Influence of caspase-binding ability of the X-linked Inhibitor of Apoptosis Protein (XIAP) on serine protease inhibitor-sensitive apoptosis
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Interaction and stabilization of X-linked inhibitor of apoptosis by Raf-1 protein kinase.
Raf-1 serine/threonine protein kinase plays an important role in cell growth, differentiation and cell survival. Recent reports using c-raf-1 gene-knockouts have observed MEK/ERK independent functions of Raf-1 in cell survival and protection from apoptosis. Raf-1 has also been shown to be involved in counteracting specific apoptotic pathways by restraining caspase activation, although the preci...
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The XIAP protein is a member of apoptosis proteins family. The XIAP protein plays a central role in the inhibition of apoptosis and consists of three Baculoviral IAP Repeat domains. The BIR3 domain binds directly to the N-terminal of caspase-9 and therefore it inhibits apoptosis. N-terminal tetrapeptide region of SMAC protein can bind to BIR3, inhibit it and subsequently induce apoptosis. In th...
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Defects in the regulation of apoptosis are one main cause of cancer development and may result from overexpression of anti-apoptotic proteins such as the X-linked inhibitor of apoptosis protein (XIAP). XIAP is frequently overexpressed in human leukemia and prostate and breast tumors. Inhibition of apoptosis by XIAP is mainly coordinated through direct binding to the initiator caspase-9 via its ...
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Protease nexin 1 (PN1) is an endogenous serine protease inhibitor (SERPIN), expressed at high levels in the prostate, and capable of inhibiting the proliferation of prostate cancer cells. We previously showed that PN1-uPA complexes inhibited Sonic Hedgehog (SHH) signalling through engagement of the LRP receptor. Here, we describe an alternative anti-proliferative mechanism through which PN1 exp...
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Secretory Leukocyte Protease Inhibitor (SLPI) is a serine protease inhibitor produced by epithelial and myeloid cells with anti-inflammatory properties. Research has shown that SLPI exerts its anti-inflammatory activity by directly binding to NF-κB DNA binding sites and, in so doing, prevents binding and subsequent transcription of proinflammatory gene expression. In the current study, we demon...
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تاریخ انتشار 2005