首页> 外文期刊>Life sciences >Stimulatory effect of paeoniflorin on adenosine A-1 receptors to increase the translocation of protein kinase C (PKC) and glucose transporter (GLUT 4) in isolated rat white adipocytes.
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Stimulatory effect of paeoniflorin on adenosine A-1 receptors to increase the translocation of protein kinase C (PKC) and glucose transporter (GLUT 4) in isolated rat white adipocytes.

机译:eon药苷对腺苷A-1受体的刺激作用,以增加离体大鼠白色脂肪细胞中蛋白激酶C(PKC)和葡萄糖转运蛋白(GLUT 4)的转运。

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摘要

In an attempt to understand the subcellular signals after activation of adenosine A-1 receptors, paeoniflorin was employed to incubate with rat white adipocytes in vitro. Translocation of protein kinase C (PKC) beta-subtype from cytosol to membrane was enhanced by an incubation with paeoniflorin in a concentration-dependent manner similar to that of porcine insulin. Also, 8-cyclopentyl-1,3-dipropylxanthine (DPCPX) inhibited this action of paeoniflorin in a concentration-related fashion and it markedly attenuated the action of paeoniflorin at a concentrations sufficient to block the action of adenosine. Moreover, chelerythrine inhibited the paeoniflorin-stimulated translocation of PKC in a way similar to that stimulated by porcine insulin. Subcellular inhibition is considered because stimulation of porcine insulin was not modified by DPCPX at concentrations sufficient to block adenosine A-1 receptors. Similar results were also observed in adipocytes regarding the translocation of glucose transporter (GLUT4) from cytosol to membrane. Thus, we found that paeoniflorin can activate adenosine A-1 receptors to increase the translocations of PKC and GLUT4, two major signals for glucose uptake, from cytosol to membrane of the white adipocytes in rats.
机译:为了理解激活腺苷A-1受体后的亚细胞信号,采用pa药苷在体外与大鼠白色脂肪细胞一起孵育。用pa药苷以与猪胰岛素类似的浓度依赖性方式增强了蛋白激酶C(PKC)β亚型从细胞质到膜的转运。同样,8-环戊基-1,3-二丙基黄嘌呤(DPCPX)以浓度相关的方式抑制pa药苷的这种作用,并且在足以阻止腺苷作用的浓度下显着减弱了eon药苷的作用。此外,白屈菜红碱以类似于猪胰岛素刺激的方式抑制pa药苷刺激的PKC易位。考虑亚细胞抑制是因为在足以阻断腺苷A-1受体的浓度下,DPCPX并未修饰猪胰岛素的刺激作用。在脂肪细胞中,关于葡萄糖转运蛋白(GLUT4)从细胞质到膜的转运也观察到了相似的结果。因此,我们发现pa药花青素可以激活腺苷A-1受体以增加PKC和GLUT4的易位,这是葡萄糖摄取的两个主要信号,从大鼠的白色脂肪细胞的细胞质到细胞膜。

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