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- W2000826816 abstract "We tested the hypothesis that D-arginine (D-Arg), which is not a substrate for nitric oxide synthase but scavenges reactive oxygen in vitro, is protective in vivo.Rats were made hypertensive by administering angiotensin II (Ang II) (0.7mg kg(-1) per day) for 7 days (Ang II group). Two other groups additionally received either 3 mmol D-Arg (Ang II + D-Arg group) or vitamin C (1g) (Ang II + Vit C group) per day. Sham-operated animals served as controls (n = 6-9). Systolic blood pressure was monitored daily and cardiovascular function determined ex vivo at 7 days.Ang II raised systolic blood pressure to 184mmHg, the increase was slightly attenuated by D-Arg treatment (-17mmHg; P < 0.05 versus Ang II alone) and prevented by Vit C. Acetylcholine-induced coronary relaxation was impaired in the Ang II group (P < 0.05 versus sham), the impairment was no different in the Ang II + D-Arg group, but prevented by Vit C. Likewise, Vit C but not D-Arg ameliorated reperfusion endothelium-dependent relaxation. However, in aortic rings D-Arg slightly improved acetylcholine relaxation (P < 0.05). Oxidative stress load estimated in plasma with thiobarbituric acid reactive substance was higher in the Ang II than the sham group, Vit C abolished the increase, but D-Arg was without effect.D-Arg is weakly antihypertensive in vivo and ameliorates aortic, but not coronary endothelium-dependent relaxation ex vivo. Because D-Arg had no effect on plasma oxidant status, this protection appears to be independent of reactive oxygen scavenging activity." @default.
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- W2000826816 date "2004-10-01" @default.
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- W2000826816 title "In vivo administration of d-arginine: effects on blood pressure and vascular function in angiotensin II-induced hypertensive rats" @default.
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- W2000826816 doi "https://doi.org/10.1016/j.atherosclerosis.2004.05.016" @default.
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