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Perforin and Granzymes: Function, Dysfunction and Human Pathology

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Journal Nat Rev Immunol
Date 2015 May 23
PMID 25998963
Citations 552
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Abstract

A defining property of cytotoxic lymphocytes is their expression and regulated secretion of potent toxins, including the pore-forming protein perforin and serine protease granzymes. Until recently, mechanisms of pore formation and granzyme transfer into the target cell were poorly understood, but advances in structural and cellular biology have now begun to unravel how synergy between perforin and granzymes brings about target cell death. These and other advances are demonstrating the surprisingly broad pathophysiological roles of the perforin–granzyme pathway, and this has important implications for understanding immune homeostasis and for developing immunotherapies for cancer and other diseases. In particular, we are beginning to define and understand a range of human diseases that are associated with a failure to deliver active perforin to target cells. In this Review, we discuss the current understanding of the structural, cellular and clinical aspects of perforin and granzyme biology.

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