Abstract
Traditionally,antigen presenting cells were shown to express MHC Ⅱ antigens.However,some researchers have demonstrated that a subset of T lymphocytes could express MHCⅡ antigens in some situation.Its regulatory mechanism and biological effects remains challenging to researchers.This review provides an overview of the results of these MHC Ⅱ + T lymphocytes regarding to the generation,mechanisms,and the role in immune tolerance induction,aim to provide some insights in clinical immune tolerance induction. Key words: MHCⅡ antigen; T-lymphocytes; Organ transplantation; Immune tolerance
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