Propofol depresses angiotensin II-induced cell proliferation in rat cardiac fibroblasts

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Title:	Propofol depresses angiotensin II-induced cell proliferation in rat cardiac fibroblasts
Authors:	鄭志鴻(CHENG, TZU-HURNG);梁育民;(Cheung, Chi-Wai);(Chen, Cheng-Hsien);(Chen, Yen-Ling);黃家樂(Kar-Lok Wong)*
Contributors:	生命科學院生物科技學系
Date:	2010-01
Issue Date:	2009-08-19 16:56:53 (UTC+8)
Abstract:	Background: Propofol may have beneficial effects on the prevention of angiotensin II (Ang II)-induced cardiac fibroblast proliferation via its antioxidative properties. The authors hypothesized that propofol may alter Ang II-induced cell proliferation and aimed to identify the putative underlying signaling pathways in rat cardiac fibroblasts. Methods: Cultured rat cardiac fibroblasts were pretreated with propofol then stimulated with Ang II; cell proliferation and endothelin-1 gene expression were examined. The effect of propofol on Ang II-induced nicotinamide adenine dinucleotide phosphate-oxidase activity, reactive oxygen species formation, extracellular signal-regulated kinase phosphorylation, and activator protein 1-mediated reporter activity were also examined. The effect of propofol on nitric oxide production and protein kinase B and endothelial nitric oxide synthase phosphorylations were also tested to elucidate the intracellular mechanism of propofol in proliferation. Results: Ang II (100 nm) increased cell proliferation and endothelin-1 expression, which were partially inhibited by propofol (10 or 30 [mu]m). Propofol also inhibited Ang II-increased nicotinamide adenine dinucleotide phosphate-oxidase activity, reactive oxygen species formation, extracellular signal-regulated kinase phosphorylation, and activator protein 1-mediated reporter activity. Propofol was also found to increase nitric oxide generation and protein kinase B and nitric oxide synthase phosphorylations. Nitric oxide synthase inhibitor (N-nitro-l-arginine methylester) and the short interfering RNA transfection for protein kinase B or endothelial nitric oxide synthase markedly attenuated the inhibitory effect of propofol on Ang II-induced cell proliferation. Conclusions: The authors' results suggest that propofol prevents cardiac fibroblast proliferation by interfering with the generation of reactive oxygen species and involves the activation of the protein kinase B-endothelial nitric oxide synthase-nitric oxide pathway.
Relation:	ANESTHESIOLOGY 112(1):108~118
Appears in Collections:	[Department of Biological Science and Technology] Journal articles

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