Adrenocortical Cells are the Site of Secretion and Action of Insulin-Like Growth Factors and TNF-Alpha

Adrenocortical Cells are the Site of Secretion and Action of Insulin-Like Growth Factors and TNF-Alpha
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肾上腺皮质细胞是胰岛素样生长因子和 TNF-α 的分泌和作用场所

DOI:
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发表时间:
1998
期刊:
Hormone and metabolic research = Hormon- und Stoffwechselforschung = Hormones et metabolisme
影响因子:
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通讯作者:
R. Voutilainen
R. Voutilainen
中科院分区:
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文献类型:
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作者:
R. Voutilainen

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胰岛素样生长因子 I 和/或 II 在肾上腺细胞中表达,并调节其增殖和类固醇激素合成,表明它们可能充当旁分泌/自分泌因子。在某些物种中,至少 ACTH 能诱导胰岛素样生长因子的合成。因此,这些肽生长因子至少介导ACTH对肾上腺皮质细胞增殖和分化的一些作用。人类胎儿肾上腺大量表达胰岛素样生长因子II基因,且具有ACTH依赖性,而在成人肾上腺中,表达量较低且没有ACTH依赖性调节。激素活跃的肾上腺皮质癌和男性化腺瘤大量表达胰岛素样生长因子 II 基因。这种现象与位于人类染色体 11p15.5 上相同基因组印迹基因座上的两个假定肿瘤抑制基因(H19 和 p57KIP2)的表达减少有关。肿瘤坏死因子-α属于调节下丘脑-垂体-肾上腺轴的细胞因子。它是 ACTH 分泌的有效诱导剂,但在肾上腺水平,它似乎主要抑制 ACTH 诱导的类固醇生成以及胰岛素样生长因子 II 的表达。除巨噬细胞外,它还在肾上腺皮质类固醇生成细胞中产生,这表明肿瘤坏死因子-α可能在肾上腺皮质中具有一些自分泌/旁分泌功能。
Insulin-like growth factors I and/or II are expressed in adrenal cells, and modulate their proliferation and steroid hormone synthesis suggesting that they may function as paracrine/autocrine factors. In some species, at least ACTH induces insulin-like growth factor synthesis. Thus, these peptide growth factors mediate at least some of the effects of ACTH on adrenocortical cell proliferation and differentiation. Human fetal adrenals express insulin-like growth factor II gene abundantly and ACTH-dependently, while in adult adrenals, the expression is low and no ACTH dependent regulation has been demonstrated. Hormonally active adrenocortical carcinomas and virilizing adenomas express insulin-like growth factor II gene abundantly. This phenomenon is associated with reduced expression of two putative tumor suppressor genes (H19 and p57KIP2) locating on the same genomically imprinted locus on human chromosome 11p15.5. Tumor necrosis factor-alpha belongs to the cytokines which modulate hypothalamic-pituitary-adrenal axis. It is a potent inducer of ACTH secretion but, at the adrenal level, it seems to mainly inhibit ACTH-induced steroidogenesis and also insulin-like growth factor II expression. It is produced in adrenocortical steroidogenic cells in addition to macrophages, which suggests that tumor necrosis factor-alpha may have some autocrine/paracrine functions in the adrenal cortex.
DOI: 10.1210/edrv-16-1-3
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DOI: --
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影响因子: --
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影响因子: --
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