Abstract
Diabetes cell therapy by human islet transplantation can restore an endogenous insulin secretion and normal glycaemic control in type 1 diabetic patients for as long as 10 years post transplantation. Before transplantation, each clinical islet preparation undergoes extensive in-vitro and in-vivo quality controls. The in-vivo quality control assay consists of transplanting human islets under the kidney capsule of immunocompromised mice. Currently, it is considered the best predictive factor to qualify clinical transplant efficiency. This chimeric model offers a wide area of study since it combines the possibility of producing not only quantitative but also a maximum of qualitative data. Today's technological advances allow us to obtain more accurate and stronger data from the animals used in research while ensuring their comfort and well-being throughout the protocol, including cage enrichment and pain treatment during and after surgery. As demonstrated in this valuable model, we are able to generate more usable results (Refine), while reducing the number of animals used (Reduce), by focusing on the development of ex-vivo analysis techniques (Replace), which clearly highlights the Burch and Russell 3Rs concept.
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