地尔硫对大鼠胰岛素水平的影响

Effects of diltiazem on insulin level in rats

目的 观察钙拮抗剂地尔硫 (Dil)对空腹大鼠、葡萄糖负荷大鼠以及肾上腺素诱发高血糖大鼠血浆胰岛素水平的影响。方法 采用放射免疫测定法测定血浆胰岛素含量。结果 空腹大鼠灌胃给予 10mg·kg-1和 10 0mg·kg-1Dil后 ,胰岛素水平升高 ;与对照组相比 ,Dil 10 0mg·kg-1给药后 30min使胰岛素水平增加了 1 31倍。在糖耐量试验中 ,Dil两剂量均升高胰岛素水平。在肾上腺素诱发高血糖大鼠 ,Dil 10 0mg·kg-1仅在给药后 1h轻度升高血浆胰岛素水平。结论 Dil升高空腹大鼠和葡萄糖负荷大鼠血浆胰岛素水平 ,该作用除与药物诱发的血糖升高有关外 ,可能也与Dil的某些尚未发现的作用有关。

AIM The effects of calcium antagonist diltiazem on plasma insulin levels were investigated in rats. METHODS Plasma insulin was measured with radioimmunoassay method. RESULTS In the fasting rat, plasma insulin levels were significantly increased after ig diltiazem 10 mg·kg -1 and 100 mg·kg -1 , and the level of plasma insulin was increased by 131% 30 min after administration of diltiazem 100 mg·kg -1 in comparison with that of control group. Diltiazem increased the plasma insulin level markedly in glucose tolerance test of the rat. In the hyperglycemia rat induced by adrenaline, diltiazem 100 mg·kg -1 weakly increased the plasma insulin level only at 1 h after administration. CONCLUSION Diltiazem increases the plasma insulin levels in the fasting rat and glucose loaded rat. The increase of plasma insulin level induced by diltiazem is due to the hyperglycemic action of diltiazem and other effect, probably a direct or an indirect insulin release action on pancreas of the rat.