Allergic contact dermatitis: the cellular effectors

Abstract excerpt

Contact hypersensitivity reactions are mediated by lymphocytic effector cells. Until recently it was believed that the most important of these were CD4+ T lymphocytes. However, there is growing evidence that in many instances the predominant effector cell may be a CD8+ T lymphocyte, with in some instances CD4+ cells performing a counter-regulatory function. Here we review the roles of CD4+ T helper (Th) cells and...

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