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Inhibition of apoptosis by a Bombyx mori gene

机译:家蚕基因抑制细胞凋亡

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An apoptosis-inhibiting component of silkworm hemolymph, isolated and characterized in our previous study, showed 95% N-terminal amino acid sequence homology with one of the 30K proteins, a group of structurally related proteins. The 30K protein was expressed in mammalian HEK293 cells and CHOK1 cells by transfection with 30Kc6. The expression of 30Kc6 inhibited apoptosis comparably to that of whole silkworm hemolymph, indicating that both intracellular expression and external supplementation inhibited apoptosis. The expression of 30Kc6 resulted in lower intracellular activity for caspase 3. However, the results of in vitro assay of caspase 3 show that the 30Kc6 protein does not inhibit caspase 3 activity. This indicates that the 30Kc6 protein inhibits the apoptosis by working in a further upstream event than caspase 3 activation.
机译:在我们之前的研究中分离和鉴定的蚕丝血淋巴的凋亡抑制成分显示与30K蛋白之一(一组结构相关蛋白)具有95%的N末端氨基酸序列同源性。通过用30Kc6转染在哺乳动物HEK293细胞和CHOK1细胞中表达30K蛋白。 30Kc6的表达与整个家蚕的血淋巴相同,抑制细胞凋亡,表明细胞内的表达和外在的补充都抑制细胞凋亡。 30Kc6的表达导致caspase 3的细胞内活性降低。但是,caspase 3的体外测定结果表明30Kc6蛋白不抑制caspase 3的活性。这表明30Kc6蛋白通过在比caspase 3激活更进一步的上游事件中起作用来抑制细胞凋亡。

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