双峰型胰岛素释放曲线的初步分析
Preliminary analysis of bimodal insulin release curve
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摘要: 目的 初步探讨双峰型胰岛素释放曲线(IRC)出现的原因。方法 以63例双峰型IRC2型糖尿病患者为双峰组、18名正常志愿者为对照组,进行口服葡萄糖耐量试验、胰岛素释放试验和C-肽释放试验,并计算稳态模型指标。结果 两组受试者的空腹血糖、空腹胰岛素、1 h胰岛素、空腹C-肽、1 h C-肽、Homa-1R差异无统计学意义;0.5 h血糖、1 h血糖、2 h血糖、3 h血糖、0.5 h胰岛素、2 h胰岛素、3 h胰岛素、0.5 hC-肽、2 h C-肽、3 hC-肽、血糖曲线下面积、胰岛素曲线下面积、C-肽曲线下面积、胰岛素分泌指数、△I30/△G30:双峰组>对照组,△C-P30/△G30:双峰组<对照组。结论 双峰组患者胰岛第一分泌相过度代偿,0.5 h胰岛素形成假性峰值而导致血糖增高,胰岛第二分泌相形成正常峰值,此组患者应为糖耐量受损。
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关键词:
- 糖尿病,2型 /
- 糖耐量受损 /
- 双峰型胰岛素释放曲线
Abstract: Objective To investigate the reason for the appearance of bimodal insulin release curve (IRC).Methods Sixty-three cases of bimodal pattern of IRC (double hump group) were selected as experimental group; 18 normal volunteers as control group. Oral glucose tolerance test, insulin release test and C-peptide release test were performed, and the index of steady-state model was calculated.Results There were no significant difference among the two groups in fasting insulin, 1 hC-peptide, fasting plasma glucose, Homa-insulin resistance. 0.5 hIns:double hump group > control group. Fasting C-peptide:control 1 group > double hump group > normal Group. 0.5 h C-peptide:double hump group and control group > normal group. Fasting plasma glucose:normal group > double hump group and control group. 0.5 h plasma gulcose:normal group > double hump group > control group. glucose area under curve:normal group > double hump group > control group; △I30△ G30:double hump group > control group > normal group. insulin area under curve and C-peptide area under curve:double hump group > control group and normal group.There were significant difference among the results.Conclusion s The pancreatic island has an overcompensation in the first secretion phase in double hump group, and the insulin displayed the pseudopeak value at 0.5 h which lead to the increase of blood glucose. The pancreatic island has a normal peak value in the second secretion phase, the patients in this group exsits impaired glucose tolerance. -
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