User login
Researchers are conducting phase 2 trials to find out.
Anthony D. Sung, MD, of Duke University, Durham, N.C., described this research to David H. Henry, MD, of Penn Medicine in Philadelphia, host of the Blood & Cancer podcast.
On the Nov. 12 episode of Blood & Cancer, Dr. Sung outlined the process of receiving post-HSCT care at home and discussed Duke’s clinical trials assessing the impact of home care on costs, quality of life, the microbiome, graft-versus-host disease (GVHD), and other outcomes. The following transcript of that discussion has been edited for length and clarity.
David Henry, MD: Welcome to this podcast. We’re delighted to have you listening today because we’re going to be speaking with Dr. Anthony Sung from Duke University, where he is assistant professor of medicine in the division of hematologic malignancies and cellular therapies.
So let’s get right into it. I’m a generalist at Pennsylvania Hospital in Philadelphia, where we do auto [autologous] transplants at the main university hospital, autos and allos [allogeneic], and these patients are in [hospital] anywhere from a little bit to a long time. And I’ve often thought to try and do some of this as outpatient. But I think you have a project, which I’m going to ask you to describe, where you try and do most [treatment] outpatient. So tell me what this project is all about, and we’ll skip through how it works.
Anthony Sung, MD: Absolutely. So this is focused on both autologous as well as allogeneic stem cell transplant patients at Duke and a few other centers around the country. Duke University has actually had a long history of an outpatient transplant program. This program is based in a day hospital, which is basically like a high-functioning clinic that’s open 7 days a week. Patients can come into the hospital and receive blood transfusions, IV infusions, and any other therapies that they would need as part of their stem cell transplant treatment in the outpatient setting, returning to their home or to a furnished apartment, temporary lodging, while they’re receiving their care.
What we have done, however, is to take this a step further and deliver care within the patient’s own home. In a sense, we’re returning to an older form of medicine where doctors would make house calls. Within our home-transplant program, instead of the patients having to be in the hospital or instead of having to come back and forth to the outpatient hospital every day, which places additional stresses and strains upon them, our providers will make house calls to the patient’s homes, will draw their labs right there, do a history and physical exam, assess and attend to any of the needs that they have.
Then in the afternoon, the providers will return, have the labs run in the hospital, as they would normally do, a CBC, CMP [comprehensive metabolic panel], and so forth. And then a nurse would return to the patient’s home if needed to deliver any interventions, such as blood transfusions, intravenous fluids, or electrolytes, right there in the comfort of the patient’s own home.
Dr. Henry: So let’s then take it through what happens. Say I am a patient with myeloma. I’ve had various therapies, and it’s time for me to get an autotransplant, let’s say. And so I need to do a couple of things. I need to get my stem cells collected. I need to then get my high-dose [conditioning] therapy, and then follows the stem cell therapy reinfusion. So can you take me through each step? Where is that done?
Dr. Sung: Absolutely. So the collection will occur in the outpatient setting, typically after mobilization with G-CSF [granulocyte colony–stimulating factor] and/or plerixafor. That will occur in our outpatient clinic with one of our leukapheresis machines. And the patient will then return to that same outpatient clinic, which is the same building, the same facility as the hospital, to receive melphalan conditioning. And then, following conditioning, about 24 hours after, day 0, that’s the day of their stem cell transplant infusion, which we do in the hospital setting just because of the potential for reactions associated with that.
But everything after that, from day 1 onwards, we try to keep them at home. And as I said, they will stay in their home. One of our nurse practitioners or physician assistants will visit them in the morning, do the assessment and draw the labs. And nurses will return in the afternoon to deliver any supportive care that they need.
Dr. Henry: So let’s define “home.” So I’m a Philadelphia resident and I say to you, Dr. Sung, I want to go home. You say, well, Philadelphia is too far. What is close enough and not too far, when you say home?
Dr. Sung: Absolutely. So when we originally conceived the program, we focused on patients who lived within an hour of our transplant center. And in part, that was because, as you know, unfortunately, things can sometimes go wrong during transplant. One of the most concerning ones is infections. And if a patient were to develop a neutropenic fever, we would want them to be seen as urgently as possible within an hour. And that’s where our limitation comes from.
So for our patients who live more than an hour away, those are the ones that we will have relocate to temporary lodging near our transplant center. And we’ve worked with several facilities in the area that have clean, furnished units that are available for rent. Many insurances also include lodging benefits for patients during stem cell transplant, recognizing this need. And historically, those [patients] were not considered part of our transplant patient cohorts.
I have not mentioned, but we initially did this in a phase 1 study, and we’re now studying it in a series of randomized, phase 2 studies that I can go into detail later on. And because they were not necessarily in their home, but a temporary lodging environment, those patients who relocated to Durham were not eligible for a home transplant study.
However, in the setting of the COVID-19 pandemic, we’ve actually pivoted our program in many ways. Specifically, if you think about a patient who’s coming into contact with the medical system, they come to the hospital, they meet someone at the door who is screening them for COVID-19. They see someone who checks them in at the front desk. A medical assistant takes them in the back. Someone calls their labs and phlebotomy. They may encounter other patients and environmental services, other individuals in the setting. You’re talking about dozens of different encounters. Who knows how many surfaces that potentially someone with COVID-19 has coughed on or contaminated?
And in contrast, you have house calls, which even if they are located in the temporary lodging, that’s just one or two individuals going into their living environment. They’re not encountering any different surfaces. And so, in the setting of COVID-19, we felt that this platform had the potential to help protect all our transplant patients who are among the most vulnerable patients, the most immunocompromised patients, and so we expanded our program to include those individuals as well.
Dr. Henry: So ... what are the actual outcomes of your patients in terms of how they’re doing, engrafting, and getting cured of their malignancy?
Dr. Sung: So as I mentioned, we first did this in a phase 1 safety and feasibility pilot study of both autologous and allo-transplant patients. This was presented at the annual meeting of the American Society of Hematology [Blood. 2017;130:745]. And we’re actually about ready to submit our manuscript on this.
And we found no difference in outcomes between patients who received care in the home transplant setting versus those who received conventional care either in the day hospital or hospital environment. The process appeared safe. Patients did just as well, if not better. Certainly, anecdotally, patients would talk about feeling so much more comfortable and happier being cared for in that home environment.
And we are now in the process of formally studying these outcomes in two NIH [National Institutes of Health]-funded clinical trials, one focused on allogeneic transplant patients [NCT02218151] and the other focused on autologous transplant patients [NCT01725022].
Dr. Henry: So of course, I’m waiting for this next question, which is cost. The services are the same, but you have people traveling, people who are highly skilled caregivers. Have you looked at cost differences from hospital versus home?
Dr. Sung: Absolutely. So you do have increased upfront costs because you have travel time for advanced practice providers and nurses. Not only that, but when a nurse is helping to give a patient a blood transfusion in the home environment, they’re 1:1 with that patient as opposed to the day hospital where a nurse could help with transfusions simultaneously for multiple patients. At the same time, by keeping patients out of the hospital, you have drastic, significant cost savings in that way.
In addition, I should mention, part of why we’re conducting these randomized, phase 2 clinical trials is we believe home care actually has the potential to decrease complications. One area of my research is on the impact of the microbiome, the bacteria in the gut, on transplant outcomes. And we’ve done a number of studies, many in collaboration with Memorial Sloan Kettering, showing that disruption of the microbiota, the bacteria in the gut, is associated with increased infections, graft-versus-host disease, and treatment-related mortality if we’re able to keep patients in their home setting.
However, I actually should go back a step. It’s well known that, if you take an individual from their home setting and put them in a foreign environment such as the hospital, that new environment, that new diet, hospital food as opposed to home food, and so forth, can dramatically shift the microbiome. Our hypothesis is that, by keeping patients in the home environment, their familiar environment will be able to help preserve their microbiome, thus decreasing infections, graft-versus-host disease, and other complications. That’s actually the goal of our studies: to see if we can preserve the microbiome and decrease complications.
Dr. Henry: So how will you evaluate that? Are you doing fecal studies, patient culture studies? How are you testing that?
Dr. Sung: So we have a very broad biobank program where we collect stool on our transplantations, pretransplant, day 0, weekly for the first month. And then, in the case of our allogeneic transplant patients, day 60, 90, 180, and 365.
And we do that both in our home transplant patients as well as their matched controls on the phase 2 studies. And we also collect it on a lot of our other transplant patients as part of our biobanking programs and our observational studies to try to understand what’s going on during transplant and how to help improve transplant outcomes.
Dr. Henry: Do you have any results of that? You’re probably showing a difference.
Dr. Sung: We think so, on some preliminary results, but those were based on small numbers of patients. And we’re really hoping that these randomized clinical trials with the larger numbers of patients enrolled will help show that difference.
But getting back to your earlier question about cost, a case of graft-versus-host disease, grade 2 or higher, can add about $100,000 to the cost of care. So if you prevent one case of bad gut or liver graft-versus-host disease, those are your cost savings right there.
The randomized, phase 2 trial for allogeneic transplant patients, the primary endpoint is graft-versus-host disease. So we’re looking at the microbiome and those associations and the prevention of GVHD. For the randomized clinical trial in autologous transplant patients – with autologous stem cells, you’re not going to get GVHD – but we do hope to improve quality of life and long-term outcomes in those patients as well.
Dr. Henry: Wonderful. Well, Tony, I really want to thank you so much for talking with us today.
Dr. Sung: Thank you very much for this opportunity. And again, I also want to just thank everyone who’s been involved in these studies, the advanced practice providers and nurses who are caring for our patients at home, the study staff who have been involved. Particularly, I’d like to highlight the role of both Nelson Chao, who’s our division chief and my mentor who piloted and first developed home transplant, and Kristin Nichols, our research nurse who has really led the drive forward.
Dr. Sung and Dr. Henry have no relevant disclosures. The trials are funded by grants from the National Institutes of Health.
Researchers are conducting phase 2 trials to find out.
Anthony D. Sung, MD, of Duke University, Durham, N.C., described this research to David H. Henry, MD, of Penn Medicine in Philadelphia, host of the Blood & Cancer podcast.
On the Nov. 12 episode of Blood & Cancer, Dr. Sung outlined the process of receiving post-HSCT care at home and discussed Duke’s clinical trials assessing the impact of home care on costs, quality of life, the microbiome, graft-versus-host disease (GVHD), and other outcomes. The following transcript of that discussion has been edited for length and clarity.
David Henry, MD: Welcome to this podcast. We’re delighted to have you listening today because we’re going to be speaking with Dr. Anthony Sung from Duke University, where he is assistant professor of medicine in the division of hematologic malignancies and cellular therapies.
So let’s get right into it. I’m a generalist at Pennsylvania Hospital in Philadelphia, where we do auto [autologous] transplants at the main university hospital, autos and allos [allogeneic], and these patients are in [hospital] anywhere from a little bit to a long time. And I’ve often thought to try and do some of this as outpatient. But I think you have a project, which I’m going to ask you to describe, where you try and do most [treatment] outpatient. So tell me what this project is all about, and we’ll skip through how it works.
Anthony Sung, MD: Absolutely. So this is focused on both autologous as well as allogeneic stem cell transplant patients at Duke and a few other centers around the country. Duke University has actually had a long history of an outpatient transplant program. This program is based in a day hospital, which is basically like a high-functioning clinic that’s open 7 days a week. Patients can come into the hospital and receive blood transfusions, IV infusions, and any other therapies that they would need as part of their stem cell transplant treatment in the outpatient setting, returning to their home or to a furnished apartment, temporary lodging, while they’re receiving their care.
What we have done, however, is to take this a step further and deliver care within the patient’s own home. In a sense, we’re returning to an older form of medicine where doctors would make house calls. Within our home-transplant program, instead of the patients having to be in the hospital or instead of having to come back and forth to the outpatient hospital every day, which places additional stresses and strains upon them, our providers will make house calls to the patient’s homes, will draw their labs right there, do a history and physical exam, assess and attend to any of the needs that they have.
Then in the afternoon, the providers will return, have the labs run in the hospital, as they would normally do, a CBC, CMP [comprehensive metabolic panel], and so forth. And then a nurse would return to the patient’s home if needed to deliver any interventions, such as blood transfusions, intravenous fluids, or electrolytes, right there in the comfort of the patient’s own home.
Dr. Henry: So let’s then take it through what happens. Say I am a patient with myeloma. I’ve had various therapies, and it’s time for me to get an autotransplant, let’s say. And so I need to do a couple of things. I need to get my stem cells collected. I need to then get my high-dose [conditioning] therapy, and then follows the stem cell therapy reinfusion. So can you take me through each step? Where is that done?
Dr. Sung: Absolutely. So the collection will occur in the outpatient setting, typically after mobilization with G-CSF [granulocyte colony–stimulating factor] and/or plerixafor. That will occur in our outpatient clinic with one of our leukapheresis machines. And the patient will then return to that same outpatient clinic, which is the same building, the same facility as the hospital, to receive melphalan conditioning. And then, following conditioning, about 24 hours after, day 0, that’s the day of their stem cell transplant infusion, which we do in the hospital setting just because of the potential for reactions associated with that.
But everything after that, from day 1 onwards, we try to keep them at home. And as I said, they will stay in their home. One of our nurse practitioners or physician assistants will visit them in the morning, do the assessment and draw the labs. And nurses will return in the afternoon to deliver any supportive care that they need.
Dr. Henry: So let’s define “home.” So I’m a Philadelphia resident and I say to you, Dr. Sung, I want to go home. You say, well, Philadelphia is too far. What is close enough and not too far, when you say home?
Dr. Sung: Absolutely. So when we originally conceived the program, we focused on patients who lived within an hour of our transplant center. And in part, that was because, as you know, unfortunately, things can sometimes go wrong during transplant. One of the most concerning ones is infections. And if a patient were to develop a neutropenic fever, we would want them to be seen as urgently as possible within an hour. And that’s where our limitation comes from.
So for our patients who live more than an hour away, those are the ones that we will have relocate to temporary lodging near our transplant center. And we’ve worked with several facilities in the area that have clean, furnished units that are available for rent. Many insurances also include lodging benefits for patients during stem cell transplant, recognizing this need. And historically, those [patients] were not considered part of our transplant patient cohorts.
I have not mentioned, but we initially did this in a phase 1 study, and we’re now studying it in a series of randomized, phase 2 studies that I can go into detail later on. And because they were not necessarily in their home, but a temporary lodging environment, those patients who relocated to Durham were not eligible for a home transplant study.
However, in the setting of the COVID-19 pandemic, we’ve actually pivoted our program in many ways. Specifically, if you think about a patient who’s coming into contact with the medical system, they come to the hospital, they meet someone at the door who is screening them for COVID-19. They see someone who checks them in at the front desk. A medical assistant takes them in the back. Someone calls their labs and phlebotomy. They may encounter other patients and environmental services, other individuals in the setting. You’re talking about dozens of different encounters. Who knows how many surfaces that potentially someone with COVID-19 has coughed on or contaminated?
And in contrast, you have house calls, which even if they are located in the temporary lodging, that’s just one or two individuals going into their living environment. They’re not encountering any different surfaces. And so, in the setting of COVID-19, we felt that this platform had the potential to help protect all our transplant patients who are among the most vulnerable patients, the most immunocompromised patients, and so we expanded our program to include those individuals as well.
Dr. Henry: So ... what are the actual outcomes of your patients in terms of how they’re doing, engrafting, and getting cured of their malignancy?
Dr. Sung: So as I mentioned, we first did this in a phase 1 safety and feasibility pilot study of both autologous and allo-transplant patients. This was presented at the annual meeting of the American Society of Hematology [Blood. 2017;130:745]. And we’re actually about ready to submit our manuscript on this.
And we found no difference in outcomes between patients who received care in the home transplant setting versus those who received conventional care either in the day hospital or hospital environment. The process appeared safe. Patients did just as well, if not better. Certainly, anecdotally, patients would talk about feeling so much more comfortable and happier being cared for in that home environment.
And we are now in the process of formally studying these outcomes in two NIH [National Institutes of Health]-funded clinical trials, one focused on allogeneic transplant patients [NCT02218151] and the other focused on autologous transplant patients [NCT01725022].
Dr. Henry: So of course, I’m waiting for this next question, which is cost. The services are the same, but you have people traveling, people who are highly skilled caregivers. Have you looked at cost differences from hospital versus home?
Dr. Sung: Absolutely. So you do have increased upfront costs because you have travel time for advanced practice providers and nurses. Not only that, but when a nurse is helping to give a patient a blood transfusion in the home environment, they’re 1:1 with that patient as opposed to the day hospital where a nurse could help with transfusions simultaneously for multiple patients. At the same time, by keeping patients out of the hospital, you have drastic, significant cost savings in that way.
In addition, I should mention, part of why we’re conducting these randomized, phase 2 clinical trials is we believe home care actually has the potential to decrease complications. One area of my research is on the impact of the microbiome, the bacteria in the gut, on transplant outcomes. And we’ve done a number of studies, many in collaboration with Memorial Sloan Kettering, showing that disruption of the microbiota, the bacteria in the gut, is associated with increased infections, graft-versus-host disease, and treatment-related mortality if we’re able to keep patients in their home setting.
However, I actually should go back a step. It’s well known that, if you take an individual from their home setting and put them in a foreign environment such as the hospital, that new environment, that new diet, hospital food as opposed to home food, and so forth, can dramatically shift the microbiome. Our hypothesis is that, by keeping patients in the home environment, their familiar environment will be able to help preserve their microbiome, thus decreasing infections, graft-versus-host disease, and other complications. That’s actually the goal of our studies: to see if we can preserve the microbiome and decrease complications.
Dr. Henry: So how will you evaluate that? Are you doing fecal studies, patient culture studies? How are you testing that?
Dr. Sung: So we have a very broad biobank program where we collect stool on our transplantations, pretransplant, day 0, weekly for the first month. And then, in the case of our allogeneic transplant patients, day 60, 90, 180, and 365.
And we do that both in our home transplant patients as well as their matched controls on the phase 2 studies. And we also collect it on a lot of our other transplant patients as part of our biobanking programs and our observational studies to try to understand what’s going on during transplant and how to help improve transplant outcomes.
Dr. Henry: Do you have any results of that? You’re probably showing a difference.
Dr. Sung: We think so, on some preliminary results, but those were based on small numbers of patients. And we’re really hoping that these randomized clinical trials with the larger numbers of patients enrolled will help show that difference.
But getting back to your earlier question about cost, a case of graft-versus-host disease, grade 2 or higher, can add about $100,000 to the cost of care. So if you prevent one case of bad gut or liver graft-versus-host disease, those are your cost savings right there.
The randomized, phase 2 trial for allogeneic transplant patients, the primary endpoint is graft-versus-host disease. So we’re looking at the microbiome and those associations and the prevention of GVHD. For the randomized clinical trial in autologous transplant patients – with autologous stem cells, you’re not going to get GVHD – but we do hope to improve quality of life and long-term outcomes in those patients as well.
Dr. Henry: Wonderful. Well, Tony, I really want to thank you so much for talking with us today.
Dr. Sung: Thank you very much for this opportunity. And again, I also want to just thank everyone who’s been involved in these studies, the advanced practice providers and nurses who are caring for our patients at home, the study staff who have been involved. Particularly, I’d like to highlight the role of both Nelson Chao, who’s our division chief and my mentor who piloted and first developed home transplant, and Kristin Nichols, our research nurse who has really led the drive forward.
Dr. Sung and Dr. Henry have no relevant disclosures. The trials are funded by grants from the National Institutes of Health.
Researchers are conducting phase 2 trials to find out.
Anthony D. Sung, MD, of Duke University, Durham, N.C., described this research to David H. Henry, MD, of Penn Medicine in Philadelphia, host of the Blood & Cancer podcast.
On the Nov. 12 episode of Blood & Cancer, Dr. Sung outlined the process of receiving post-HSCT care at home and discussed Duke’s clinical trials assessing the impact of home care on costs, quality of life, the microbiome, graft-versus-host disease (GVHD), and other outcomes. The following transcript of that discussion has been edited for length and clarity.
David Henry, MD: Welcome to this podcast. We’re delighted to have you listening today because we’re going to be speaking with Dr. Anthony Sung from Duke University, where he is assistant professor of medicine in the division of hematologic malignancies and cellular therapies.
So let’s get right into it. I’m a generalist at Pennsylvania Hospital in Philadelphia, where we do auto [autologous] transplants at the main university hospital, autos and allos [allogeneic], and these patients are in [hospital] anywhere from a little bit to a long time. And I’ve often thought to try and do some of this as outpatient. But I think you have a project, which I’m going to ask you to describe, where you try and do most [treatment] outpatient. So tell me what this project is all about, and we’ll skip through how it works.
Anthony Sung, MD: Absolutely. So this is focused on both autologous as well as allogeneic stem cell transplant patients at Duke and a few other centers around the country. Duke University has actually had a long history of an outpatient transplant program. This program is based in a day hospital, which is basically like a high-functioning clinic that’s open 7 days a week. Patients can come into the hospital and receive blood transfusions, IV infusions, and any other therapies that they would need as part of their stem cell transplant treatment in the outpatient setting, returning to their home or to a furnished apartment, temporary lodging, while they’re receiving their care.
What we have done, however, is to take this a step further and deliver care within the patient’s own home. In a sense, we’re returning to an older form of medicine where doctors would make house calls. Within our home-transplant program, instead of the patients having to be in the hospital or instead of having to come back and forth to the outpatient hospital every day, which places additional stresses and strains upon them, our providers will make house calls to the patient’s homes, will draw their labs right there, do a history and physical exam, assess and attend to any of the needs that they have.
Then in the afternoon, the providers will return, have the labs run in the hospital, as they would normally do, a CBC, CMP [comprehensive metabolic panel], and so forth. And then a nurse would return to the patient’s home if needed to deliver any interventions, such as blood transfusions, intravenous fluids, or electrolytes, right there in the comfort of the patient’s own home.
Dr. Henry: So let’s then take it through what happens. Say I am a patient with myeloma. I’ve had various therapies, and it’s time for me to get an autotransplant, let’s say. And so I need to do a couple of things. I need to get my stem cells collected. I need to then get my high-dose [conditioning] therapy, and then follows the stem cell therapy reinfusion. So can you take me through each step? Where is that done?
Dr. Sung: Absolutely. So the collection will occur in the outpatient setting, typically after mobilization with G-CSF [granulocyte colony–stimulating factor] and/or plerixafor. That will occur in our outpatient clinic with one of our leukapheresis machines. And the patient will then return to that same outpatient clinic, which is the same building, the same facility as the hospital, to receive melphalan conditioning. And then, following conditioning, about 24 hours after, day 0, that’s the day of their stem cell transplant infusion, which we do in the hospital setting just because of the potential for reactions associated with that.
But everything after that, from day 1 onwards, we try to keep them at home. And as I said, they will stay in their home. One of our nurse practitioners or physician assistants will visit them in the morning, do the assessment and draw the labs. And nurses will return in the afternoon to deliver any supportive care that they need.
Dr. Henry: So let’s define “home.” So I’m a Philadelphia resident and I say to you, Dr. Sung, I want to go home. You say, well, Philadelphia is too far. What is close enough and not too far, when you say home?
Dr. Sung: Absolutely. So when we originally conceived the program, we focused on patients who lived within an hour of our transplant center. And in part, that was because, as you know, unfortunately, things can sometimes go wrong during transplant. One of the most concerning ones is infections. And if a patient were to develop a neutropenic fever, we would want them to be seen as urgently as possible within an hour. And that’s where our limitation comes from.
So for our patients who live more than an hour away, those are the ones that we will have relocate to temporary lodging near our transplant center. And we’ve worked with several facilities in the area that have clean, furnished units that are available for rent. Many insurances also include lodging benefits for patients during stem cell transplant, recognizing this need. And historically, those [patients] were not considered part of our transplant patient cohorts.
I have not mentioned, but we initially did this in a phase 1 study, and we’re now studying it in a series of randomized, phase 2 studies that I can go into detail later on. And because they were not necessarily in their home, but a temporary lodging environment, those patients who relocated to Durham were not eligible for a home transplant study.
However, in the setting of the COVID-19 pandemic, we’ve actually pivoted our program in many ways. Specifically, if you think about a patient who’s coming into contact with the medical system, they come to the hospital, they meet someone at the door who is screening them for COVID-19. They see someone who checks them in at the front desk. A medical assistant takes them in the back. Someone calls their labs and phlebotomy. They may encounter other patients and environmental services, other individuals in the setting. You’re talking about dozens of different encounters. Who knows how many surfaces that potentially someone with COVID-19 has coughed on or contaminated?
And in contrast, you have house calls, which even if they are located in the temporary lodging, that’s just one or two individuals going into their living environment. They’re not encountering any different surfaces. And so, in the setting of COVID-19, we felt that this platform had the potential to help protect all our transplant patients who are among the most vulnerable patients, the most immunocompromised patients, and so we expanded our program to include those individuals as well.
Dr. Henry: So ... what are the actual outcomes of your patients in terms of how they’re doing, engrafting, and getting cured of their malignancy?
Dr. Sung: So as I mentioned, we first did this in a phase 1 safety and feasibility pilot study of both autologous and allo-transplant patients. This was presented at the annual meeting of the American Society of Hematology [Blood. 2017;130:745]. And we’re actually about ready to submit our manuscript on this.
And we found no difference in outcomes between patients who received care in the home transplant setting versus those who received conventional care either in the day hospital or hospital environment. The process appeared safe. Patients did just as well, if not better. Certainly, anecdotally, patients would talk about feeling so much more comfortable and happier being cared for in that home environment.
And we are now in the process of formally studying these outcomes in two NIH [National Institutes of Health]-funded clinical trials, one focused on allogeneic transplant patients [NCT02218151] and the other focused on autologous transplant patients [NCT01725022].
Dr. Henry: So of course, I’m waiting for this next question, which is cost. The services are the same, but you have people traveling, people who are highly skilled caregivers. Have you looked at cost differences from hospital versus home?
Dr. Sung: Absolutely. So you do have increased upfront costs because you have travel time for advanced practice providers and nurses. Not only that, but when a nurse is helping to give a patient a blood transfusion in the home environment, they’re 1:1 with that patient as opposed to the day hospital where a nurse could help with transfusions simultaneously for multiple patients. At the same time, by keeping patients out of the hospital, you have drastic, significant cost savings in that way.
In addition, I should mention, part of why we’re conducting these randomized, phase 2 clinical trials is we believe home care actually has the potential to decrease complications. One area of my research is on the impact of the microbiome, the bacteria in the gut, on transplant outcomes. And we’ve done a number of studies, many in collaboration with Memorial Sloan Kettering, showing that disruption of the microbiota, the bacteria in the gut, is associated with increased infections, graft-versus-host disease, and treatment-related mortality if we’re able to keep patients in their home setting.
However, I actually should go back a step. It’s well known that, if you take an individual from their home setting and put them in a foreign environment such as the hospital, that new environment, that new diet, hospital food as opposed to home food, and so forth, can dramatically shift the microbiome. Our hypothesis is that, by keeping patients in the home environment, their familiar environment will be able to help preserve their microbiome, thus decreasing infections, graft-versus-host disease, and other complications. That’s actually the goal of our studies: to see if we can preserve the microbiome and decrease complications.
Dr. Henry: So how will you evaluate that? Are you doing fecal studies, patient culture studies? How are you testing that?
Dr. Sung: So we have a very broad biobank program where we collect stool on our transplantations, pretransplant, day 0, weekly for the first month. And then, in the case of our allogeneic transplant patients, day 60, 90, 180, and 365.
And we do that both in our home transplant patients as well as their matched controls on the phase 2 studies. And we also collect it on a lot of our other transplant patients as part of our biobanking programs and our observational studies to try to understand what’s going on during transplant and how to help improve transplant outcomes.
Dr. Henry: Do you have any results of that? You’re probably showing a difference.
Dr. Sung: We think so, on some preliminary results, but those were based on small numbers of patients. And we’re really hoping that these randomized clinical trials with the larger numbers of patients enrolled will help show that difference.
But getting back to your earlier question about cost, a case of graft-versus-host disease, grade 2 or higher, can add about $100,000 to the cost of care. So if you prevent one case of bad gut or liver graft-versus-host disease, those are your cost savings right there.
The randomized, phase 2 trial for allogeneic transplant patients, the primary endpoint is graft-versus-host disease. So we’re looking at the microbiome and those associations and the prevention of GVHD. For the randomized clinical trial in autologous transplant patients – with autologous stem cells, you’re not going to get GVHD – but we do hope to improve quality of life and long-term outcomes in those patients as well.
Dr. Henry: Wonderful. Well, Tony, I really want to thank you so much for talking with us today.
Dr. Sung: Thank you very much for this opportunity. And again, I also want to just thank everyone who’s been involved in these studies, the advanced practice providers and nurses who are caring for our patients at home, the study staff who have been involved. Particularly, I’d like to highlight the role of both Nelson Chao, who’s our division chief and my mentor who piloted and first developed home transplant, and Kristin Nichols, our research nurse who has really led the drive forward.
Dr. Sung and Dr. Henry have no relevant disclosures. The trials are funded by grants from the National Institutes of Health.