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Effects of Roux-en-Y and Biliopancreatic Bypass on Diabetes
Impact of Bypass on Blood Sugar Control and Glycemic Metabolism
Effects of Roux-en-Y and Biliopancreatic Bypass on Diabetes and Glycemic Metabolism
The Roux-en-Y gastric bypass (RYGBP) and the biliopancreatic diversion (BPD) induce long-term control of type 2 diabetes in morbidly obese individuals. The reasons for such an effect on glycemic metabolism are thought to be secondary to reduced food intake, weight loss and modifications of the enteroinsular axis which is impaired in type 2 diabetic patients.
Influence of Peptides on Diabetes
Both GLP-1 and GIP have an impaired secretin effect in type 2 diabetics, and surgery can restore this function. GIP is a peptide secreted by the duodenal K-cells in response to ingested fat and carbohydrate. In obese type 2 diabetes patients, its receptor on beta-cells is down-regulated. GLP-1 is a peptide secreted by the gut L-cells, and, in type 2 diabetes, its secretion is impaired. Both RYGBP and BPD provide durable GLP-1 delivery, both during fasting and after meal ingestion, inducing L-cell stimulation by early arrival of nutrients in the distal ileum. The secretion of GLP-1 influences glucose metabolism by inhibiting glucagon secretion, stimulating insulin secretion, delaying gastric emptying and stimulating glycogenogenesis.
The early arrival of a meal in the terminal ileum seems to be the common feature of both operations that leads to an improvement in glycemic metabolism and to resolution of type 2 diabetes.
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Laparoscopic or open bariatric surgery, such as gastric banding or bypass is not an easy solution to morbid obesity and weight loss. It is a serious surgical procedure, involving health risks. To produce lasting weight loss it requires a long-term patient commitment to eating a healthy diet and following a regular program of physical exercise. Life-long use of nutritional supplements may also be necessary. So, before deciding, discuss your options fully with your doctor. © 2003-2017 Bariatric-Surgery.Info - Terms - Contact - Information - Resources