Optimal allogeneic islet dose for transplantation in insulin-dependent diabetic Macaca fascicularis monkeys

Many groups are working to improve the results of clinical allogeneic islet transplantation in a primate model. However, few studies have focused on the optimal islet dose for achieving normal glycemia without exogenous insulin after transplantation in primate models or on the relationship between r...

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Published in:Scientific reports 2021-04, Vol.11 (1), p.8617-8617, Article 8617
Main Authors: Kim, Geun Soo, Cho, Chan Woo, Lee, Jong Hyun, Shin, Du Yeon, Lee, Han Sin, Lee, Kyo Won, Kwon, Yeongbeen, Kim, Jae Sung, Yang, Heung-Mo, Kim, Sung Joo, Park, Jae Berm
Format: Article
Language:English
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Amylin
Amyloid
Animal models
Blood glucose
CD3 antigen
Diabetes mellitus
Graft rejection
Humanities and Social Sciences
Immunohistochemistry
Insulin
Islet cells
Lymphocytes T
Monkeys & apes
multidisciplinary
Pancreatic islet transplantation
Science
Science (multidisciplinary)
Transplantation
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Summary:Many groups are working to improve the results of clinical allogeneic islet transplantation in a primate model. However, few studies have focused on the optimal islet dose for achieving normal glycemia without exogenous insulin after transplantation in primate models or on the relationship between rejection and islet amyloid polypeptide (IAPP) expression. We evaluated the dose (10,000, 20,000, and > 25,000 islet equivalents (IEQ)/kg) needed to achieve normal glycemia without exogenous insulin after transplantation using eleven cynomolgus monkeys, and we analyzed the characteristics exhibited in the islets after transplantation. 10,000 IEQ/kg (N = 2) failed to control blood glucose level, despite injection with the highest dose of exogenous insulin, and 20,000 IEQ/kg group (N = 5) achieved unstable control, with a high insulin requirement. However, 25,000 IEQ/kg (N = 4) achieved normal glycemia without exogenous insulin and maintained it for more than 60 days. Immunohistochemistry results from staining islets found in liver biopsies indicated that as the number of transplanted islets decreased, the amount of IAPP accumulation within the islets increased, which accelerated CD3 + T cell infiltration. In conclusion, the optimal transplantation dose for achieving a normal glycemia without exogenous insulin in our cynomolgus monkey model was > 25,000 IEQ/kg, and the accumulation of IAPP early after transplantation, which depends on the transplanted islet dose, can be considered one factor in rejection.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-88166-y