Related Experiment Videos
Piscine islet xenotransplantation.
James R Wright1, Bill Pohajdak, Bao-You Xu
1Department of Pathology, Faculty of Medicine, Dalhousie University, IWK Health Centre, Halifax, Nova Scotia, Canada.
ILAR Journal
|July 2, 2004
Summary
Tilapia Brockmann bodies (BBs) show promise for islet xenotransplantation, offering immediate function and versatile transplantation sites. Transgenic tilapia with humanized insulin may overcome immunogenicity for future clinical applications.
Area of Science:
- Xenotransplantation research
- Endocrinology
- Immunology
Background:
- Tilapia possess large, easily harvestable islet organs (Brockmann bodies, BBs).
- BBs from tilapia can restore normoglycemia in diabetic immunodeficient mice.
- Rejection mechanisms in euthymic recipients resemble those of other xenograft donors.
Purpose of the Study:
- To evaluate tilapia BBs as a potential donor source for islet xenotransplantation.
- To investigate the versatility of tilapia BB transplantation sites and assessment methods.
- To address the immunogenicity of tilapia insulin for potential clinical xenotransplantation.
Main Methods:
- Transplantation of tilapia BBs into streptozotocin-diabetic immunodeficient and euthymic mice.
- Assessment of normoglycemia, glucose tolerance, and xenograft rejection.
- Development of transgenic tilapia expressing humanized tilapia insulin.
Main Results:
- Tilapia BBs provided long-term normoglycemia and normal glucose tolerance in immunodeficient mice.
- Xenograft rejection in euthymic recipients mimicked established models.
- Tilapia BBs function immediately post-transplantation, allowing functional assessment.
- Transgenic tilapia expressing humanized insulin were produced to reduce immunogenicity.
Conclusions:
- Tilapia BBs are a viable model for studying islet xenotransplantation, offering functional and logistical advantages.
- The immunogenicity of tilapia insulin is a barrier to clinical application.
- Transgenic tilapia represent a promising step towards overcoming cross-species insulin incompatibility in islet xenotransplantation.