The analysis of cytokines following organ transplantion continues to f
lourish as a major area of investigation for transplant biologists. Ov
er the past year many papers have reported the use of both molecular a
nd antibody-based tools to dissect the expression of cytokines during
graft rejection in both experimental and clinical transplantation. Fur
ther, how the expression of cytokines is altered during the induction
of tolerance has been investigated by several groups.