Dr. Fishbein studies the complex relationship between the immune system and kidney transplants. They specifically investigate how the continuous presence of donor tissue, as well as the way the immune system recognizes specific proteins from the donor, plays a critical role in maintaining tolerance to kidney transplants. This tolerance is crucial for preventing the body from rejecting the new organ. Dr. Fishbein's research reveals that tolerance isn't a one-time achievement; it's an ongoing process that requires the donor's antigens to be present over time to remain effective.
Key findings
Kidney transplant tolerance lasts only as long as the donor kidney is present; removing it leads to a decrease in tolerance.
Switching the way the immune system recognizes donor antigens alters how tolerance is maintained, demonstrating the mechanism's flexibility.
Tolerance to renal allografts is an active process that depends on the presence of donor tissue rather than a permanent state.
Frequently asked questions
Does Dr. Fishbein study kidney transplants?
Yes, Dr. Fishbein specifically studies the mechanisms that allow the immune system to tolerate kidney transplants.
What is the key focus of Dr. Fishbein's research?
Dr. Fishbein focuses on how the ongoing presence of donor tissue and recognition of donor antigens affect kidney transplant tolerance.
How does Dr. Fishbein's work impact transplant patients?
Their work helps to understand how to improve kidney transplant success and reduce the risk of rejection by highlighting the importance of active tolerance.
Publications in plain English
A call to incorporate systems theory and human factors into the existing investigation of harm in clinical research involving healthcare products.
2017
British journal of clinical pharmacology
Edwards BD, Bégaud B, Daemen E, Dokas I, Fishbein JM +12 more
Plain English This paper argues for a new way to investigate harmful incidents that happen during clinical research on healthcare products. The authors believe combining methods from both drug safety studies and human behavior analysis can help organizations learn from mistakes and prevent future harm. They compare this approach to safety improvements in other industries, emphasizing the need for urgent change to avoid repeating preventable errors.
Who this helps: This helps patients by making clinical research safer.
Role of persistence of antigen and indirect recognition in the maintenance of tolerance to renal allografts.
2008
Transplantation
Okumi M, Fishbein JM, Griesemer AD, Gianello PR, Hirakata A +6 more
Plain English Kidney transplant tolerance induced by a short course of cyclosporine depends on the ongoing presence of donor tissue and on how the immune system recognizes donor antigens. Removing the donor kidney caused tolerance to fade over time, and switching antigen recognition pathways shifted the mechanism of tolerance maintenance. These findings reveal that tolerance is an active, antigen-dependent process rather than a permanent state.
Long-term acceptance of primarily vascularized renal allografts in miniature swine. Systemic tolerance versus graft adaptation.
1996
Transplantation
Gianello PR, Yamada K, Fishbein JM, Lorf T, Nickeleit V +3 more
Plain English This study explored how miniature pigs accepted kidney transplants over the long term after receiving an initial transplant. The researchers found that eight pigs accepted a second kidney transplant from the same donor without needing extra medications to suppress their immune system. This is important because it shows that the first transplant can help the immune system tolerate the second transplant, which could lead to better transplant outcomes in humans.
Who this helps: Patients receiving kidney transplants.
Plain English This study looked at how miniature pigs can accept kidney transplants from donors with different class I proteins in their immune systems, even after their bodies generate an immune response against those proteins. It found that while these pigs don't reject the kidney transplants, they still reject skin grafts from the same donors, which shows that their bodies can differentiate between types of tissues and maintain a form of tolerance for the kidneys. This is important because it reveals how transplant acceptance can occur despite specific immune responses, potentially improving transplant outcomes in humans.
Who this helps: This helps patients requiring kidney transplants.
Induction of tolerance to renal allografts across single-haplotype MHC disparities in miniature swine.
1995
Transplantation
Gianello PR, Lorf T, Yamada K, Fishbein JM, Nickeleit V +2 more
Plain English This study examined how well a medication called cyclosporine A (CsA) helps prevent rejection of kidney transplants in miniature pigs that share part of their genetic makeup (haplotypes). The researchers found that when CsA was given for 12 days after a transplant, 67% of the recipients accepted the kidney from a donor with a similar haplotype, compared to none without medication. This matters because it suggests that using CsA could improve success rates for kidney transplants between family members, which often involves matching only certain genetic markers.
Who this helps: This helps patients receiving kidney transplants from family members.
Retransplantation in miniature swine. Lack of a requirement for graft adaptation for maintenance of specific renal allograft tolerance.
1994
Transplantation
Rosengard BR, Fishbein JM, Gianello P, Ojikutu CA, Guzzetta PC +5 more
Plain English Researchers studied how mini pigs accepted kidney transplants without needing medication to suppress their immune systems. They found that 100% of the retransplanted kidneys were accepted without any rejection or medication, showing that the animals’ immune systems could maintain tolerance to these transplants. This matters because it indicates a strong and stable acceptance of previously mismatched kidneys, which could lead to better transplant outcomes in future studies.
Who this helps: This helps patients needing kidney transplants.
Development of tolerance to class II-mismatched renal transplants after a short course of cyclosporine therapy in miniature swine.
1994
Transplantation
Fishbein JM, Rosengard BR, Gianello P, Nickeleit V, Guzzetta PC +5 more
Plain English This study looked at how a specific treatment can help the body accept kidney transplants that are mismatched in two key genetic areas (class II antigens). Researchers found that 5 out of 7 miniature swine that received a short course of immunosuppressive medication (cyclosporine) had long-term acceptance of their mismatched kidney transplants. This is important because it shows that even with certain genetic mismatches, it might be possible to make the body more tolerant of transplanted organs, which could improve transplant success rates in humans.
Who this helps: This helps patients needing kidney transplants and doctors involved in transplant procedures.
Plain English This study looked at how skin cells in specially bred miniature pigs present antigens, which play an important role in the immune response. Researchers found that 1.8-4.7% of the skin cells were able to stimulate strong immune reactions when tested. This is important because understanding how these skin cells function can help improve knowledge about immune responses in transplants and skin diseases.
Who this helps: This helps researchers and doctors working in transplant immunology.
Successful induction of long-term specific tolerance to fully allogeneic renal allografts in miniature swine.
1992
Transplantation
Smith CV, Nakajima K, Mixon A, Guzzetta PC, Rosengard BR +2 more
Plain English The study focused on how to improve kidney transplant acceptance in miniature pigs by using bone marrow transplantation (BMT) to help the body tolerate the new kidney. Researchers found that after receiving BMT and a short treatment with the drug cyclosporine, all four pigs successfully accepted their kidney transplants without experiencing rejection for over 200 days. This finding is important because it shows a potential method to make kidney transplants more successful, even when there are significant genetic differences between the donor and recipient.
Who this helps: This research benefits patients receiving kidney transplants, especially those with difficult donor matches.
Induction of specific tolerance to class I-disparate renal allografts in miniature swine with cyclosporine.
1992
Transplantation
Rosengard BR, Ojikutu CA, Guzzetta PC, Smith CV, Sundt TM +5 more
Plain English This study looked at how to make miniature pigs' immune systems accept kidney transplants from donors with different genetic backgrounds. Researchers gave the pigs a drug called cyclosporine for 12 days, which resulted in 100% of the pigs accepting the transplants for over 100 days, while control pigs rejected their transplants in about 13.7 days. This is important because it shows a way to potentially improve transplant success rates by specifically training the immune system to tolerate the new organ without overwhelming rejection.
Who this helps: This helps transplant patients by increasing the chances of successful kidney transplants.