Antishock effect of arginine vasopressin and its relationship with Rho kinase
- VernacularTitle:精氨酸血管加压素抗失血性休克作用及其与Rho kinase的关系
- Author:
Yuqiang FANG
;
Tao LI
;
Liangming LIU
- Publication Type:Journal Article
- Keywords:
hemorrhagic shock;
vascular reactivity;
calcium sensitivity;
Rho kinase;
arginine vasopressin
- From:Journal of Third Military Medical University
2003;0(13):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the relationship of antishock effect of arginine vasopressin(AVP) on hemorrhagic shock and its relationship with Rho kinase.Methods Hemorrhagic shock(40 mmHg for 2 h) Wistar rats were treated respectively by AVP(0.4 U/kg),Rho kinase specific inhibitor,Y-27632(30 ?g/kg),or these 2 reagents.The pressor effect of norepinephrine(NE) on these rats and the contractility of their isolated superior mesenteric artery(SMA) were observed.Isolated SMAs from hemorrhagic shock rats were adopted to observe the effects of AVP on vascular reactivity and calcium sensitivity and its relationship to Rho kinase with an isolated organ perfusion system.Results AVP at the concentration of 0.4 U/kg significantly improved the pressor effect of NE and the contractile response of SMA.While,Y-27632(30 ?g/kg) abolished these beneficial effects of AVP.The vascular reactivity and calcium sensitivity of SMA were significantly decreased following hemorrhagic shock.AVP at the concentration of 0.5 and 5 nmol/L significantly increased the decreased vascular reactivity and calcium sensitivity.These effects of AVP were abolished by Y-27632(10 ?mol/L).Conclusion Rho kinase may take part in the action of AVP on hemorrhagic shock via improving shock induced vascular hyporeactivity and calcium desensitization.
