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AB conceived the study, carried out experiments on the Ca2+-signaling and drafted the manuscript. JK carried out experiments on the Ca2+-signaling and Western Blot analysis. AT and RMH participated in the study design and revised the manuscript critically for important intellectual SIS3 mw content.”
“Background Human HCC (hepatocellular carcinomas) is the common hepatic highly malignant tumor. Most patients, selleck especially in China, present at diagnosis with

a high stage. The etiopathogenisis and developments of HCC are not well known. Deregulation of cell proliferation and cell apoptosis underlies neoplastic initiation and development, which involves multiple gene alterations, and is regulated by complicated signal transduction AMP deaminase pathways. It has become clear that deregulated apoptosis plays a pivotal role in tumorigenesis, malignancy and metastatic potential [1]. Accumulating evidence suggests that multiple intrinsic and extrinsic signaling molecules contribute to the resistance to death ligands- and chemotherapeutics-induced apoptosis in cancer cells. c-FLIP(cellular FLICE-inhibitory protein) is a novel member of IAP(inhibitor of apoptosis protein) family, which inhibits the apoptosis signaling mediated by the death receptors Fas, DR4, and DR5[2, 3]. c-FLIP plays a pivotal role in modulating the induction of apoptosis in variant cancer cells [4–6]. Down-regulating c-FLIP expression confers sensitivity to TRAIL- and Fas-induced apoptosis. c-FLIP has homology to caspase-8 and caspase-10, but lacks their protease activity due to the absence of key NH2 acid residues at the active site[7]. c-FLIP belongs to the potential negative regulators of the DR(death receptor) pathway by interfering with caspase-8 activation. Two splicing variants of c-FLIP, 55 kDa c-FLIPL(long form) and 25 kDa c-FLIPS(short form), have the capacity to block DR-mediated apoptosis.

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