红曲对L-硝基精氨酸高血压大鼠降压作用初探

Hypertension Lowering Study on L-nitro-arginine Hypertension Model Rats by Monascus Administration

在本实验室建立L-硝基-精氨酸(L-NNA)高血压大鼠模型,探讨红曲(monascus)对该类高血压模型大鼠的降压功效。并考察其血中内皮素(ET)和降钙素基因相关肽(CGRP)含量变化。雄性Wistar大鼠共20只正常对照组(C组)8只;L-NNA模型对照组(L组)6只;红曲组(L+M组)6只。使用放免法测定血浆ET和CGRP含量。L-NNA模型对照组与正常对照组相比,血浆ET明显升高(p<0.05);血浆CGRP略有下降但不具有统计学意义(p=0.8342);ET/CGRP比值明显升高(p<0.05)。红曲组血浆ET含量极显著低于L-NNA模型对照组(p<0.001)。实验结果提示血中ET的大幅度上升导致ET与CGRP之间平衡被打破,这一变化可能参与了L-NNA引起的大鼠高血压模型的产生;红曲有可能是通过降低L-NNA高血压模型大鼠血中ET水平而发挥降压作用的,但其作用机理有待进一步研究。

The purpose of the Study was to investigate the effect of monascus on lowering hypertension and the changes ofplasma endothelin (ET) value and calcitonin gene-related peptide(CGRP)value in L-nitro-arginine(L-NNA)hypertension modelrats. There were 20 male Wistar rats divided into 3 groups:control group(group C)8 cases,L-NNA hypertension group(groupL)6 cases and L-NNA+monascus group(group L+M)6 cases. The results showed ET and ET/CGRP were increased markedlyin L-NNA hypertension model rats(p<0.05), while CGRP showed no significant difference between group C and group L(p=0.8342).ET was reduced remarkably in L+M group(p<0.001).Therefore,increasing ET and ET/CGRP might lead to thehypertension of rats. Monascus could lower hypertension by reducing blood ET value.