쥐 흉부대동맥 수축에 미치는 모노- 및 디메칠아르기닌의 영향

• 영문명: In vitro Effects of Mono- and Dimethylarginines on the Contractility of Rat Thoracic Aorta
• 발행기관: 대한약학회
• 저자명: 박연호(Youn Ho Park) 박선미(Sun Mee Park) 김용기(Yong Kee Kim) 이향우(Hyang Woo Lee)
• 간행물 정보: 『약학회지』제37권 제2호 (1993년), 163~171쪽, 전체 9쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 1993.04.30

영문 초록

In order to study the functions of vascular endothelial nitric oxide(NO) generating system, we examined the effects of monomethylarginine(MMA) and dimethylarginine(DMA)(asym., sym.), arginine analogues, on modulation of vascular tone. Also, the concentrations of endogenous arginie and MMA were measured by HPLC in rat aortic tissues. The results were as follows. 1. The maximum relaxation induced by Ach (1.5 X 10-6M) was 80% of the contractility of rings of rat aorta induced by phenylephrine and L-Arg causes endothelium-dependent relaxation of the aorta precontracted with phenylephrine and these relaxation were concentration-dependent. 2. Endothelium-dependent contractility of rings of rat aorta induced by MMA (100mcM), DMA (asym., 100mcM) and DMA (sym., 100mcM) were 25.5%, 27.5% and 16.5% of that induced by phenylephrine respectively. 3. The relaxation of rat aortic ring induced by L-Arg was inhibited by MMA, DMA(asym.) and DMA(sym.). The degrees of inhibition induced by MMA, DMA(asym.) and DMA(sym.) were 45.7%, 37.1% and 18.3%, respectively. 4. The endogenous arginine and monomethylarginine contents in rat aorta were 83pmoles/mg wet tissue, and 34.9pmoles/mg wet tissue. After stimulation with Ach, the concentrations of L-Arg and MMA were significantly decreased. These results suggest that there are the strong relationships between the endogenous L-Arg and methylated arginines and NO-generating system.

키워드

Nitric oxide EDRF Arginine Monomethylarginine Dimethylarginine(asym., sym.).