不同给药途径下联麦氧钒对糖尿病大鼠的降血糖作用

Hypoglycemic effects of bis(maltolato)oxovanadium administered by different routes upon diabetic rats

目的 :研究不同给药途径下联麦氧钒 [bis(maltolato)oxovanadium ,BMOV]对糖尿病大鼠的降血糖作用 ,并初步探讨其降糖机制。方法 :建立四氧嘧啶 (alloxan)型糖尿病大鼠模型 ,分别采用腹腔注射、灌胃、皮下注射、静脉快速注射和静脉慢速注射 (7～ 8min)等 5种给药方式 ,通过血糖测定观察糖尿病大鼠单剂量给予BMOV溶液后的降血糖作用 ,并测定血浆胰岛素水平。结果 :除静脉注射给药以外 ,其他方式给予BMOV溶液后都使糖尿病大鼠的血糖明显下降 ,而且表现为长效的降血糖作用。糖尿病大鼠的进水量和进食量明显减少。血浆胰岛素水平没有明显增加。高剂量给药时 ,BMOV可引起部分低血糖和腹泻现象 ,未见其它明显的毒副作用。结论 :灌胃、皮下注射、腹腔注射BMOV溶液对糖尿病大鼠具有较好的长效降血糖作用 ,而BMOV的降血糖作用并不是通过提高大鼠体内胰岛素的水平来实现的。

Objective:To study the hypoglycemic effects of bis(maltolato) oxovanadium (Ⅳ) (BMOV) after administration on diabetic rats by different routines, and its possible mechanisms. Methods: Diabetic rats were created by intraperitoneal administration of Alloxan. BMOV was administered by single intraperitoneal injection, oral gavage, subcutaneous injection, bolus intravenous injection, or slow bolus intravenous injection(7-8 min). Plasma glucose levels were determined with blood glucose assay kits using the glucose oxidase method, while the plasma insulin concentrations were monitored by the insulin assay kits using Radioimmunoasssy (RIA) method. Results: Plasma glucose levels were significantly decreased after administration of BMOV by all routes except intravenous injection. Food and fluid intake by the diabetic rats were also reduced. There was no significant increase in plasma insulin concentration. Conclusion: BMOV administered by oral gavage, subcutaneous injection and intraperitoneal injection has obvious effect of decreasing plasma glucose levels on diabetic rats, and the hypoglycemic effect of BMOV was not achieved by increasing the plasma insulin concentration.