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JOURNAL ARTICLE
REVIEW
Xenoislets: porcine pancreatic islets for the treatment of type I diabetes.
Current Opinion in Organ Transplantation 2017 December
PURPOSE OF REVIEW: Porcine islets are being extensively investigated as alternative sources of insulin-secreting cells for transplantation in insulin-dependent diabetic patients. The present review focuses on recent advances in porcine islet transplantation with particular emphasis on new transgenic pig models, islet encapsulation, and biosafety considerations.
RECENT FINDINGS: Genetic modifications aimed to reduce islet cell immunogenicity, to prolong their survival, and to improve their secretory function have been reported. Micro- and macroencapsulation of porcine islets should allow their use in the clinic with no or minimal immunosuppression. The risk of porcine endogenous retrovirus transmission is being re-evaluated since no evidence for infection was found in several clinical and preclinical studies.
SUMMARY: Pig islet xenotransplantation is still a serious contestant in the race for novel treatments for type I diabetes. Adequate pathogen screening, animal selection, and the establishment of microbiological, genetic, and potency release quality controls should increase safety and efficacy of future porcine islets transplantation clinical trials.
RECENT FINDINGS: Genetic modifications aimed to reduce islet cell immunogenicity, to prolong their survival, and to improve their secretory function have been reported. Micro- and macroencapsulation of porcine islets should allow their use in the clinic with no or minimal immunosuppression. The risk of porcine endogenous retrovirus transmission is being re-evaluated since no evidence for infection was found in several clinical and preclinical studies.
SUMMARY: Pig islet xenotransplantation is still a serious contestant in the race for novel treatments for type I diabetes. Adequate pathogen screening, animal selection, and the establishment of microbiological, genetic, and potency release quality controls should increase safety and efficacy of future porcine islets transplantation clinical trials.
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