Role of 3-nitrotynosine in Escherichia coli LPS-induced vascular hyporeactivity in rats
- VernacularTitle:3-硝基酪氨酸在细菌内毒素诱导大鼠血管低反应性中的介导作用
- Author:
Liang JING
;
Jing LI
- Publication Type:Journal Article
- Keywords:
Shock;
Uric acid;
Melatonin;
Nitrotynosine
- From:Chinese Journal of Pathophysiology
1986;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
AIM: To observe the pathological role of 3-nitrotynosine (3-NT) on Escherichia coli LPS-induced vascular hyporeactivity in rats and the therapeutic effect of antioxidants. METHODS: Forty male SD rats weighting from 200 g to 250 g were randomly divided into four groups: the control group (n=10); LPS shock group (n=10); uric acid-treated group (n=10); melatonin-treated group (n=10). 6 h after LPS shock, phenylephrine (0.5-2.5 ?g?kg -1) was applied intravenously to all groups and the percentage increase in MAP was detected, respectively. The concentration-response curve of aorta rings from all groups rats were obtained by cumulative addition of phenylephrine (PE), and PE E_ max, EC_ 50 were calculated. The concentrations of plasma malondialdehyde (MDA), nitrate/nitrite and 3-NT were assayed in all groups 6 h after LPS shock. RESULTS: The MAP level induced by PE significantly decreased to 54.60% in LPS shock rats compared with the control (P
