硝酸甘油对充血性心力衰竭患者血浆降钙素基因相关肽和内皮素的影响

Effects of nitroglycerin on plasma calcitonin gene-related peptide and endothelin in congestive heart failure

目的 :研究充血性心力衰竭 (CHF)患者血浆降钙素基因相关肽 (CGRP)和内皮素 (ET)的水平以及硝酸甘油的影响 ,探讨硝酸甘油的扩血管和心脏保护机制。方法 :用放射免疫法测定了 4 0例正常人和 4 0例CHF患者外周静脉血浆中CGRP和ET的基础值 ;给予CHF患者以硝酸甘油 2 5～ 5 0 μg /min静脉滴注治疗 ,并在治疗后不同时间采血测CGRP和ET的浓度。结果 :①与对照组相比 ,治疗前CHF患者血浆CGRP浓度明显降低 (P <0 .0 0 1 ) ,ET 1浓度明显增高 (P <0 .0 0 1 ) ;②CHF患者治疗后CGRP浓度升高 (P <0 .0 0 1 ) ,而ET的浓度下降 (P<0 .0 0 1 ) ,伴随有平均动脉压 (MAP)的明显降低 (P <0 .0 0 1 )。结论 :硝酸甘油治疗CHF能促进CGRP的释放 ,不仅可改善血流动力学异常 ,而且可改善神经内分泌的失衡 。

Objective To investigate the plasma calcitonin gene related peptide (CGRP) and endothelin (ET) levels and the effects of nitroglycerin on CGRP and ET in congestive heart failure (CHF), and to make clear the mechanism of nitroglycerin in vasodilation and cardiac protection. Methods The fast blood samples were taken from the peripheral vein of 40 volunteers and 40 CHF patients to estimate the basal level of CGRP and ET. Infusion of nitroglycerin of 25 to 50 μg / min started in the forearm vein of CHF patients. Blood samples were taken at the end of the 1 hour infusion and (12±2) days of nitroglycerin treatment. Plasma concentrations of CGRP and ET were measured by radioimmunoassay. Results In patients with CHF before the treatment, the plasma concentration of CGRP was significantly lower than that in the controls (P<0.001), but the concentration of ET significantly higher than that in the controls (P<0.001). During the nitroglycerin treatment, the plasma concentration of CGRP significantly increased (P<0.001), whereas the concentration of ET significantly decreased (P<0.01). The mean arterial pressure significantly decreased (P<0.001). Conclusion Nitroglycerin can increase the peripheral plasma CGRP level and decrease the concentration of ET when treating CHF. Intravenous nitroglycerin may be beneficial to the improvement of abnormal haemodynamics and neurohormonal derangement.