Upregulation of Rho-kinase (ROCK-2) expression and enhanced contraction to endothelin-1 in the mesenteric artery from lipopolysaccharide-treated rats

European Journal of Pharmacology
Kansu BüyükafşarElif Ozveren

Abstract

Effects of bacterial lipopolysaccharide (Escherichia coli serotype, 055:B5, 20 mg kg(-1), i.p., for 6 h) and a Rho-kinase inhibitor, (+)-(R)-trans-4-(1-aminoethyl)-N-(4-pyridyl) cyclohexanecarboxamide dihydrochloride monohydrate, Y-27632 (10(-9)-10(-5) M) were investigated on the contractile responses of the rat mesenteric artery to phenylephrine (10(-9)-3 x 10(-5) M), angiotensin-2 (10(-10)-10(-6) M) and endothelin-1 (10(-10)-10(-7) M). Moreover, alteration in the level of Rho-kinase (ROCK-2) expression was examined in the superior mesenteric artery obtained from saline- and lipopolysaccharide-treated rats by Western blotting. Endotoxemic rat mesenteric rings exhibited no different contractions to phenylephrine and angiotensin-2 but augmented contractile activity to endothelin-1. In the mesenteric artery obtained from the endotoxemic rats, acetylcholine-induced vasorelaxation did not differ; pD2 value for acetylcholine was 7.85+/-0.12 in the endotoxemic rings; however, it was 7.81+/-0.15 in the control rings (P>0.05). Y-27632 induced relaxation, which was the same in the control arteries as in endotoxemic ones when contracting agent was phenylephrine. However, when endothelin-1 was used to precontract the rings, Y-27632 produc...Continue Reading

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Citations

Nov 16, 2007·Current Atherosclerosis Reports·James K Liao
Aug 2, 2007·Journal of Cardiovascular Pharmacology·James K LiaoKensuke Noma
Jun 6, 2009·Liver International : Official Journal of the International Association for the Study of the Liver·Martin HennenbergTilman Sauerbruch
Dec 24, 2015·British Journal of Pharmacology·Tzu-Ling TsengTony J F Lee
Jun 29, 2010·The American Journal of Pathology·Andrei I IvanovAsma Nusrat
Jun 6, 2006·European Journal of Pharmacology·Kansu BüyükafşarFazilet Aksu
Feb 20, 2009·American Journal of Physiology. Renal Physiology·Catherine Meyer-SchwesingerTobias N Meyer
Aug 28, 2021·Cells·Maria Luísa da Silveira Hahmeyer, José Eduardo da Silva-Santos

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