Adrenomedullin as an autocrine/paracrine apoptosis survival factor for rat endothelial cells.

Adrenomedullin as an autocrine/paracrine apoptosis survival factor for rat endothelial cells.
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肾上腺髓质素作为大鼠内皮细胞的自分泌/旁分泌凋亡生存因子。

DOI:
10.1210/endo.138.6.5197
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发表时间:
1997
期刊:
影响因子:
4.8
通讯作者:
Y. Hirata
Y. Hirata
中科院分区:
医学2区
文献类型:
--
作者:
H. Kato;M. Shichiri;F. Marumo;Y. Hirata

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肾上腺髓质素是最近从人嗜铬细胞瘤中分离出的一种有效的血管舒张/舒张肽。我们在这里证明了这种肽作为大鼠内皮细胞凋亡存活因子的新作用。当呈现静止的血清剥夺,一部分内皮细胞培养物显示出凋亡的形态和生化特征。肾上腺髓质素显着抑制细胞凋亡,而不诱导细胞增殖。含有肾上腺髓质素高亲和力结合位点的大鼠内皮细胞表达肾上腺髓质素基因并将肽释放到培养基中。此外,preimmune兔血清防止细胞凋亡,而兔抗肾上腺髓质素抗血清部分,但显着,废除preimmune血清的保护作用,这表明其自分泌/旁分泌的作用。虽然肾上腺髓质素诱导细胞内cAMP的形成,其他cAMP升高激动剂,如前列腺素I2和毛喉素,不影响细胞凋亡。此外,
Adrenomedullin is a potent vasorelaxant/hypotensive peptide recently isolated from human pheochromocytoma. We demonstrate here a novel role of this peptide as an apoptosis survival factor for rat endothelial cells. When rendered quiescent by serum deprivation, a fraction of endothelial cell cultures showed morphological and biochemical features characteristic of apoptosis. Adrenomedullin significantly suppressed apoptosis without inducing cell proliferation. Rat endothelial cells that contained high affinity binding sites for adrenomedullin expressed adrenomedullin gene and released the peptide into culture media. Addition of preimmune rabbit serum prevented apoptosis, whereas rabbit antiadrenomedullin antiserum partially, but significantly, abrogated the protective effect of the preimmune serum, suggesting its autocrine/paracrine role. Although adrenomedullin induced intracellular cAMP formation, other cAMP-elevating agonists, such as prostaglandin I2 and forskolin, did not affect apoptosis. Furthermore,...
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