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- W2034320492 abstract "The role of gap junctions in endothelium-derived hyperpolarizing factor (EDHF)-mediated relaxation of human arteries was assessed using connexin mimetic peptides (CMPs) designated 37,43 Gap27, 40 Gap27, and 43 Gap26 according to homology with the major vascular connexins (Cx37, Cx40, and Cx43). Resistance arteries were obtained from subcutaneous fat biopsies of healthy pregnant women undergoing elective cesarean section. Endothelium-dependent vasodilatation to bradykinin (BK) was assessed using wire myography. N ω -nitro-l-arginine methyl ester (l-NAME) and indomethacin (nitric oxide synthase and cyclooxygenase inhibitors, respectively) attenuated maximal relaxation to BK (R max ) by ∼50%. Coincubation with l-NAME, indomethacin, and the combined CMPs ( 37,43 Gap27, 40 Gap27, and 43 Gap26) almost abolished relaxation to BK (R max = 12.2 ± 3.7%). In arteries incubated with l-NAME and indomethacin, the addition of either 37,43 Gap27 or 40 Gap27 had no significant effect on R max , whereas 43 Gap26 caused marked inhibition (R max = 21 ± 6.4%, P = 0.005 vs. l-NAME plus indomethacin alone) that was similar to that of the triple combination. Endothelium-independent vasorelaxation was unaffected by CMPs, l-NAME, or indomethacin. Immunohistochemistry demonstrated Cx37, Cx40, and Cx43 expression in the endothelium and vascular smooth muscle. In pregnant women, EDHF-mediated vasorelaxation of subcutaneous resistance arteries is dependent on Cx43 and gap junctions." @default.
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- W2034320492 date "2007-02-01" @default.
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- W2034320492 title "Connexin 43 mediates endothelium-derived hyperpolarizing factor-induced vasodilatation in subcutaneous resistance arteries from healthy pregnant women" @default.
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- W2034320492 doi "https://doi.org/10.1152/ajpheart.00797.2006" @default.
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