摘要
目的 探讨糖尿病大鼠胃窦平滑肌细胞内钙离子(Ca2 + )的改变及其意义。方法 5 0只大鼠随机分为对照组 (n =2 0 )和糖尿病模型组 (n =30 ) ,用链尿佐菌素建立大鼠糖尿病模型 ,3个月后测定胃排空时间 ,并用流式细胞仪测定平滑肌细胞凋亡发生率 ,用激光共聚焦方法测定细胞内Ca2 + 浓度。结果 与对照组大鼠相比 ,模型组大鼠胃排空时间明显延长(P <0 0 1) ,平滑肌细胞凋亡发生率及细胞内Ca2 + 浓度明显增加 (P <0 0 1)。结论 糖尿病大鼠胃窦平滑肌细胞内Ca2 + 增加 ,从而使平滑肌细胞受损 ,平滑肌功能发生相应改变。
Objective To study the change in cytosolic Ca 2+ in smooth muscle cells in gastric antrum of diabetic rat. Methods Rats were randomly divided into diabetic group and control group. Gastric empty time was determined 3 months after diabetes was reproduced in rats, the apoptosis rate of smooth muscle cells in the gastric antrum was assessed by flow cytometry, and the content of cytosolic Ca 2+ in smooth muscle cells was measured by laser scanning confocal microscopy. Results In diabetic rats, gastric emptying was significantly delayed. Compared the normal rats, the content of cytosolic Ca 2+ in smooth muscle cells from the antrum of diabetic rats was increased. The apoptosis rate of smooth muscle cells in the antrum of diabetic rats was 15%, and it was higher than that in normal rats. Conclusion With the increase in the content of cytosolic Ca 2+ in smooth muscle cells, smooth muscles were damaged and therefore their contraction was also impaired.
出处
《解放军医学杂志》
CAS
CSCD
北大核心
2004年第10期862-864,共3页
Medical Journal of Chinese People's Liberation Army
关键词
细胞内钙离子
糖尿病
胃
平滑肌
Ca 2+
diabetes mellitus
stomach
smooth muscle
