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- W2900900488 abstract "Abstract We previously showed that decreased levels of intracellular nitric oxide (NO) contribute to the hyperproliferation of vascular smooth muscle cells (VSMC) from spontaneously hypertensive rats (SHR). The present study investigates if elevation of intracellular levels of NO by in vivo treatment of SHR with NO donor, sodium nitroprusside (SNP) that was shown to attenuate hypertension could attenuate the hyperproliferation of VSMC and identify the molecular mechanisms. Intraperitoneal injection of SNP (0.5 mg/kg BW) into 8-week-old SHR and WKY rats twice a week for two weeks increased significantly the intracellular levels of NO in aortic VSMC and resulted in the attenuation of hyperproliferation of VSMC from SHR to control levels. The antiproliferative effect of SNP was associated with the restoration of the overexpression of cell cycle proteins, cyclins D1, E, Cdk2, Cdk4, phosphorylated pRB and decreased expression of Cdk inhibitors p21 Cip1 and p27 Kip1 towards control levels. In addition, SNP treatment also attenuated the overexpression of angiotensin II receptor type 1 (AT1) receptor, phosphorylation of c-Src, EGF-R, PDGF-R, IGF-IR and ERK1/2 in VSMC from SHR to control levels. These results suggest that the augmentation of intracellular levels of NO elicits antiproliferative effect that may be mediated through its ability to inhibit the enhanced expression of AT1 receptor, activation of c- Src, growth factor receptors and MAP kinase signaling and overexpression of cell cycle proteins." @default.
- W2900900488 created "2018-11-29" @default.
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- W2900900488 date "2018-11-19" @default.
- W2900900488 modified "2023-10-03" @default.
- W2900900488 title "Elevation of intracellular levels of nitric oxide in SHR attenuates hyperproliferation of vascular smooth muscle cells through the inhibition of AT1 receptor expression and c-Src/growth factor receptor signaling pathways" @default.
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- W2900900488 doi "https://doi.org/10.1101/474163" @default.
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