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• W4205793645 endingPage "104309" @default.
• W4205793645 startingPage "104309" @default.
• W4205793645 abstract "The aim of present study was to study whether the vascular endothelial growth factor receptor 2 (VEGFR2) mediates hydrogen sulfide (H2S)-induced relaxation of the rat cerebral vasculature.Relaxation of cerebral basilar artery (CBA) and vascular smooth muscle cells (VSMCs) was measured by using a pressure myograph system and image analysis system, respectively. The intracellular calcium concentration ([Ca2+]i) in VSMCs was detected using fluorescence imaging analysis.We found that H2S donor NaHS induced significant relaxation of VSMCs from the CBA of wild type rat, but in VEGFR2 knockdown VSMCs, NaHS-induced relaxation reduced markedly. In addition, NaHS-induced vasodilation of rat CBA also attenuated obviously when the expression of VEGFR2 was knocked down in vivo. In addition, pretreatment with the VEGFR2 blocker SU5416 likewise lowered the NaHS-induced relaxation of rat CBA. Nevertheless, the VEGFR2 agonist, vascular endothelial growth factor 164 (VEGF164), induced a concentration-dependent relaxation of CBA, which is similar to the effect of NaHS. Furthermore, we found that both NaHS and VEGF164 significantly inhibited the U46619-induced increase of [Ca2+]i fluorescence intensity in the VSMCs. However, the inhibitory effect of NaHS on the [Ca2+]i fluorescence intensity in VSMCs was markedly inhibited by pretreatment with SU5416 or VEGFR2 knockdown.These findings indicated that H2S-induced CBA dilation and reduction of [Ca2+]i in VSMCs occur by acting on VEGFR2." @default.
• W4205793645 created "2022-01-25" @default.
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• W4205793645 date "2022-05-01" @default.
• W4205793645 modified "2023-10-05" @default.
• W4205793645 title "VEGFR2 in vascular smooth muscle cells mediates H2S-induced dilation of the rat cerebral basilar artery" @default.
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• W4205793645 doi "https://doi.org/10.1016/j.mvr.2021.104309" @default.
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