Actually, I have a close friend and some family that have Type II diabetes that have problems with pancreatic production declining. The idea of regenerating healthy pancreatic tissue from a small amount patient's own remaining healthy tissue is to replace enough tissue for increased insulin production. When using cadaver parts in any replacement of tissue in patients always runs the risk of an immune response, because it is not a perfect match for the patient's system. I know this very well, because I have had patients in the military that have had massive tissue damage of various types from IED's or GSW's in Iraq and Afghanistan. When there were attempts to use cadaver parts for replacement rejection was common once they stopped immunosuppressive medication therapy. The difference here is that they use a small amount of the patient's remaining healthy cells to make the graft, so the body believes recognizes it as its own tissue and does not have the typical immune response. Type I is quite a different story and is an attempt to replace the pancreatic tissue a patient is born with entirely, not actually being able to graft the patient's own completely ineffective tissue. Very large difference.
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