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.