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Abstract
Rat islets encapsulated in the immuno-isolated membrane were transplanted intraperitoneally into 11 streptozotocin induced diabetic mice. The effective rate was 91% while all rejected in the 11 nonencapsulated xenograft group. 4 mice showed complete remission and longest normoglycemic period in those mice was 360 days. The pathological changes of islets of the long-term succesful xenograft group were studied and showed atrophy. It proved that the immuno-isolated membrane can protect rejection during xeno-transplantation.