去胸腺对大鼠糖代谢的影响及地黄寡糖对其的调节作用

目的　观察去胸腺 (Tx)大鼠血糖、血浆胰岛素水平及肝糖原的变化及地黄寡糖 (ROS)对去胸腺大鼠糖代谢的调节作用。方法　① 4wk龄Wistar大鼠手术摘除胸腺 ,测定大鼠去胸腺 3、4、8、15mon后血浆葡萄糖、肝糖原含量、血浆胰岛素水平 ;②观察ROS(2 5 0mg·kg-1,po,× 6 0d)给予去胸腺术 7月后对大鼠脾淋巴细胞增殖、血糖、肝糖原、血浆胰岛素及皮质酮水平的影响。结果　①大鼠去胸腺术后 3～ 15mon血糖无明显变化 ,但从 8mon起肝糖原含量及胰岛素水平均升高 ;②ROS可基本逆转去胸腺大鼠糖代谢变化 ,使之向正常发展 :使肝糖原由高向正常转化 ;血浆胰岛素水平在Tx大鼠有升高趋势 ,ROS可使之恢复正常 ;血浆皮质酮水平在Tx大鼠有下降 ,ROS可使之恢复上升 ;ROS可逆转因去胸腺引起之脾淋巴细胞增殖下降。结论　大鼠去胸腺可引起糖代谢的某些变化 ,ROS可以大部分逆转这种变化

Effects of thymectomy on glucose metabolism in rats and modulation of rehmannia glutinosa oligosaccharides on glucose metabolism in thymectomized rats

AIM To observe the changes of blood glucose level, plasma insulin level and liver glycogen content and regulatory effects of rehmannia glutinosa oligosaccharides(ROS) on glucose metabolism in thymectomized rats. METHODS ①Plasma glucose level, liver glycogen content and plasma insulin level of thymectomized rats were determined three,four, eight and fifteen month after thymectomy operation; ②Effects of ROS (250 mg·kg -1 , po ,×60 d) on spleencyte proliferation,blood glucose level,liver glycogen content, plasma insulin level and plasma corticosterone level in thymectomized rats were investigated seven month after thymectomy. RESULTS From 8 months after thymectomy liver glycogen content and plasma insulin level increased in thymectomized rats, though no obvious changes in blood glucose level were found during the experiment; ②Changes of glucose metabolism in thymectomized rats were largely reversed and normalized with ROS: Increased liver glycogen content turned to be normal,increased plasma insulin level,decreased corticosterone level and decreased splenocyte proliferation in thymectomized rats became normal. CONCLUSION Some changes in glucose metabolism are induced by thymectomy in rats, which can be largely reversed by ROS.