... villainÕs role in other autoimmunediseases: in insulin-dependent diabetes,T lymphocytes destroy insulin-produc-ing cells in the pancreas, and in multiplesclerosis, they direct their fury against the ... During these interac-tions, the B cell can also in uence the activity of the T cell.B CELLT CELLLYMPHOKINESCopyright 1993 Scientific American, Inc.uterus and prostate. These findings hintthat ... successivekinds of T cells that populate the lining(epithelium) of the skin, various oriÞces(such as the mouth and vagina) and the organs that connect with them (the gas-trointestinal tract,...