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Effect of ACTH on the Proliferation of the Rat Adrenal Gland

机译:ACTH对大鼠肾上腺增殖的影响

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Although the regulation of steroidogenesis in adrenal fasciculata and reticularis is stimulated by adrenocorticotrophic hormone (ACTH), its role on the proliferation of adrenocortical cell is not established. We thus investigated the effect of ACTH on the proliferation of adrenocortical cells by analyzing the expression of proliferating cell nuclear antigen (PCNA). Endogeneous secretion of ACTH was inhibited by treatment with dexamethasone for 5 days. At intervals after ACTH treatment, homogenate of the adrenal gland was subjected to Western blot analysis. PCNA expression was detected in control rat without any treatment. Dexamethasone administration for 5 days resulted in the reduction of PCNA expression. ACTH administration to the dexamethasone treated rats increased PCNA expression at 24 hr. It is thus demonstrated that ACTH increases cellular proliferation in aderenal cortex.
机译:尽管肾上腺皮质营养激素(ACTH)刺激肾上腺筋膜和网状结构中类固醇生成的调控,但尚未确定其对肾上腺皮质细胞增殖的作用。因此,我们通过分析增殖细胞核抗原(PCNA)的表达来研究ACTH对肾上腺皮质细胞增殖的影响。地塞米松治疗5天可抑制ACTH的内源性分泌。 ACTH治疗后的间隔,对肾上腺匀浆进行蛋白质印迹分析。在未经任何处理的对照大鼠中检测到PCNA表达。地塞米松给药5天导致PCNA表达降低。在地塞米松治疗的大鼠中,ACTH给药在24小时可增加PCNA的表达。因此证明ACTH增加了肾上腺皮质中的细胞增殖。

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