摘要
本工作在大鼠止血带休克(ToS)模型上观察NO前体L-精氨酸L-Arg,NO合成阻断剂L-NNA及可溶性鸟苷酸环化酶抑制剂亚甲兰(MB)对离体胸主动脉舒缩活动的影响。发现止血带休克大鼠离体灌流的主动脉对去甲肾上腺素的反应性降低。血管组织cGMP含量增加。L-Arg可增强这一变化,而L-NNA或MB可减轻上述变化,而且这些药物作用不受血管内皮是否存在的影响。实验结果提示。
This work was done on rat tourniquet shock(ToS) model. It was found that reactivity of isolated perfused aortic ring to noradrenaline decreased, while cGMP content of the aortic tissue increased. These changes could be potentiated by perfusion with L arginine (NO precursor). On the other side, when the aortic ring was perfused with L NNA (NO synthesis inhibitor) or methylene blue (soluble cGMPase inhibitor), the changes could be attenuated. The effect of these drugs are independent of the presence of vascular endothelium. The results suggest that non endothelium derived NO like relaxing factor may be one of the factors causing low vascular reactivity of the ToS animals.
出处
《中国应用生理学杂志》
CAS
CSCD
1997年第3期261-263,共3页
Chinese Journal of Applied Physiology
基金
煤炭科学基金