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Browsing by Author "Sankar, Jishnu"

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    Pore-forming proteins and their role in cancer and inflammation: Mechanistic insights and plausible druggable targets
    (Elsevier Ireland Ltd, 2022-08-30T00:00:00) Sankar, Jishnu; Arora, Sahil; Joshi, Gaurav; Kumar, Raj
    Perforin is a granular effector pore-forming protein formed in NK cells and Cytotoxic T lymphocytes. These cytotoxic proteins are part of the first-line immune defense in the human body. They ensure apoptosis of pathogen-infected cells or tumor cells in the human body. Activation of receptors on NK cell or T cell triggers secondary proteins in these cells. Further, it leads to Ca2+ dependent perforin egress towards the target cell, ensued by PI3K signaling pathway. Perforin undergoes oligomerization over the target cell membrane and forms transmembrane pores with the membrane-spanning domain-MACPF domain. Granzymes, proapoptotic serine proteases are released through these pores and initiate the target cell apoptotic pathway leading to the cell death. Although perforin is a savior for humans from tumor and viral infections, uncontrolled expression of the perforins leads to the autoimmune conditions, including Familial Hemophagocytic lymphohistiocytosis, insulin-dependent diabetes, and cerebral myocarditis. The present review is the concerted effort to highlight the mechanistic pathways concerning perforin secretion, NK cell and T cell-mediated cytotoxicity towards virus-infected and transformed cells. This is followed by the discussion on synthetic derivatives tested so far to inhibit the perforin in pre and clinical arena for certain unusual conditions. � 2022 Elsevier B.V.

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