胃转流术对非肥胖性2型糖尿病患者葡萄糖负荷后血糖和胰高血糖素样肽1水平的影响

目的 观察胃转流术对非肥胖性2型糖尿病的疗效及其对胰高血糖素样肽1(GLP-1)的影响.方法 前瞻性入选行胃转流术的32例胃溃疡合并非肥胖性2型糖尿病患者,检测术前及术后1周、1、3、6个月体质量指数(BMI)、口服葡萄糖耐量试验后0、30、60、120、180 min血糖和GLP-1水平,分析术后并发症和6个月时糖尿病转归情况.结果 术前卒腹血糖为(9.5±1.0)mmol/L,术后分别降至1周时(7.4±1.0)mmol/L、1个月时(6.5±1.2)mmol/L、3个月时(8.0±1.6)mmol/L及6个月时(5.8±1.0)mmol/L,P＜0.01;术前口服葡萄糖耐量试验血糖峰值为(17.5±2.0)mmol/L,术后分别降至(12.6±1.7)mmol/L、(11.0±1.7)mmol/L、(12.4±1.7)mmol/L和(10.8±1.7)mmol/L,P＜0.01;术前口服葡萄糖耐量试验血糖曲线下面积为(2455±281)mmol·min/L,术后分别降至(1842±237)mmol·min/L、(1638±261)mmol·min/L、(1828±239)mmol·min/L和(1541±253)mmol·min/L,P＜0.01.术前口服葡萄糖耐量试验过程中GLP-1峰值为(20±3)pmol/L,术后分别升至(83±15)pmol/L、(86±20)pmol/L、(87±22)pmol/L和(92±20)pmol/L,P＜0.01;术前口服葡萄糖耐量试验过程中GLP-1曲线下面积为(2457±395)pmol·min/L,术后分别升至(6499±1227)pmol·min/L、(7275±1475)pmol·min/L、(7307±1575)pmol·min/L和(7974±1594)pmol·min/L,P＜0.01,术后各时间点BMI较术前无显著变化(P＞0.05).术后出现切口感染1例,顽固性呃逆1例,术后6个月糖尿病总控制率均值为78%.结论 胃转流术可显著降低非肥胖性2型糖尿病患者血糖,改善口服葡萄糖耐量试验,胃转流术控制血糖可能与增加GLP-1释放进而促进胰岛素分泌有关,其对血糖的控制不依赖于体草的降低.

Effects of gastric bypass on plasma glucose and GLP-1 in patients with diabetes mellitus

Objective To investigate the effect of gastric bypass on plasma glucose and glucagonlike peptide-1 (GLP-1) during oral glucose tolerance test (OGTT) in non-obese type 2 diabetes mellitus (T2DM) patients suffering from gastric ulcer necessitating a gastrectomy.Methods Thirty-two T2DM patients undergoing gastric bypass (GBP) for gastric ulcer were enrolled in this study.All patients underwent a 3-h OGTT with 75 g glucose (in a total volume of 300 ml) preoperatively and 1 week,1 month,3 months and 6 months after operation.Plasma glucose (PG) and GLP-1 concentrations were measured before (baseline) and then 30,60,120,and 180 minutes after OGTT.Areas under curves (AUC) were calculated by trapezoidal integration.The turnover of the diabetes conditions six months after the surgery were also measured.Results FPG level was (9.5±1.0) mmol/L before surgery,and significantly decreased to (7.4±1.0) mmol/L,one week,(6.5±1.2) mmol/L,one month,(8.0±1.6) mmol/L three months and (5.8±1.0) mmol/L,six months respectively after GBP(P ＜0.01).Peak level and AUC of PG during OGTT significantly decreased at aforementioned four time points after sugery (P ＜ 0.01).Oral glucosestimulated peak levels of GLP-1 was (20±3) pmol/L before GBP,and markedly increased to (83±15)pmol/L,(86±20) pmol/L,(87±22) pmol/L and (92±20) pmol/L respectively after GBP(P＜0.01).Stimulated AUC levels of GLP-1 significantly increased from (2457±395) pmol· min/L to (6499±1227)pmol·min/L,to (7275±1475) pmol·min/L,to (7307±1575) pmol·min/L and to (7974±1594)pmol· min/L during the study respectively(P ＜0.01).BMI levels were similar before and after GBP(P＞0.05).Two patients experienced complications(infection of incision and intractable hiccup).T2DM control rate was 78% when assessed at a time point of six months later.Conclusion Gastric bypass is effective in terms of glucose control and improving gucose tolerance in non-obese T2DM,and the hypoglycemic effect may be contributed to more GLP-1 secretion after GBP,but not to weight loss.