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首页> 外文期刊>Cell biology international. >MODULATION OF HUMAN CACO-2 INTESTINAL EPITHELIAL CELL PHENOTYPE BY PROTEIN KINASE C INHIBITORS
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MODULATION OF HUMAN CACO-2 INTESTINAL EPITHELIAL CELL PHENOTYPE BY PROTEIN KINASE C INHIBITORS

机译:蛋白激酶C抑制剂对人caco-2肠上皮细胞表型的调节

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摘要

Protein kinase C (PKC) isoforms are altered in colon tumors and upon exposure of intestinal mucosa to nutrients. We evaluated the effects of the PKC inhibitors staurosporine and calphostin C on human Caco-2 intestinal epithelial proliferation, motility and differenfiation. Motility was quantified by monolayer expansion and the brush border enzymes dipeptidyl dipeptidase (DPDD) and alkaline phosphatase (AP) by synthetic substrate digestion. Staurosporine (0.03-1.0 ng/ml) and calphostin C (10(-12)M-10(-4) M) dose-dependently inhibited monolayer expansion and AP but stimulated DPDD. Proliferation was also inhibited but the effects of each inhibitor on motility, AP, and DPDD were preserved after mitomycin C proliferative blockade, suggesting that these effects were proliferation-indepentent. PKC inhibitors independently inhibit motility, AP and proliferation in human intestinal Caco-2 epithelial cells, but selectively stimulate the small intestinal differentiation marker DPDD. PKC may regulate small intestinal epithelial differentiation.
机译:在结肠肿瘤中以及肠粘膜暴露于营养物后,蛋白激酶C(PKC)同工型会发生变化。我们评估了PKC抑制剂星形孢菌素和钙磷蛋白C对人Caco-2肠上皮增殖,运动性和分化的影响。通过单层扩增来定量运动性,并且通过合成底物消化来定量刷状边界酶二肽基二肽酶(DPDD)和碱性磷酸酶(AP)。星形孢菌素(0.03-1.0 ng / ml)和钙磷蛋白C(10(-12)M-10(-4)M)剂量依赖性抑制单层扩张和AP,但刺激DPDD。增殖也受到抑制,但是丝裂霉素C增殖阻断后,每种抑制剂对运动性,AP和DPDD的作用得以保留,表明这些作用与增殖无关。 PKC抑制剂独立抑制人肠道Caco-2上皮细胞的运动性,AP和增殖,但选择性刺激小肠分化标记物DPDD。 PKC可能调节小肠上皮分化。

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