Title : Estradiol induces the calcium-dependent translocation of endothelial nitric oxide synthase.

Pub. Date : 1999 Mar 16

PMID : 10077589






10 Functional Relationships(s)
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1 Estradiol induces the calcium-dependent translocation of endothelial nitric oxide synthase. Estradiol nitric oxide synthase 3 Bos taurus
2 Using quantitative immunofluorescence imaging approaches, we have investigated the effect of estradiol on the subcellular targeting of endothelial nitric oxide synthase (eNOS) in bovine aortic endothelial cells. Estradiol nitric oxide synthase 3 Bos taurus
3 Using quantitative immunofluorescence imaging approaches, we have investigated the effect of estradiol on the subcellular targeting of endothelial nitric oxide synthase (eNOS) in bovine aortic endothelial cells. Estradiol nitric oxide synthase 3 Bos taurus
4 Within 5 min after the addition of estradiol, most of the eNOS translocates from the membrane to intracellular sites close to the nucleus. Estradiol nitric oxide synthase 3 Bos taurus
5 After estradiol addition, a transient rise in intracellular Ca2+ concentration precedes eNOS translocation. Estradiol nitric oxide synthase 3 Bos taurus
6 Both the Ca2+-mobilizing and eNOS-translocating effects of estradiol are completely blocked by the estrogen receptor antagonist ICI 182,780, and the intracellular Ca2+ chelator 1,2-bis-(o-aminophenoxy)ethane-N,N,N",N"-tetraacetic acid (BAPTA) prevents estradiol-induced eNOS translocation. Estradiol nitric oxide synthase 3 Bos taurus
7 Both the Ca2+-mobilizing and eNOS-translocating effects of estradiol are completely blocked by the estrogen receptor antagonist ICI 182,780, and the intracellular Ca2+ chelator 1,2-bis-(o-aminophenoxy)ethane-N,N,N",N"-tetraacetic acid (BAPTA) prevents estradiol-induced eNOS translocation. Estradiol nitric oxide synthase 3 Bos taurus
8 Both the Ca2+-mobilizing and eNOS-translocating effects of estradiol are completely blocked by the estrogen receptor antagonist ICI 182,780, and the intracellular Ca2+ chelator 1,2-bis-(o-aminophenoxy)ethane-N,N,N",N"-tetraacetic acid (BAPTA) prevents estradiol-induced eNOS translocation. Estradiol nitric oxide synthase 3 Bos taurus
9 Use of the nitric oxide-specific dye diaminofluorescein shows that estradiol treatment increases nitric oxide generation by endothelial cells; this response is blocked by ICI 182,780 and by the eNOS inhibitor Nomega-nitro-L-arginine. Estradiol nitric oxide synthase 3 Bos taurus
10 These results show that estradiol induces subcellular translocation of eNOS by a rapid, Ca2+-dependent, receptor-mediated mechanism, and they suggest a nongenomic role for estrogen in the modulation of NO-dependent vascular tone. Estradiol nitric oxide synthase 3 Bos taurus