standard course of PPIs in all FD subtypes,” whereas healthy volunteers showed no significant change in symptoms.

Similarly, baseline duodenal eosinophil counts were higher in FD-starters than in healthy volunteers. On starting PPIs, however, eosinophil counts in these two groups moved in opposite directions: FD-starters’ counts dropped from a mean of 331 to 183 eosinophils/mm², whereas healthy volunteers’ counts rose from a mean of 115 to 229 eosinophils/mm² (P < .0001). Changes in mast cells and paracellular passage followed the same pattern, falling in FD-starters and rising in healthy volunteers. On the other hand, symptoms actually improved in the FD-stoppers after they went off PPIs, although they did not reach symptom levels of the healthy volunteers.

“Differential effects of PPIs in healthy volunteers point to the role of luminal changes in determining low-grade mucosal immune activation in the duodenum, which can also occur in FD after long-term use and provide arguments against continued use in refractory patients,” the investigators wrote.

Dr. Wauters and colleagues suggested that their findings could guide future approaches to FD management.

“Our results suggest that quantification of duodenal eosinophils has the potential to become part of diagnostic workup and guide therapeutic decisions in FD,” they wrote. “Additional study of the underlying mediators might lead to the discovery of new potential biomarkers or novel therapeutic targets, potentially allowing the identification of subgroups responding to biologically targeted rather than symptom-based treatments.”

The study was supported by the clinical research fund of the University Hospitals Leuven. The investigators reported no conflicts of interest.

Proton pump inhibitors (PPIs) improve functional dyspepsia (FD) by reducing duodenal eosinophils and mast cells, according to a prospective study.

This suggests that the anti-inflammatory effects of PPIs are responsible for symptom improvement, and not barrier-protective or acid-suppressive effects, a finding that may guide future therapies and biomarkers, reported lead author Lucas Wauters, PhD, of University Hospitals Leuven (Belgium), and colleagues reported in Gastroenterology.

“FD is a common and unexplained disorder with unknown pathophysiology, hampering a conclusive diagnosis and the development of effective drugs,” the investigators wrote.

Although PPIs are currently used as first-line FD therapy, ostensibly for acid suppression, “the exact mechanism of action of PPIs in FD is unknown,” the investigators noted.

According to Dr. Wauters and colleagues, previous FD studies, such as a 2020 study published in Gut, have reported a variety of pathophysiological findings in the duodenum, including increased eosinophils and mast cells, as well as activation of duodenogastric reflexes, which suggests “a primary role for duodenal pathology in FD symptom generation.” Several drivers of this pathology have been proposed. Some, such as aberrations in bile salts and acidity, point to local, luminal changes, whereas others, such as dysregulated hypothalamic-pituitary-adrenal axis responsiveness and psychosocial factors, implicate a broader set of drivers, the investigators wrote.

The present study explored this landscape through a prospective trial that enrolled 30 healthy volunteers and 47 patients with FD (2 patients with FD did not complete the study).

Patients with FD were subgrouped into “FD-starters” who had not taken PPIs and/or acid suppression for at least 3 months leading up to the trial (n = 28) and “FD-stoppers” who had refractory symptoms after at least 1 month of daily PPI usage (n = 19). Among participants with FD, 25 had postprandial distress syndrome (PDS), 9 had epigastric pain syndrome (EPS), and 13 had subtype overlap.

For the trial, FD-starters and healthy volunteers took 4 weeks of pantoprazole 40 mg once daily, whereas FD-stoppers ceased PPI therapy for 8 weeks. Before and after these respective periods, certain study procedures were conducted, including duodenal biopsy collection, duodenal fluid aspiration, and questionnaires for symptoms and stress. The study also included use of Ussing chambers for biopsies, immunohistochemistry, and bile salt measurements.

FD-starters were significantly more symptomatic than healthy volunteers were at baseline. After starting PPIs, those with FD had symptom improvements, confirming “clinical efficacy of a standard course of PPIs in all FD subtypes,” whereas healthy volunteers showed no significant change in symptoms.

Similarly, baseline duodenal eosinophil counts were higher in FD-starters than in healthy volunteers. On starting PPIs, however, eosinophil counts in these two groups moved in opposite directions: FD-starters’ counts dropped from a mean of 331 to 183 eosinophils/mm², whereas healthy volunteers’ counts rose from a mean of 115 to 229 eosinophils/mm² (P < .0001). Changes in mast cells and paracellular passage followed the same pattern, falling in FD-starters and rising in healthy volunteers. On the other hand, symptoms actually improved in the FD-stoppers after they went off PPIs, although they did not reach symptom levels of the healthy volunteers.

“Differential effects of PPIs in healthy volunteers point to the role of luminal changes in determining low-grade mucosal immune activation in the duodenum, which can also occur in FD after long-term use and provide arguments against continued use in refractory patients,” the investigators wrote.

Dr. Wauters and colleagues suggested that their findings could guide future approaches to FD management.

“Our results suggest that quantification of duodenal eosinophils has the potential to become part of diagnostic workup and guide therapeutic decisions in FD,” they wrote. “Additional study of the underlying mediators might lead to the discovery of new potential biomarkers or novel therapeutic targets, potentially allowing the identification of subgroups responding to biologically targeted rather than symptom-based treatments.”

The study was supported by the clinical research fund of the University Hospitals Leuven. The investigators reported no conflicts of interest.

Modified endoscopy documentation software can automatically generate endoscopic retrograde cholangiopancreatography (ERCP) quality metrics, based on a trial at two referral centers.

Providers were prompted during procedures, and inputting any missed data took providers less than 30 additional seconds per patient. The approach led to highly accurate quality reports, lead author Gregory A. Coté, MD, MS, of the Medical University of South Carolina, Charleston, and colleagues wrote in Techniques and Innovations in Gastrointestinal Endoscopy.

The investigators suggested that these findings may lead to the kind of quality reports already used for colonoscopy, which are easier to produce. Such reports are important, they wrote, as the U.S. health care system shifts to value-based reimbursement models, which in turn puts greater scrutiny on the quality of endoscopic procedures. However, doing so with ERCP isn’t entirely straightforward.

“Measuring adherence to ERCP quality indicators is especially challenging given: variance in indications, intraprocedural maneuvers, potential outcomes of a complex procedure, and variability in physician report documentation,” Dr. Coté and colleagues wrote. “In order to operationalize robust tracking of clinically relevant adherence to ERCP quality indicators in clinical practice – that is, to provide real-time feedback to providers, health systems, payors, and patients – an automated system of measurement must be developed.”

The quality indicators used in the study were largely drawn from an American Society for Gastrointestinal Endoscopy/American College of Gastroenterology task force document, with exclusion of those that were subjective or required systematic follow-up. The investigators modified existing endoscopy documentation software at two referral centers to include mandatory, structured data fields, principally with inclusion of quality improvements deemed high priority by the society consensus document, study authors, or both. For instance, providers were obligated to select a specific indication instead of various, synonymous terms (for example, “biliary stricture” vs. “common bile duct stricture”). Examples of quality indicators included successful cannulation of the desired duct, successful retrieval of stone less than 10 mm, or successful placement of a bile duct stent when indicated. Endoscopists were also required to note the presence of postoperative foregut anatomy or presence of existing sphincterotomy, variables which serve to stratefy the quality indicator outcome for degree of difficulty and allow appropriate comparisons of data. In addition, the study authors included inquiries about use of rectal indomethacin, use of prophylactic pancreatic duct stent, and documentation of need for repeat ERCP, follow-up x-ray, or both.

After 9 months, the system recorded 1,376 ERCP procedures conducted by eight providers, with a median annualized volume of 237 procedures (range, 37-336). Almost one-third (29%) of the patients had not had prior sphincterotomy.

Automated reporting of ERCP was compared with manual record review, which confirmed high (98%-100%) accuracy. This high level of accuracy “obviates the need for manual adjudication of medical records,” the investigators wrote.

They used data from one provider to create a template report card, and while exact comparisons across providers and institutions were not published, an example report card that was published with the study showed how such comparisons could be generated in the real world.

“The tool presented in this study allows for an objective assessment of ERCP performance which can provide explicit feedback to providers and allow transparent assessment of quality outcomes; it has the potential to improve the quality of ERCP akin to what has been demonstrated using colonoscopy report cards,” the investigators wrote. “Importantly, this can be achieved with minimal alteration to providers’ routine procedure documentation.”

Dr. Coté and colleagues also noted that the software modifications “can be implemented in other endoscopy units using the same or similar software.”

Taking the project to the next level would require widespread collaboration, according to the investigators.

“A key next step is to operationalize the transfer of data across multiple institutions, allowing for the creation of interim, standard-quality indicator reports that could be disseminated to providers, health systems, and payors,” they wrote. “If applied to a national cohort, this tool could accurately assess the current landscape of ERCP quality and provide tremendous opportunities for systematic improvement.”

One author disclosed a relationship with Provation Medical, but the remaining authors declared no relevant conflicts.

Modified endoscopy documentation software can automatically generate endoscopic retrograde cholangiopancreatography (ERCP) quality metrics, based on a trial at two referral centers.

Providers were prompted during procedures, and inputting any missed data took providers less than 30 additional seconds per patient. The approach led to highly accurate quality reports, lead author Gregory A. Coté, MD, MS, of the Medical University of South Carolina, Charleston, and colleagues wrote in Techniques and Innovations in Gastrointestinal Endoscopy.

The investigators suggested that these findings may lead to the kind of quality reports already used for colonoscopy, which are easier to produce. Such reports are important, they wrote, as the U.S. health care system shifts to value-based reimbursement models, which in turn puts greater scrutiny on the quality of endoscopic procedures. However, doing so with ERCP isn’t entirely straightforward.

“Measuring adherence to ERCP quality indicators is especially challenging given: variance in indications, intraprocedural maneuvers, potential outcomes of a complex procedure, and variability in physician report documentation,” Dr. Coté and colleagues wrote. “In order to operationalize robust tracking of clinically relevant adherence to ERCP quality indicators in clinical practice – that is, to provide real-time feedback to providers, health systems, payors, and patients – an automated system of measurement must be developed.”

The quality indicators used in the study were largely drawn from an American Society for Gastrointestinal Endoscopy/American College of Gastroenterology task force document, with exclusion of those that were subjective or required systematic follow-up. The investigators modified existing endoscopy documentation software at two referral centers to include mandatory, structured data fields, principally with inclusion of quality improvements deemed high priority by the society consensus document, study authors, or both. For instance, providers were obligated to select a specific indication instead of various, synonymous terms (for example, “biliary stricture” vs. “common bile duct stricture”). Examples of quality indicators included successful cannulation of the desired duct, successful retrieval of stone less than 10 mm, or successful placement of a bile duct stent when indicated. Endoscopists were also required to note the presence of postoperative foregut anatomy or presence of existing sphincterotomy, variables which serve to stratefy the quality indicator outcome for degree of difficulty and allow appropriate comparisons of data. In addition, the study authors included inquiries about use of rectal indomethacin, use of prophylactic pancreatic duct stent, and documentation of need for repeat ERCP, follow-up x-ray, or both.

After 9 months, the system recorded 1,376 ERCP procedures conducted by eight providers, with a median annualized volume of 237 procedures (range, 37-336). Almost one-third (29%) of the patients had not had prior sphincterotomy.

Automated reporting of ERCP was compared with manual record review, which confirmed high (98%-100%) accuracy. This high level of accuracy “obviates the need for manual adjudication of medical records,” the investigators wrote.

They used data from one provider to create a template report card, and while exact comparisons across providers and institutions were not published, an example report card that was published with the study showed how such comparisons could be generated in the real world.

“The tool presented in this study allows for an objective assessment of ERCP performance which can provide explicit feedback to providers and allow transparent assessment of quality outcomes; it has the potential to improve the quality of ERCP akin to what has been demonstrated using colonoscopy report cards,” the investigators wrote. “Importantly, this can be achieved with minimal alteration to providers’ routine procedure documentation.”

Dr. Coté and colleagues also noted that the software modifications “can be implemented in other endoscopy units using the same or similar software.”

Taking the project to the next level would require widespread collaboration, according to the investigators.

“A key next step is to operationalize the transfer of data across multiple institutions, allowing for the creation of interim, standard-quality indicator reports that could be disseminated to providers, health systems, and payors,” they wrote. “If applied to a national cohort, this tool could accurately assess the current landscape of ERCP quality and provide tremendous opportunities for systematic improvement.”

One author disclosed a relationship with Provation Medical, but the remaining authors declared no relevant conflicts.

Modified endoscopy documentation software can automatically generate endoscopic retrograde cholangiopancreatography (ERCP) quality metrics, based on a trial at two referral centers.

Providers were prompted during procedures, and inputting any missed data took providers less than 30 additional seconds per patient. The approach led to highly accurate quality reports, lead author Gregory A. Coté, MD, MS, of the Medical University of South Carolina, Charleston, and colleagues wrote in Techniques and Innovations in Gastrointestinal Endoscopy.

The investigators suggested that these findings may lead to the kind of quality reports already used for colonoscopy, which are easier to produce. Such reports are important, they wrote, as the U.S. health care system shifts to value-based reimbursement models, which in turn puts greater scrutiny on the quality of endoscopic procedures. However, doing so with ERCP isn’t entirely straightforward.

“Measuring adherence to ERCP quality indicators is especially challenging given: variance in indications, intraprocedural maneuvers, potential outcomes of a complex procedure, and variability in physician report documentation,” Dr. Coté and colleagues wrote. “In order to operationalize robust tracking of clinically relevant adherence to ERCP quality indicators in clinical practice – that is, to provide real-time feedback to providers, health systems, payors, and patients – an automated system of measurement must be developed.”

The quality indicators used in the study were largely drawn from an American Society for Gastrointestinal Endoscopy/American College of Gastroenterology task force document, with exclusion of those that were subjective or required systematic follow-up. The investigators modified existing endoscopy documentation software at two referral centers to include mandatory, structured data fields, principally with inclusion of quality improvements deemed high priority by the society consensus document, study authors, or both. For instance, providers were obligated to select a specific indication instead of various, synonymous terms (for example, “biliary stricture” vs. “common bile duct stricture”). Examples of quality indicators included successful cannulation of the desired duct, successful retrieval of stone less than 10 mm, or successful placement of a bile duct stent when indicated. Endoscopists were also required to note the presence of postoperative foregut anatomy or presence of existing sphincterotomy, variables which serve to stratefy the quality indicator outcome for degree of difficulty and allow appropriate comparisons of data. In addition, the study authors included inquiries about use of rectal indomethacin, use of prophylactic pancreatic duct stent, and documentation of need for repeat ERCP, follow-up x-ray, or both.

After 9 months, the system recorded 1,376 ERCP procedures conducted by eight providers, with a median annualized volume of 237 procedures (range, 37-336). Almost one-third (29%) of the patients had not had prior sphincterotomy.

Automated reporting of ERCP was compared with manual record review, which confirmed high (98%-100%) accuracy. This high level of accuracy “obviates the need for manual adjudication of medical records,” the investigators wrote.

They used data from one provider to create a template report card, and while exact comparisons across providers and institutions were not published, an example report card that was published with the study showed how such comparisons could be generated in the real world.

“The tool presented in this study allows for an objective assessment of ERCP performance which can provide explicit feedback to providers and allow transparent assessment of quality outcomes; it has the potential to improve the quality of ERCP akin to what has been demonstrated using colonoscopy report cards,” the investigators wrote. “Importantly, this can be achieved with minimal alteration to providers’ routine procedure documentation.”

Dr. Coté and colleagues also noted that the software modifications “can be implemented in other endoscopy units using the same or similar software.”

Taking the project to the next level would require widespread collaboration, according to the investigators.

“A key next step is to operationalize the transfer of data across multiple institutions, allowing for the creation of interim, standard-quality indicator reports that could be disseminated to providers, health systems, and payors,” they wrote. “If applied to a national cohort, this tool could accurately assess the current landscape of ERCP quality and provide tremendous opportunities for systematic improvement.”

One author disclosed a relationship with Provation Medical, but the remaining authors declared no relevant conflicts.

Clinicians who manage patients with cirrhosis should incorporate palliative care “irrespective of transplant candidacy,” according to a clinical practice update from the American Gastroenterological Association.

“[T]his care should be based on needs assessment instead of prognosis alone, delivered concurrently with curative or life-prolonging treatments, and tailored to the stage of disease,” wrote Puneeta Tandon, MD, of University of Alberta in Edmonton, Alta., and associates. Their report is in Clinical Gastroenterology and Hepatology.

Cirrhosis has a median survival ranging from 2 years for decompensated disease to 12 years for compensated disease, according to one systemic review. Moreover, even compensated cirrhosis incurs “a high burden of physical and psychological symptoms,” which increases as cirrhosis progresses, the update authors noted.

According to another review, there is established evidence outside cirrhosis that palliative care – including comprehensive symptom management, advance care planning, and timely referrals to specialty palliative care and hospice support – has the potential to significantly improve quality of life, end-of-life care, health care costs, coordination among providers, and caregiver outcomes.

However, the update authors noted that there remain few guidelines or guidance statements regarding palliative care in cirrhosis. Hence, the clinical practice update reviews 10 best practices to help clinicians fill this gap.

Providers “from any specialty, within any healthcare setting” can help provide palliative care for patients with cirrhosis, the experts emphasized. This is, in part, because of the growing population with cirrhosis being met with a limited number of palliative care specialists; dealing with this reality can be helped by inviting other providers to learn about and engage in palliative care.

Another best practice statement addressed assessing symptoms “within physical, psychological, social, and spiritual domains related to [patients’] liver disease, its treatment, and prognosis.” This approach is needed because of the complex effects that a life-threatening illness and its symptoms can have on many variables, including loss of independence/identity, financial stress, and impact on personal relationships. A systematic review of symptom prevalence in end-stage liver disease revealed a complex milieu, including pain, muscle cramps, sexual dysfunction, insomnia, and anxiety.

High-quality communication is important in palliative care, including discussion of prognosis and goals of care. Providers specializing in gastroenterology/hepatology should reevaluate prognosis and clarify prognosis and goals of care with patients and caregivers during routine visits and sentinel events, such as new complications, a hospital or intensive care admission, and when transplant eligibility is determined. However, prognostication in cirrhosis can be challenging, the experts noted. The update authors also acknowledged that, while more research is needed to inform practice regarding communicating with patients with serious illness about palliative care and goals of care, there are courses and resources meant to help improve those skills, including those provided by Vital Talk, Respecting Choices, and the Serious Illness Conversation Guide.

Cirrhosis “has physical, mental, and financial consequences” for caregivers, especially when patients have decompensated disease. To support caregivers, clinicians can routinely evaluate their burdens and needs. Tools such as the Caregiver Strain Index are useful and can be administered by ancillary staff. Clinicians also can reach out to primary care and palliative care providers to identify local resources for caregiver support.

“Because lack of time is one of the major barriers to administering palliative care, healthcare providers should consider how they can optimize efficiencies in palliative care delivery,” the experts wrote. Examples include identifying local billing codes, arranging for ancillary staff to screen patients on their palliative care needs, and setting up multidisciplinary teams that work together to deliver palliative care. If access to specialty palliative care is limited, providers can collaborate with local specialist teams to set “clear triggers and pathways for referral.”

Finally, hospice referrals are often delayed for patients with cirrhosis. “Find out your local referral criteria for hospice and what would be required to refer a cirrhosis patient there,” the experts advised. “Healthcare providers caring for patients with cirrhosis should provide timely referral to hospice for patients who have comfort-oriented goals and prognosis of 6 months or less.”

The authors of the clinical practice update received no funding support. They reported having no relevant conflicts of interest.

Clinicians who manage patients with cirrhosis should incorporate palliative care “irrespective of transplant candidacy,” according to a clinical practice update from the American Gastroenterological Association.

“[T]his care should be based on needs assessment instead of prognosis alone, delivered concurrently with curative or life-prolonging treatments, and tailored to the stage of disease,” wrote Puneeta Tandon, MD, of University of Alberta in Edmonton, Alta., and associates. Their report is in Clinical Gastroenterology and Hepatology.

Cirrhosis has a median survival ranging from 2 years for decompensated disease to 12 years for compensated disease, according to one systemic review. Moreover, even compensated cirrhosis incurs “a high burden of physical and psychological symptoms,” which increases as cirrhosis progresses, the update authors noted.

According to another review, there is established evidence outside cirrhosis that palliative care – including comprehensive symptom management, advance care planning, and timely referrals to specialty palliative care and hospice support – has the potential to significantly improve quality of life, end-of-life care, health care costs, coordination among providers, and caregiver outcomes.

However, the update authors noted that there remain few guidelines or guidance statements regarding palliative care in cirrhosis. Hence, the clinical practice update reviews 10 best practices to help clinicians fill this gap.

Providers “from any specialty, within any healthcare setting” can help provide palliative care for patients with cirrhosis, the experts emphasized. This is, in part, because of the growing population with cirrhosis being met with a limited number of palliative care specialists; dealing with this reality can be helped by inviting other providers to learn about and engage in palliative care.

Another best practice statement addressed assessing symptoms “within physical, psychological, social, and spiritual domains related to [patients’] liver disease, its treatment, and prognosis.” This approach is needed because of the complex effects that a life-threatening illness and its symptoms can have on many variables, including loss of independence/identity, financial stress, and impact on personal relationships. A systematic review of symptom prevalence in end-stage liver disease revealed a complex milieu, including pain, muscle cramps, sexual dysfunction, insomnia, and anxiety.

High-quality communication is important in palliative care, including discussion of prognosis and goals of care. Providers specializing in gastroenterology/hepatology should reevaluate prognosis and clarify prognosis and goals of care with patients and caregivers during routine visits and sentinel events, such as new complications, a hospital or intensive care admission, and when transplant eligibility is determined. However, prognostication in cirrhosis can be challenging, the experts noted. The update authors also acknowledged that, while more research is needed to inform practice regarding communicating with patients with serious illness about palliative care and goals of care, there are courses and resources meant to help improve those skills, including those provided by Vital Talk, Respecting Choices, and the Serious Illness Conversation Guide.

Cirrhosis “has physical, mental, and financial consequences” for caregivers, especially when patients have decompensated disease. To support caregivers, clinicians can routinely evaluate their burdens and needs. Tools such as the Caregiver Strain Index are useful and can be administered by ancillary staff. Clinicians also can reach out to primary care and palliative care providers to identify local resources for caregiver support.

“Because lack of time is one of the major barriers to administering palliative care, healthcare providers should consider how they can optimize efficiencies in palliative care delivery,” the experts wrote. Examples include identifying local billing codes, arranging for ancillary staff to screen patients on their palliative care needs, and setting up multidisciplinary teams that work together to deliver palliative care. If access to specialty palliative care is limited, providers can collaborate with local specialist teams to set “clear triggers and pathways for referral.”

Finally, hospice referrals are often delayed for patients with cirrhosis. “Find out your local referral criteria for hospice and what would be required to refer a cirrhosis patient there,” the experts advised. “Healthcare providers caring for patients with cirrhosis should provide timely referral to hospice for patients who have comfort-oriented goals and prognosis of 6 months or less.”

The authors of the clinical practice update received no funding support. They reported having no relevant conflicts of interest.

Clinicians who manage patients with cirrhosis should incorporate palliative care “irrespective of transplant candidacy,” according to a clinical practice update from the American Gastroenterological Association.

“[T]his care should be based on needs assessment instead of prognosis alone, delivered concurrently with curative or life-prolonging treatments, and tailored to the stage of disease,” wrote Puneeta Tandon, MD, of University of Alberta in Edmonton, Alta., and associates. Their report is in Clinical Gastroenterology and Hepatology.

Cirrhosis has a median survival ranging from 2 years for decompensated disease to 12 years for compensated disease, according to one systemic review. Moreover, even compensated cirrhosis incurs “a high burden of physical and psychological symptoms,” which increases as cirrhosis progresses, the update authors noted.

According to another review, there is established evidence outside cirrhosis that palliative care – including comprehensive symptom management, advance care planning, and timely referrals to specialty palliative care and hospice support – has the potential to significantly improve quality of life, end-of-life care, health care costs, coordination among providers, and caregiver outcomes.

However, the update authors noted that there remain few guidelines or guidance statements regarding palliative care in cirrhosis. Hence, the clinical practice update reviews 10 best practices to help clinicians fill this gap.

Providers “from any specialty, within any healthcare setting” can help provide palliative care for patients with cirrhosis, the experts emphasized. This is, in part, because of the growing population with cirrhosis being met with a limited number of palliative care specialists; dealing with this reality can be helped by inviting other providers to learn about and engage in palliative care.

Another best practice statement addressed assessing symptoms “within physical, psychological, social, and spiritual domains related to [patients’] liver disease, its treatment, and prognosis.” This approach is needed because of the complex effects that a life-threatening illness and its symptoms can have on many variables, including loss of independence/identity, financial stress, and impact on personal relationships. A systematic review of symptom prevalence in end-stage liver disease revealed a complex milieu, including pain, muscle cramps, sexual dysfunction, insomnia, and anxiety.

High-quality communication is important in palliative care, including discussion of prognosis and goals of care. Providers specializing in gastroenterology/hepatology should reevaluate prognosis and clarify prognosis and goals of care with patients and caregivers during routine visits and sentinel events, such as new complications, a hospital or intensive care admission, and when transplant eligibility is determined. However, prognostication in cirrhosis can be challenging, the experts noted. The update authors also acknowledged that, while more research is needed to inform practice regarding communicating with patients with serious illness about palliative care and goals of care, there are courses and resources meant to help improve those skills, including those provided by Vital Talk, Respecting Choices, and the Serious Illness Conversation Guide.

Cirrhosis “has physical, mental, and financial consequences” for caregivers, especially when patients have decompensated disease. To support caregivers, clinicians can routinely evaluate their burdens and needs. Tools such as the Caregiver Strain Index are useful and can be administered by ancillary staff. Clinicians also can reach out to primary care and palliative care providers to identify local resources for caregiver support.

“Because lack of time is one of the major barriers to administering palliative care, healthcare providers should consider how they can optimize efficiencies in palliative care delivery,” the experts wrote. Examples include identifying local billing codes, arranging for ancillary staff to screen patients on their palliative care needs, and setting up multidisciplinary teams that work together to deliver palliative care. If access to specialty palliative care is limited, providers can collaborate with local specialist teams to set “clear triggers and pathways for referral.”

Finally, hospice referrals are often delayed for patients with cirrhosis. “Find out your local referral criteria for hospice and what would be required to refer a cirrhosis patient there,” the experts advised. “Healthcare providers caring for patients with cirrhosis should provide timely referral to hospice for patients who have comfort-oriented goals and prognosis of 6 months or less.”

The authors of the clinical practice update received no funding support. They reported having no relevant conflicts of interest.

Antimicrobial resistance is the most common cause of treatment-refractory Helicobacter pylori infection, but before switching antibiotics, clinicians should screen for factors such as treatment nonadherence or inadequate suppression of gastric acid, according to a clinical practice update from the American Gastroenterological Association.

“Inadequate acid suppression is associated with H. pylori eradication failure. The use of high-dose and more potent PPIs, PPIs not metabolized by CYP2C19, or potassium-competitive acid blockers, if available, should be considered in cases of refractory H. pylori infection,” wrote Shailja C. Shah, MD, MPH, of Vanderbilt University Medical Center in Nashville, Tenn., and coauthors Prasad G. Iyer, MD, and Steven F. Moss, MD. . Their report is in Gastroenterology.

H. pylori infection is the most common cause of gastric cancer. Although eradication is widely recommended, it can be challenging because of strain diversity, rising antimicrobial resistance, a dearth of recent head-to-head clinical trials, and sparse epidemiologic and sensitivity data, the experts noted. For this reason, before selecting an eradication regimen, it is vital to thoroughly review a patient’s history of antibiotics – for example, any prior macrolide or fluoroquinolone exposure should preclude the use of clarithromycin- or levofloxacin-based regimens “given the high likelihood of resistance,” the experts wrote. They also advised that clinicians should avoid levofloxacin unless the H. pylori strain is known to be sensitive to it or if population rates of levofloxacin resistance rates are known to be less than 15%. However, amoxicillin, tetracycline, and rifabutin resistance are rare, and these agents “can be considered for subsequent therapies in refractory H. pylori infection.”

A longer antimicrobial regimen (such as 14 vs. 7 days) is more likely to eradicate H. pylori. If first-line bismuth quadruple therapy (such as a PPI plus bismuth, metronidazole, and tetracycline) fails, then second-line options include another bismuth-containing quadruple-agent regimen, or triple therapy with rifabutin or levofloxacin plus high-dose dual PPI therapy and amoxicillin. If patient history contains “penicillin allergy” but does not list anaphylaxis, then penicillin allergy testing can help determine if amoxicillin-based regimens are an option. The authors also note that, when used, amoxicillin should be dosed at 2 g/day in divided doses three to four times per day in order to avoid low trough levels because this might be associated with H. pylori eradication failure. For metronidazole, regardless of in vitro resistance, eradication is more likely if patients receive 1.5-2 g/day, in divided doses, with concomitant bismuth.

Treatment nonadherence contributes to refractory H. pylori infection and may be caused by the complexity of the treatment regimen, high pill burden, and side effects. To improve adherence, the experts advised counseling patients on the rationale for the treatment regimen, the dosing instructions, the importance of completing the full course of therapy, and providing anticipatory guidance regarding common side effects. If a patient adheres to second-line treatment and it still fails, then susceptibility testing is advised before starting another regimen. Depending on the results, options may include levofloxacin-based quadruple therapy, another round of bismuth-based quadruple therapy, a PPI plus amoxicillin and rifabutin, or high-dose PPI therapy plus high-dose amoxicillin (2-3 g/day divided across three to four doses).

Other considerations include how to approach patients and caregivers, particularly the elderly and other vulnerable patients, with shared decision-making to help them weigh the potential benefits of continuing to try to eradicate H. pylori against the risk of possible adverse effects and the “inconvenience of repeated exposure to antibiotics and high-dose acid suppression,” the experts wrote. They also advised tracking rates of eradication success and relevant demographic and clinical data, including patients’ antibiotic history. Publicly sharing aggregated, deidentified results can help other local clinicians select eradication regimens. Finally, the use of probiotics and other adjunctive therapies “should be considered experimental” since these have no clear benefit for treating refractory H. pylori infection.

Dr. Shah was funded by an AGA Research Scholar Award and a Veterans Affairs Career Development Award. She reported having no conflicts of interest. Dr. Iyer and Dr. Moss disclosed ties to Exact Sciences, Pentax Medical, Redhill Biopharma, Phathom, American Molecular Laboratories, and Takeda.

Antimicrobial resistance is the most common cause of treatment-refractory Helicobacter pylori infection, but before switching antibiotics, clinicians should screen for factors such as treatment nonadherence or inadequate suppression of gastric acid, according to a clinical practice update from the American Gastroenterological Association.

“Inadequate acid suppression is associated with H. pylori eradication failure. The use of high-dose and more potent PPIs, PPIs not metabolized by CYP2C19, or potassium-competitive acid blockers, if available, should be considered in cases of refractory H. pylori infection,” wrote Shailja C. Shah, MD, MPH, of Vanderbilt University Medical Center in Nashville, Tenn., and coauthors Prasad G. Iyer, MD, and Steven F. Moss, MD. . Their report is in Gastroenterology.

H. pylori infection is the most common cause of gastric cancer. Although eradication is widely recommended, it can be challenging because of strain diversity, rising antimicrobial resistance, a dearth of recent head-to-head clinical trials, and sparse epidemiologic and sensitivity data, the experts noted. For this reason, before selecting an eradication regimen, it is vital to thoroughly review a patient’s history of antibiotics – for example, any prior macrolide or fluoroquinolone exposure should preclude the use of clarithromycin- or levofloxacin-based regimens “given the high likelihood of resistance,” the experts wrote. They also advised that clinicians should avoid levofloxacin unless the H. pylori strain is known to be sensitive to it or if population rates of levofloxacin resistance rates are known to be less than 15%. However, amoxicillin, tetracycline, and rifabutin resistance are rare, and these agents “can be considered for subsequent therapies in refractory H. pylori infection.”

A longer antimicrobial regimen (such as 14 vs. 7 days) is more likely to eradicate H. pylori. If first-line bismuth quadruple therapy (such as a PPI plus bismuth, metronidazole, and tetracycline) fails, then second-line options include another bismuth-containing quadruple-agent regimen, or triple therapy with rifabutin or levofloxacin plus high-dose dual PPI therapy and amoxicillin. If patient history contains “penicillin allergy” but does not list anaphylaxis, then penicillin allergy testing can help determine if amoxicillin-based regimens are an option. The authors also note that, when used, amoxicillin should be dosed at 2 g/day in divided doses three to four times per day in order to avoid low trough levels because this might be associated with H. pylori eradication failure. For metronidazole, regardless of in vitro resistance, eradication is more likely if patients receive 1.5-2 g/day, in divided doses, with concomitant bismuth.

Treatment nonadherence contributes to refractory H. pylori infection and may be caused by the complexity of the treatment regimen, high pill burden, and side effects. To improve adherence, the experts advised counseling patients on the rationale for the treatment regimen, the dosing instructions, the importance of completing the full course of therapy, and providing anticipatory guidance regarding common side effects. If a patient adheres to second-line treatment and it still fails, then susceptibility testing is advised before starting another regimen. Depending on the results, options may include levofloxacin-based quadruple therapy, another round of bismuth-based quadruple therapy, a PPI plus amoxicillin and rifabutin, or high-dose PPI therapy plus high-dose amoxicillin (2-3 g/day divided across three to four doses).

Other considerations include how to approach patients and caregivers, particularly the elderly and other vulnerable patients, with shared decision-making to help them weigh the potential benefits of continuing to try to eradicate H. pylori against the risk of possible adverse effects and the “inconvenience of repeated exposure to antibiotics and high-dose acid suppression,” the experts wrote. They also advised tracking rates of eradication success and relevant demographic and clinical data, including patients’ antibiotic history. Publicly sharing aggregated, deidentified results can help other local clinicians select eradication regimens. Finally, the use of probiotics and other adjunctive therapies “should be considered experimental” since these have no clear benefit for treating refractory H. pylori infection.

Dr. Shah was funded by an AGA Research Scholar Award and a Veterans Affairs Career Development Award. She reported having no conflicts of interest. Dr. Iyer and Dr. Moss disclosed ties to Exact Sciences, Pentax Medical, Redhill Biopharma, Phathom, American Molecular Laboratories, and Takeda.

Antimicrobial resistance is the most common cause of treatment-refractory Helicobacter pylori infection, but before switching antibiotics, clinicians should screen for factors such as treatment nonadherence or inadequate suppression of gastric acid, according to a clinical practice update from the American Gastroenterological Association.

“Inadequate acid suppression is associated with H. pylori eradication failure. The use of high-dose and more potent PPIs, PPIs not metabolized by CYP2C19, or potassium-competitive acid blockers, if available, should be considered in cases of refractory H. pylori infection,” wrote Shailja C. Shah, MD, MPH, of Vanderbilt University Medical Center in Nashville, Tenn., and coauthors Prasad G. Iyer, MD, and Steven F. Moss, MD. . Their report is in Gastroenterology.

H. pylori infection is the most common cause of gastric cancer. Although eradication is widely recommended, it can be challenging because of strain diversity, rising antimicrobial resistance, a dearth of recent head-to-head clinical trials, and sparse epidemiologic and sensitivity data, the experts noted. For this reason, before selecting an eradication regimen, it is vital to thoroughly review a patient’s history of antibiotics – for example, any prior macrolide or fluoroquinolone exposure should preclude the use of clarithromycin- or levofloxacin-based regimens “given the high likelihood of resistance,” the experts wrote. They also advised that clinicians should avoid levofloxacin unless the H. pylori strain is known to be sensitive to it or if population rates of levofloxacin resistance rates are known to be less than 15%. However, amoxicillin, tetracycline, and rifabutin resistance are rare, and these agents “can be considered for subsequent therapies in refractory H. pylori infection.”

A longer antimicrobial regimen (such as 14 vs. 7 days) is more likely to eradicate H. pylori. If first-line bismuth quadruple therapy (such as a PPI plus bismuth, metronidazole, and tetracycline) fails, then second-line options include another bismuth-containing quadruple-agent regimen, or triple therapy with rifabutin or levofloxacin plus high-dose dual PPI therapy and amoxicillin. If patient history contains “penicillin allergy” but does not list anaphylaxis, then penicillin allergy testing can help determine if amoxicillin-based regimens are an option. The authors also note that, when used, amoxicillin should be dosed at 2 g/day in divided doses three to four times per day in order to avoid low trough levels because this might be associated with H. pylori eradication failure. For metronidazole, regardless of in vitro resistance, eradication is more likely if patients receive 1.5-2 g/day, in divided doses, with concomitant bismuth.

Treatment nonadherence contributes to refractory H. pylori infection and may be caused by the complexity of the treatment regimen, high pill burden, and side effects. To improve adherence, the experts advised counseling patients on the rationale for the treatment regimen, the dosing instructions, the importance of completing the full course of therapy, and providing anticipatory guidance regarding common side effects. If a patient adheres to second-line treatment and it still fails, then susceptibility testing is advised before starting another regimen. Depending on the results, options may include levofloxacin-based quadruple therapy, another round of bismuth-based quadruple therapy, a PPI plus amoxicillin and rifabutin, or high-dose PPI therapy plus high-dose amoxicillin (2-3 g/day divided across three to four doses).

Other considerations include how to approach patients and caregivers, particularly the elderly and other vulnerable patients, with shared decision-making to help them weigh the potential benefits of continuing to try to eradicate H. pylori against the risk of possible adverse effects and the “inconvenience of repeated exposure to antibiotics and high-dose acid suppression,” the experts wrote. They also advised tracking rates of eradication success and relevant demographic and clinical data, including patients’ antibiotic history. Publicly sharing aggregated, deidentified results can help other local clinicians select eradication regimens. Finally, the use of probiotics and other adjunctive therapies “should be considered experimental” since these have no clear benefit for treating refractory H. pylori infection.

Dr. Shah was funded by an AGA Research Scholar Award and a Veterans Affairs Career Development Award. She reported having no conflicts of interest. Dr. Iyer and Dr. Moss disclosed ties to Exact Sciences, Pentax Medical, Redhill Biopharma, Phathom, American Molecular Laboratories, and Takeda.

Offering a combination of colonoscopy and fecal immunochemical testing (FIT), either in sequence or by choice, may significantly increase participation in colorectal cancer (CRC) screening, according to a prospective study involving more than 12,000 individuals in Poland.

Still, greater participation did not lead to significantly higher rates of advanced disease detection, reported lead author Nastazja Dagny Pilonis, MD, of the Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, and colleagues in Gastroenterology.

According to the investigators, screening programs that offer colonoscopy and FIT are more effective than those that offer colonoscopy alone, but an optimal combination protocol has yet to be established, and some parts of the world still rely upon a single diagnostic method.

“In Europe, CRC screening programs often implement only one screening modality: colonoscopy, sigmoidoscopy, or stool testing, depending on the health care provider,” the investigators wrote in Gastroenterology. They noted, however, that national guidelines in the United States recommend strategies that include more than one screening method. “‘One-size-fits-all’ approaches to CRC screening do not result in satisfactory participation” because of behavioral, cultural, and socioeconomic variation among individuals.

To improve understanding of the best ways to improve participation, the investigators conducted a prospective randomized trial, PICCOLINO, via the Polish Colonoscopy Screening Program. In total, 12,485 eligible individuals aged between 55 and 64 years received postal invitations to participate in CRC screening. Individuals were randomized in a 1:1:1 ratio into one of three mailing protocols, each of which involved an initial invitation, and, if needed, a second invitation that offered the following:

• Control group: colonoscopy, with nonresponders receiving the same invitation again
• Sequential group: colonoscopy, with nonresponders or refusers receiving a second invitation that offered FIT
• Choice group: choice between colonoscopy or FIT, with nonresponders receiving the same invitation again

The primary outcome was participation in screening within 18 weeks of enrollment. The secondary outcome was diagnostic yield for either advanced adenoma or CRC.

Out of the three groups, the control group had the lowest participation rate, at 17.5%, compared with 25.8% for the sequential group and 26.5% for the choice group. Multivariable logistic regression showed that individuals in the sequential and choice groups had 64% and 70% higher rates of participation, respectively. Across all groups, age of 60 years or older predicted 12% higher likelihood of participation; in contrast, location more than 40 kilometers from a testing center was associated with an 18% decrease in participation, compared with individuals who lived less than 20 kilometers away.

While the control and sequential groups had similar rates of colonoscopy participation, at 17.5% and 15.9%, respectively (P = .788), this rate was significantly lower, at 8.5%, in the choice group (P = .001). Conversely, the sequential group had a significantly lower rate of FITs than the choice group, at 9.9% versus 17.9%, respectively (P = .001). Among participants with a positive FIT, diagnostic work-up colonoscopies were performed in 70.0% of those in the sequential group and 73.3% in the choice group, “despite active call-recall efforts.”

Across all invited individuals, advanced disease detection rates were similar across groups, at 1.1% for both the control and the sequential group and 1.2% for the choice group. Among those who were actually screened, the control group had a slightly higher diagnostic yield for advanced neoplasia, at 6.5%, compared with 4.2% in the sequential group and 4.4% in the choice group; however, these differences were not statistically significant. In contrast, significantly more adenomas of any kind were detected in the control and sequential groups (5.6% for both) than the choice group (3.9%) (P < .001).

“Although the strategies which included FIT showed higher participation rates than the strategy of offering colonoscopy alone, these strategies did not result in increased detection rates of advanced neoplasia in the intention to screen analysis,” the investigators wrote. “An absolute increase in participation rates of 8%-10% seems insufficient to translate into higher advanced neoplasia detection at the population level.”

Dr. Pilonis and colleagues also suggested that the relatively low rate of diagnostic colonoscopy after positive FIT contributed to the suboptimal diagnostic yield.

“These rates are unsatisfactory taking into account significant call-recall efforts, but are within the range reported in other studies,” they wrote.

They also wrote that their study compared participation and detection between one-time colonoscopy and one-time screening strategies combining colonoscopy and FIT. In acknowledging this, they noted that these approaches have different screening intervals and uptake over time: “FIT has been shown to achieve higher participation rates than colonoscopy for one time screening, but its uptake over several rounds may not be superior to one time colonoscopy.” Furthermore, detection rates of the sequential or choice strategies for advanced disease may rise over time with further implementation, so the one-time screening may not be sufficient to reveal what could become significant differences.

The study was funded by the Polish Ministry of Health, the Polish Foundation of Gastroenterology, and the Centre of Postgraduate Medical Education in Warsaw. FITs, materials, and reagents were provided by Eiken Chemical. The investigators disclosed relationships with Boston Scientific, AbbVie, Olympus, and others.

Offering a combination of colonoscopy and fecal immunochemical testing (FIT), either in sequence or by choice, may significantly increase participation in colorectal cancer (CRC) screening, according to a prospective study involving more than 12,000 individuals in Poland.

Still, greater participation did not lead to significantly higher rates of advanced disease detection, reported lead author Nastazja Dagny Pilonis, MD, of the Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, and colleagues in Gastroenterology.

According to the investigators, screening programs that offer colonoscopy and FIT are more effective than those that offer colonoscopy alone, but an optimal combination protocol has yet to be established, and some parts of the world still rely upon a single diagnostic method.

“In Europe, CRC screening programs often implement only one screening modality: colonoscopy, sigmoidoscopy, or stool testing, depending on the health care provider,” the investigators wrote in Gastroenterology. They noted, however, that national guidelines in the United States recommend strategies that include more than one screening method. “‘One-size-fits-all’ approaches to CRC screening do not result in satisfactory participation” because of behavioral, cultural, and socioeconomic variation among individuals.

To improve understanding of the best ways to improve participation, the investigators conducted a prospective randomized trial, PICCOLINO, via the Polish Colonoscopy Screening Program. In total, 12,485 eligible individuals aged between 55 and 64 years received postal invitations to participate in CRC screening. Individuals were randomized in a 1:1:1 ratio into one of three mailing protocols, each of which involved an initial invitation, and, if needed, a second invitation that offered the following:

• Control group: colonoscopy, with nonresponders receiving the same invitation again
• Sequential group: colonoscopy, with nonresponders or refusers receiving a second invitation that offered FIT
• Choice group: choice between colonoscopy or FIT, with nonresponders receiving the same invitation again

The primary outcome was participation in screening within 18 weeks of enrollment. The secondary outcome was diagnostic yield for either advanced adenoma or CRC.

Out of the three groups, the control group had the lowest participation rate, at 17.5%, compared with 25.8% for the sequential group and 26.5% for the choice group. Multivariable logistic regression showed that individuals in the sequential and choice groups had 64% and 70% higher rates of participation, respectively. Across all groups, age of 60 years or older predicted 12% higher likelihood of participation; in contrast, location more than 40 kilometers from a testing center was associated with an 18% decrease in participation, compared with individuals who lived less than 20 kilometers away.

While the control and sequential groups had similar rates of colonoscopy participation, at 17.5% and 15.9%, respectively (P = .788), this rate was significantly lower, at 8.5%, in the choice group (P = .001). Conversely, the sequential group had a significantly lower rate of FITs than the choice group, at 9.9% versus 17.9%, respectively (P = .001). Among participants with a positive FIT, diagnostic work-up colonoscopies were performed in 70.0% of those in the sequential group and 73.3% in the choice group, “despite active call-recall efforts.”

Across all invited individuals, advanced disease detection rates were similar across groups, at 1.1% for both the control and the sequential group and 1.2% for the choice group. Among those who were actually screened, the control group had a slightly higher diagnostic yield for advanced neoplasia, at 6.5%, compared with 4.2% in the sequential group and 4.4% in the choice group; however, these differences were not statistically significant. In contrast, significantly more adenomas of any kind were detected in the control and sequential groups (5.6% for both) than the choice group (3.9%) (P < .001).

“Although the strategies which included FIT showed higher participation rates than the strategy of offering colonoscopy alone, these strategies did not result in increased detection rates of advanced neoplasia in the intention to screen analysis,” the investigators wrote. “An absolute increase in participation rates of 8%-10% seems insufficient to translate into higher advanced neoplasia detection at the population level.”

Dr. Pilonis and colleagues also suggested that the relatively low rate of diagnostic colonoscopy after positive FIT contributed to the suboptimal diagnostic yield.

“These rates are unsatisfactory taking into account significant call-recall efforts, but are within the range reported in other studies,” they wrote.

They also wrote that their study compared participation and detection between one-time colonoscopy and one-time screening strategies combining colonoscopy and FIT. In acknowledging this, they noted that these approaches have different screening intervals and uptake over time: “FIT has been shown to achieve higher participation rates than colonoscopy for one time screening, but its uptake over several rounds may not be superior to one time colonoscopy.” Furthermore, detection rates of the sequential or choice strategies for advanced disease may rise over time with further implementation, so the one-time screening may not be sufficient to reveal what could become significant differences.

The study was funded by the Polish Ministry of Health, the Polish Foundation of Gastroenterology, and the Centre of Postgraduate Medical Education in Warsaw. FITs, materials, and reagents were provided by Eiken Chemical. The investigators disclosed relationships with Boston Scientific, AbbVie, Olympus, and others.

Offering a combination of colonoscopy and fecal immunochemical testing (FIT), either in sequence or by choice, may significantly increase participation in colorectal cancer (CRC) screening, according to a prospective study involving more than 12,000 individuals in Poland.

Still, greater participation did not lead to significantly higher rates of advanced disease detection, reported lead author Nastazja Dagny Pilonis, MD, of the Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, and colleagues in Gastroenterology.

According to the investigators, screening programs that offer colonoscopy and FIT are more effective than those that offer colonoscopy alone, but an optimal combination protocol has yet to be established, and some parts of the world still rely upon a single diagnostic method.

“In Europe, CRC screening programs often implement only one screening modality: colonoscopy, sigmoidoscopy, or stool testing, depending on the health care provider,” the investigators wrote in Gastroenterology. They noted, however, that national guidelines in the United States recommend strategies that include more than one screening method. “‘One-size-fits-all’ approaches to CRC screening do not result in satisfactory participation” because of behavioral, cultural, and socioeconomic variation among individuals.

To improve understanding of the best ways to improve participation, the investigators conducted a prospective randomized trial, PICCOLINO, via the Polish Colonoscopy Screening Program. In total, 12,485 eligible individuals aged between 55 and 64 years received postal invitations to participate in CRC screening. Individuals were randomized in a 1:1:1 ratio into one of three mailing protocols, each of which involved an initial invitation, and, if needed, a second invitation that offered the following:

• Control group: colonoscopy, with nonresponders receiving the same invitation again
• Sequential group: colonoscopy, with nonresponders or refusers receiving a second invitation that offered FIT
• Choice group: choice between colonoscopy or FIT, with nonresponders receiving the same invitation again

The primary outcome was participation in screening within 18 weeks of enrollment. The secondary outcome was diagnostic yield for either advanced adenoma or CRC.

Out of the three groups, the control group had the lowest participation rate, at 17.5%, compared with 25.8% for the sequential group and 26.5% for the choice group. Multivariable logistic regression showed that individuals in the sequential and choice groups had 64% and 70% higher rates of participation, respectively. Across all groups, age of 60 years or older predicted 12% higher likelihood of participation; in contrast, location more than 40 kilometers from a testing center was associated with an 18% decrease in participation, compared with individuals who lived less than 20 kilometers away.

While the control and sequential groups had similar rates of colonoscopy participation, at 17.5% and 15.9%, respectively (P = .788), this rate was significantly lower, at 8.5%, in the choice group (P = .001). Conversely, the sequential group had a significantly lower rate of FITs than the choice group, at 9.9% versus 17.9%, respectively (P = .001). Among participants with a positive FIT, diagnostic work-up colonoscopies were performed in 70.0% of those in the sequential group and 73.3% in the choice group, “despite active call-recall efforts.”

Across all invited individuals, advanced disease detection rates were similar across groups, at 1.1% for both the control and the sequential group and 1.2% for the choice group. Among those who were actually screened, the control group had a slightly higher diagnostic yield for advanced neoplasia, at 6.5%, compared with 4.2% in the sequential group and 4.4% in the choice group; however, these differences were not statistically significant. In contrast, significantly more adenomas of any kind were detected in the control and sequential groups (5.6% for both) than the choice group (3.9%) (P < .001).

“Although the strategies which included FIT showed higher participation rates than the strategy of offering colonoscopy alone, these strategies did not result in increased detection rates of advanced neoplasia in the intention to screen analysis,” the investigators wrote. “An absolute increase in participation rates of 8%-10% seems insufficient to translate into higher advanced neoplasia detection at the population level.”

Dr. Pilonis and colleagues also suggested that the relatively low rate of diagnostic colonoscopy after positive FIT contributed to the suboptimal diagnostic yield.

“These rates are unsatisfactory taking into account significant call-recall efforts, but are within the range reported in other studies,” they wrote.

They also wrote that their study compared participation and detection between one-time colonoscopy and one-time screening strategies combining colonoscopy and FIT. In acknowledging this, they noted that these approaches have different screening intervals and uptake over time: “FIT has been shown to achieve higher participation rates than colonoscopy for one time screening, but its uptake over several rounds may not be superior to one time colonoscopy.” Furthermore, detection rates of the sequential or choice strategies for advanced disease may rise over time with further implementation, so the one-time screening may not be sufficient to reveal what could become significant differences.

The study was funded by the Polish Ministry of Health, the Polish Foundation of Gastroenterology, and the Centre of Postgraduate Medical Education in Warsaw. FITs, materials, and reagents were provided by Eiken Chemical. The investigators disclosed relationships with Boston Scientific, AbbVie, Olympus, and others.

Nanoparticle encapsulation may enable targeting of aberrant glucose metabolism in hepatocellular carcinoma (HCC), potentially amplifying the effects of existing therapies and overcoming resistance mechanisms, according to investigators.

In a preclinical trial involving cell lines, xenograft tumors, and mouse models, encapsulated 2-deoxy-D-glucose (2DG) nanoparticles enhanced the antineoplastic effects of sorafenib and checkpoint inhibitors and suppressed anti-programmed cell death protein 1 (PD1)–resistant tumors, reported lead author Kyo Sasaki, PhD, of Kyushu University in Fukuoka, Japan, and colleagues.

As a glycolysis inhibitor, 2DG acts against the Warburg effect, a cancer immune-resistance mechanism “in which a substantial amount of pyruvate is reduced to lactic acid instead of being directed into mitochondria,” the investigators wrote. Their report is in Cellular and Molecular Gastroenterology and Hepatology.

But this isn’t new information, and Dr. Sasaki and colleagues weren’t the first to address the Warburg effect with 2DG; two clinical trials reported signs of efficacy in patients with solid tumors, one in 2010 and the other in 2013.

“However, 2DG does not seem to have a significant effect on tumor growth at a dose that does not induce serious adverse effects,” wrote Dr. Sasaki and colleagues. “These results suggest a need to develop an efficient drug delivery system for 2DG.”

The investigators turned to nanoparticles, which accumulate in tumor tissue more than healthy tissue, thereby limiting off-target toxicity. Specifically, they encapsulated 2DG in nanoparticles of poly(lactic-co-glycolic acid) (PLGA), a Food and Drug Administration–approved biodegradable polymer.

After characterizing the physical properties of the encapsulated 2DG nanoparticles (2DG-PLGA-NPs), and observing tumor localization in nude mice with xenograft liver tumors, the investigators assessed cytotoxic effects.

Treatment resulted in “significant growth reduction” of not only xenograft liver tumors, but also xenograft renal, colon, and pancreatic tumors, “indicating the potential antitumor effects of this method against various tumors.” Furthermore, mice treated with encapsulated 2DG nanoparticles had significantly less weight loss compared with those receiving conventional 2DG, suggesting a reduction in 2DG-related adverse effects.

Additional experiments involving two immunocompetent mouse models with multiple large liver tumors added data to support to the relative efficacy of encapsulated versus nonencapsulated 2DG. Both mouse models had significant reductions in liver tumors when treated with 2DG-PLGA-NPs; in contrast, treatment with 2DG alone reduced tumor number in only one of the two mouse models and to a lesser degree than treatment with 2DG nanoparticles.

Further in vivo and ex vivo testing revealed that encapsulated 2DG nanoparticles exerted their cytotoxic effects via endoplasmic reticulum stress, oxidative stress, and inactivation of mTOR. Simultaneously, treatment was associated with CD8+ T-cell migration into tumor tissue via increased glucose uptake and IFN-gamma production in CD8+ T cells, reduced lactate production in tumors, and increased production of CXCL9/CXCL10/CXCL11 in both the tumors and CD8+ T cells.

According to the investigators, these findings suggested that 2DG-PLGA-NPs might upregulate PD-1 positive T cells in tumors, thereby enhancing the effects of a checkpoint inhibitor. Indeed, when syngeneic mice with anti-PD-1–resistant tumors were treated with encapsulated 2DG nanoparticles, the investigators observed significant reductions in tumor growth, compared with treatment using an isotype control, PLGA alone, or an anti-PD-1 antibody. And in nude mice with xenograft tumors, combination therapy with 2DG-PLGA-NPs and sorafenib significantly reduced tumor growth, compared with no treatment, 2DG, PLGA, or PLGA with sorafenib.

“2DG-PLGA-NPs amplified the antitumor effect of anti-PD1 or sorafenib, and showed an antitumor effect against anti-PD1–resistant tumors,” the investigators wrote.

Dr. Sasaki and colleagues also noted that encapsulated 2DG nanoparticles did not accumulate in nontumorous cirrhotic hepatocytes, which suggests that treatment would be safe for patients with chronic liver diseases.

“Another practical concern is the extent to which 2DG is effectively taken up by HCC cells,” the investigators wrote.

PET showed that the hepatic accumulation rate of F-2-fluoro-2-deoxyglucose (F-FDG), a radioactive tracer of 2DG, was 50% in well-differentiated HCC, and “much higher” in sorafenib-resistant HCC cells and poorly and moderately differentiated HCC cells.

“Thus, 2DG-PLGA-NPs are expected to be good therapeutic agent candidates for patients with advanced HCC,” the investigators concluded.

The investigators disclosed no conflicts of interest. Some authors received grants from the Japan Society for the Promotion of Science.

Nanoparticle encapsulation may enable targeting of aberrant glucose metabolism in hepatocellular carcinoma (HCC), potentially amplifying the effects of existing therapies and overcoming resistance mechanisms, according to investigators.

In a preclinical trial involving cell lines, xenograft tumors, and mouse models, encapsulated 2-deoxy-D-glucose (2DG) nanoparticles enhanced the antineoplastic effects of sorafenib and checkpoint inhibitors and suppressed anti-programmed cell death protein 1 (PD1)–resistant tumors, reported lead author Kyo Sasaki, PhD, of Kyushu University in Fukuoka, Japan, and colleagues.

As a glycolysis inhibitor, 2DG acts against the Warburg effect, a cancer immune-resistance mechanism “in which a substantial amount of pyruvate is reduced to lactic acid instead of being directed into mitochondria,” the investigators wrote. Their report is in Cellular and Molecular Gastroenterology and Hepatology.

But this isn’t new information, and Dr. Sasaki and colleagues weren’t the first to address the Warburg effect with 2DG; two clinical trials reported signs of efficacy in patients with solid tumors, one in 2010 and the other in 2013.

“However, 2DG does not seem to have a significant effect on tumor growth at a dose that does not induce serious adverse effects,” wrote Dr. Sasaki and colleagues. “These results suggest a need to develop an efficient drug delivery system for 2DG.”

The investigators turned to nanoparticles, which accumulate in tumor tissue more than healthy tissue, thereby limiting off-target toxicity. Specifically, they encapsulated 2DG in nanoparticles of poly(lactic-co-glycolic acid) (PLGA), a Food and Drug Administration–approved biodegradable polymer.

After characterizing the physical properties of the encapsulated 2DG nanoparticles (2DG-PLGA-NPs), and observing tumor localization in nude mice with xenograft liver tumors, the investigators assessed cytotoxic effects.

Treatment resulted in “significant growth reduction” of not only xenograft liver tumors, but also xenograft renal, colon, and pancreatic tumors, “indicating the potential antitumor effects of this method against various tumors.” Furthermore, mice treated with encapsulated 2DG nanoparticles had significantly less weight loss compared with those receiving conventional 2DG, suggesting a reduction in 2DG-related adverse effects.

Additional experiments involving two immunocompetent mouse models with multiple large liver tumors added data to support to the relative efficacy of encapsulated versus nonencapsulated 2DG. Both mouse models had significant reductions in liver tumors when treated with 2DG-PLGA-NPs; in contrast, treatment with 2DG alone reduced tumor number in only one of the two mouse models and to a lesser degree than treatment with 2DG nanoparticles.

Further in vivo and ex vivo testing revealed that encapsulated 2DG nanoparticles exerted their cytotoxic effects via endoplasmic reticulum stress, oxidative stress, and inactivation of mTOR. Simultaneously, treatment was associated with CD8+ T-cell migration into tumor tissue via increased glucose uptake and IFN-gamma production in CD8+ T cells, reduced lactate production in tumors, and increased production of CXCL9/CXCL10/CXCL11 in both the tumors and CD8+ T cells.

According to the investigators, these findings suggested that 2DG-PLGA-NPs might upregulate PD-1 positive T cells in tumors, thereby enhancing the effects of a checkpoint inhibitor. Indeed, when syngeneic mice with anti-PD-1–resistant tumors were treated with encapsulated 2DG nanoparticles, the investigators observed significant reductions in tumor growth, compared with treatment using an isotype control, PLGA alone, or an anti-PD-1 antibody. And in nude mice with xenograft tumors, combination therapy with 2DG-PLGA-NPs and sorafenib significantly reduced tumor growth, compared with no treatment, 2DG, PLGA, or PLGA with sorafenib.

“2DG-PLGA-NPs amplified the antitumor effect of anti-PD1 or sorafenib, and showed an antitumor effect against anti-PD1–resistant tumors,” the investigators wrote.

Dr. Sasaki and colleagues also noted that encapsulated 2DG nanoparticles did not accumulate in nontumorous cirrhotic hepatocytes, which suggests that treatment would be safe for patients with chronic liver diseases.

“Another practical concern is the extent to which 2DG is effectively taken up by HCC cells,” the investigators wrote.

PET showed that the hepatic accumulation rate of F-2-fluoro-2-deoxyglucose (F-FDG), a radioactive tracer of 2DG, was 50% in well-differentiated HCC, and “much higher” in sorafenib-resistant HCC cells and poorly and moderately differentiated HCC cells.

“Thus, 2DG-PLGA-NPs are expected to be good therapeutic agent candidates for patients with advanced HCC,” the investigators concluded.

The investigators disclosed no conflicts of interest. Some authors received grants from the Japan Society for the Promotion of Science.

Nanoparticle encapsulation may enable targeting of aberrant glucose metabolism in hepatocellular carcinoma (HCC), potentially amplifying the effects of existing therapies and overcoming resistance mechanisms, according to investigators.

In a preclinical trial involving cell lines, xenograft tumors, and mouse models, encapsulated 2-deoxy-D-glucose (2DG) nanoparticles enhanced the antineoplastic effects of sorafenib and checkpoint inhibitors and suppressed anti-programmed cell death protein 1 (PD1)–resistant tumors, reported lead author Kyo Sasaki, PhD, of Kyushu University in Fukuoka, Japan, and colleagues.

As a glycolysis inhibitor, 2DG acts against the Warburg effect, a cancer immune-resistance mechanism “in which a substantial amount of pyruvate is reduced to lactic acid instead of being directed into mitochondria,” the investigators wrote. Their report is in Cellular and Molecular Gastroenterology and Hepatology.

But this isn’t new information, and Dr. Sasaki and colleagues weren’t the first to address the Warburg effect with 2DG; two clinical trials reported signs of efficacy in patients with solid tumors, one in 2010 and the other in 2013.

“However, 2DG does not seem to have a significant effect on tumor growth at a dose that does not induce serious adverse effects,” wrote Dr. Sasaki and colleagues. “These results suggest a need to develop an efficient drug delivery system for 2DG.”

The investigators turned to nanoparticles, which accumulate in tumor tissue more than healthy tissue, thereby limiting off-target toxicity. Specifically, they encapsulated 2DG in nanoparticles of poly(lactic-co-glycolic acid) (PLGA), a Food and Drug Administration–approved biodegradable polymer.

After characterizing the physical properties of the encapsulated 2DG nanoparticles (2DG-PLGA-NPs), and observing tumor localization in nude mice with xenograft liver tumors, the investigators assessed cytotoxic effects.

Treatment resulted in “significant growth reduction” of not only xenograft liver tumors, but also xenograft renal, colon, and pancreatic tumors, “indicating the potential antitumor effects of this method against various tumors.” Furthermore, mice treated with encapsulated 2DG nanoparticles had significantly less weight loss compared with those receiving conventional 2DG, suggesting a reduction in 2DG-related adverse effects.

Additional experiments involving two immunocompetent mouse models with multiple large liver tumors added data to support to the relative efficacy of encapsulated versus nonencapsulated 2DG. Both mouse models had significant reductions in liver tumors when treated with 2DG-PLGA-NPs; in contrast, treatment with 2DG alone reduced tumor number in only one of the two mouse models and to a lesser degree than treatment with 2DG nanoparticles.

Further in vivo and ex vivo testing revealed that encapsulated 2DG nanoparticles exerted their cytotoxic effects via endoplasmic reticulum stress, oxidative stress, and inactivation of mTOR. Simultaneously, treatment was associated with CD8+ T-cell migration into tumor tissue via increased glucose uptake and IFN-gamma production in CD8+ T cells, reduced lactate production in tumors, and increased production of CXCL9/CXCL10/CXCL11 in both the tumors and CD8+ T cells.

According to the investigators, these findings suggested that 2DG-PLGA-NPs might upregulate PD-1 positive T cells in tumors, thereby enhancing the effects of a checkpoint inhibitor. Indeed, when syngeneic mice with anti-PD-1–resistant tumors were treated with encapsulated 2DG nanoparticles, the investigators observed significant reductions in tumor growth, compared with treatment using an isotype control, PLGA alone, or an anti-PD-1 antibody. And in nude mice with xenograft tumors, combination therapy with 2DG-PLGA-NPs and sorafenib significantly reduced tumor growth, compared with no treatment, 2DG, PLGA, or PLGA with sorafenib.

“2DG-PLGA-NPs amplified the antitumor effect of anti-PD1 or sorafenib, and showed an antitumor effect against anti-PD1–resistant tumors,” the investigators wrote.

Dr. Sasaki and colleagues also noted that encapsulated 2DG nanoparticles did not accumulate in nontumorous cirrhotic hepatocytes, which suggests that treatment would be safe for patients with chronic liver diseases.

“Another practical concern is the extent to which 2DG is effectively taken up by HCC cells,” the investigators wrote.

PET showed that the hepatic accumulation rate of F-2-fluoro-2-deoxyglucose (F-FDG), a radioactive tracer of 2DG, was 50% in well-differentiated HCC, and “much higher” in sorafenib-resistant HCC cells and poorly and moderately differentiated HCC cells.

“Thus, 2DG-PLGA-NPs are expected to be good therapeutic agent candidates for patients with advanced HCC,” the investigators concluded.

The investigators disclosed no conflicts of interest. Some authors received grants from the Japan Society for the Promotion of Science.

Obesity, a risk factor for nonalcoholic fatty liver disease (NAFLD) and a prevalent comorbidity among people with cirrhosis of all etiologies, is associated with a number of untoward health outcomes, and weight loss is an important goal, according to a clinical practice update from the American Gastroenterological Association. According to one study cited in the update, approximately 30% of patients with cirrhosis have comorbid obesity, and this figure may increase even further as the epidemic of NAFLD progresses.

For obese patients with cirrhosis, weight loss “is an important therapeutic goal” because obesity heightens risks of portal vein thrombosis, portal hypertension, hepatocellular carcinoma, liver failure in acute on chronic liver disease, and other concerns. Despite no longer being an absolute contraindication, obesity can also complicate liver transplantation considerations, Heather Patton, MD, of the Veterans Affairs San Diego Healthcare System and associates wrote in Clinical Gastroenterology and Hepatology. Consideration of individuals with cirrhosis, however, requires careful scrutiny of surgical candidacy, appropriate resources for care of patients with advanced liver disease, and a high-volume bariatric surgical center given the inherent risks of surgical procedures in this patient population.

For patients with cirrhosis and obesity, laparoscopic sleeve gastrectomy is probably the best option for bariatric surgery because it preserves endoscopic access to the biliary tree, facilitates gradual weight loss, and does not cause malabsorption, according to the update.

Clinicians and patients should time bariatric surgery based on liver disease stage – for patients with decompensated disease, surgery should be performed only at the same time as or after liver transplantation, the experts wrote. Clinicians should also evaluate candidacy for liver transplantation before bariatric surgery “so that patients who are ineligible for transplant (and their families) have a clear understanding of this, avoiding the need for the medical team to address this issue urgently if the patient’s condition deteriorates postoperatively.”

One review suggested that bariatric surgery is “the most effective and durable” means of weight loss, according to the authors of the update; however, another review suggested increased surgical risk for bariatric surgery among patients with cirrhosis, so the update’s authors advised individualized risk-benefit assessments. These assessments are made even more complicated by scarcity of relevant randomized trial data, so the experts identified PubMed-indexed, peer-reviewed articles published between 2000 and 2020 and used these to make 10 best practice advice statements for bariatric surgery in obese patients with cirrhosis.

The surgical, anesthesia, and medical teams must be well versed in assessing and operating on patients with portal hypertension and cirrhosis and in managing these patients postoperatively, the experts wrote. The preoperative assessment should include cirrhosis status (compensated versus decompensated), the presence and severity of sarcopenia, ascites, and portal hypertension, and candidacy for liver transplantation. It is vital to check for clinically significant portal hypertension (CSPH) because endoscopic devices should not be used in patients with gastric and/or esophageal varices. To do so, upper endoscopy and cross-sectional imaging are advised, pending better data on noninvasive assessment methods. For patients without CSPH, endoscopic bariatric treatment can be somewhat less effective for weight loss but also might be less likely to lead to postoperative complications. However, head-to-head and long-term safety data are not yet available.

The experts also noted that bariatric surgery increases the effects (blood levels) of alcohol and can increase patients’ risk for developing an alcohol use disorder. Therefore, clinicians should carefully the history of alcohol use and repeatedly educate patients about the risks of consuming alcohol after bariatric surgery. According to a study from 2012 and a review from 2015, male sex, younger age, less social support, and regular or “problematic” alcohol use before bariatric surgery heighten the risk for developing an alcohol use disorder afterward, the experts noted.

Funding sources included the Robert H. Yauk Charitable Trust Gift for Liver Transplant Research 2017-2020 and Regenerative Medicine for Prevention of Post-Transplant Biliary Complications. The authors reported having no conflicts of interest.

This article was updated Feb. 23, 2021.

Obesity, a risk factor for nonalcoholic fatty liver disease (NAFLD) and a prevalent comorbidity among people with cirrhosis of all etiologies, is associated with a number of untoward health outcomes, and weight loss is an important goal, according to a clinical practice update from the American Gastroenterological Association. According to one study cited in the update, approximately 30% of patients with cirrhosis have comorbid obesity, and this figure may increase even further as the epidemic of NAFLD progresses.

For obese patients with cirrhosis, weight loss “is an important therapeutic goal” because obesity heightens risks of portal vein thrombosis, portal hypertension, hepatocellular carcinoma, liver failure in acute on chronic liver disease, and other concerns. Despite no longer being an absolute contraindication, obesity can also complicate liver transplantation considerations, Heather Patton, MD, of the Veterans Affairs San Diego Healthcare System and associates wrote in Clinical Gastroenterology and Hepatology. Consideration of individuals with cirrhosis, however, requires careful scrutiny of surgical candidacy, appropriate resources for care of patients with advanced liver disease, and a high-volume bariatric surgical center given the inherent risks of surgical procedures in this patient population.

For patients with cirrhosis and obesity, laparoscopic sleeve gastrectomy is probably the best option for bariatric surgery because it preserves endoscopic access to the biliary tree, facilitates gradual weight loss, and does not cause malabsorption, according to the update.

Clinicians and patients should time bariatric surgery based on liver disease stage – for patients with decompensated disease, surgery should be performed only at the same time as or after liver transplantation, the experts wrote. Clinicians should also evaluate candidacy for liver transplantation before bariatric surgery “so that patients who are ineligible for transplant (and their families) have a clear understanding of this, avoiding the need for the medical team to address this issue urgently if the patient’s condition deteriorates postoperatively.”

One review suggested that bariatric surgery is “the most effective and durable” means of weight loss, according to the authors of the update; however, another review suggested increased surgical risk for bariatric surgery among patients with cirrhosis, so the update’s authors advised individualized risk-benefit assessments. These assessments are made even more complicated by scarcity of relevant randomized trial data, so the experts identified PubMed-indexed, peer-reviewed articles published between 2000 and 2020 and used these to make 10 best practice advice statements for bariatric surgery in obese patients with cirrhosis.

The surgical, anesthesia, and medical teams must be well versed in assessing and operating on patients with portal hypertension and cirrhosis and in managing these patients postoperatively, the experts wrote. The preoperative assessment should include cirrhosis status (compensated versus decompensated), the presence and severity of sarcopenia, ascites, and portal hypertension, and candidacy for liver transplantation. It is vital to check for clinically significant portal hypertension (CSPH) because endoscopic devices should not be used in patients with gastric and/or esophageal varices. To do so, upper endoscopy and cross-sectional imaging are advised, pending better data on noninvasive assessment methods. For patients without CSPH, endoscopic bariatric treatment can be somewhat less effective for weight loss but also might be less likely to lead to postoperative complications. However, head-to-head and long-term safety data are not yet available.

The experts also noted that bariatric surgery increases the effects (blood levels) of alcohol and can increase patients’ risk for developing an alcohol use disorder. Therefore, clinicians should carefully the history of alcohol use and repeatedly educate patients about the risks of consuming alcohol after bariatric surgery. According to a study from 2012 and a review from 2015, male sex, younger age, less social support, and regular or “problematic” alcohol use before bariatric surgery heighten the risk for developing an alcohol use disorder afterward, the experts noted.

Funding sources included the Robert H. Yauk Charitable Trust Gift for Liver Transplant Research 2017-2020 and Regenerative Medicine for Prevention of Post-Transplant Biliary Complications. The authors reported having no conflicts of interest.

This article was updated Feb. 23, 2021.

Obesity, a risk factor for nonalcoholic fatty liver disease (NAFLD) and a prevalent comorbidity among people with cirrhosis of all etiologies, is associated with a number of untoward health outcomes, and weight loss is an important goal, according to a clinical practice update from the American Gastroenterological Association. According to one study cited in the update, approximately 30% of patients with cirrhosis have comorbid obesity, and this figure may increase even further as the epidemic of NAFLD progresses.

For obese patients with cirrhosis, weight loss “is an important therapeutic goal” because obesity heightens risks of portal vein thrombosis, portal hypertension, hepatocellular carcinoma, liver failure in acute on chronic liver disease, and other concerns. Despite no longer being an absolute contraindication, obesity can also complicate liver transplantation considerations, Heather Patton, MD, of the Veterans Affairs San Diego Healthcare System and associates wrote in Clinical Gastroenterology and Hepatology. Consideration of individuals with cirrhosis, however, requires careful scrutiny of surgical candidacy, appropriate resources for care of patients with advanced liver disease, and a high-volume bariatric surgical center given the inherent risks of surgical procedures in this patient population.

For patients with cirrhosis and obesity, laparoscopic sleeve gastrectomy is probably the best option for bariatric surgery because it preserves endoscopic access to the biliary tree, facilitates gradual weight loss, and does not cause malabsorption, according to the update.

Clinicians and patients should time bariatric surgery based on liver disease stage – for patients with decompensated disease, surgery should be performed only at the same time as or after liver transplantation, the experts wrote. Clinicians should also evaluate candidacy for liver transplantation before bariatric surgery “so that patients who are ineligible for transplant (and their families) have a clear understanding of this, avoiding the need for the medical team to address this issue urgently if the patient’s condition deteriorates postoperatively.”

One review suggested that bariatric surgery is “the most effective and durable” means of weight loss, according to the authors of the update; however, another review suggested increased surgical risk for bariatric surgery among patients with cirrhosis, so the update’s authors advised individualized risk-benefit assessments. These assessments are made even more complicated by scarcity of relevant randomized trial data, so the experts identified PubMed-indexed, peer-reviewed articles published between 2000 and 2020 and used these to make 10 best practice advice statements for bariatric surgery in obese patients with cirrhosis.

The surgical, anesthesia, and medical teams must be well versed in assessing and operating on patients with portal hypertension and cirrhosis and in managing these patients postoperatively, the experts wrote. The preoperative assessment should include cirrhosis status (compensated versus decompensated), the presence and severity of sarcopenia, ascites, and portal hypertension, and candidacy for liver transplantation. It is vital to check for clinically significant portal hypertension (CSPH) because endoscopic devices should not be used in patients with gastric and/or esophageal varices. To do so, upper endoscopy and cross-sectional imaging are advised, pending better data on noninvasive assessment methods. For patients without CSPH, endoscopic bariatric treatment can be somewhat less effective for weight loss but also might be less likely to lead to postoperative complications. However, head-to-head and long-term safety data are not yet available.

The experts also noted that bariatric surgery increases the effects (blood levels) of alcohol and can increase patients’ risk for developing an alcohol use disorder. Therefore, clinicians should carefully the history of alcohol use and repeatedly educate patients about the risks of consuming alcohol after bariatric surgery. According to a study from 2012 and a review from 2015, male sex, younger age, less social support, and regular or “problematic” alcohol use before bariatric surgery heighten the risk for developing an alcohol use disorder afterward, the experts noted.

Funding sources included the Robert H. Yauk Charitable Trust Gift for Liver Transplant Research 2017-2020 and Regenerative Medicine for Prevention of Post-Transplant Biliary Complications. The authors reported having no conflicts of interest.

This article was updated Feb. 23, 2021.