Absence of the RT-6 T cell subset in diabetes-prone BB/W rats.

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Abstract
Diabetes-prone Bio-breeding/Worcester (DP) rats exhibit a severe T cell lymphopenia and autoimmune pancreatic insulitis. The present results indicate that the T cell lymphopenia is due in large part, if not entirely, to the absence of the RT-6+ peripheral T cell subset, which includes members of both the helper/inducer (W3/25) and suppressor/cytotoxic (OX 8) antigenic phenotypes. Delineation of the causal mechanism(s) for the selective absence of RT-6+ T cells in DP rats may provide important insights into the cellular basis of the insulin-dependent diabetes mellitus syndrome in these animals.