Long-term culture of islets abrogates cytokine-induced or lymphocyte-induced increase of antigen expression on ?? cells1

Abstract

In conclusion, in addition to reduction-depletion of passenger leukocytes, long-term culturing of islets also is able to counteract the IFN-gamma-induced or allogeneic lymphocyte-induced increase of antigen expression. Therefore, initiation of rejection and generation of cytotoxic cells might be altered or timely delayed when long-term cultured islets are transplanted. The variable and conflicting in vivo results after transplantation of long-term cultured islets might be explained by the possible indirect antigen presentation, which is not influenced by islet preculture.