Gastric bypass prevents diabetes in genetically modified mice and chemically induced diabetic mice.
Chenyu ZhuRui XuYuxin LiMichael S AndradeDeng Ping YinPublished in: PloS one (2021)
Obese subjects have increase probabilities of developing type 2 diabetes (T2D). In this study, we sought to determine whether gastric bypass prevents the progression of prediabetes to overt diabetes in genetically modified mice and chemically induced diabetic mice. Roux-en-Y gastric bypass (RYGB) was performed in C57BL/KsJ-db/db null (BKS-db/db,) mice, high-fat diet (HFD)-fed NONcNZO10/LtJ (NZO) mice, C57BL/6 db/db null (B6-db/db) mice and streptozotocin (STZ)-induced diabetic mice. Food consumption, body weight, fat mass, fast blood glucose level, circulating insulin and adiponectin and glucose tolerance test were analyzed. The liver and pancreatic tissues were subjected to H&E and immunohistochemistry staining and islet cells to flow cytometry for apoptotic analysis. RYGB resulted in sustained normoglycemia and improved glucose tolerance in young prediabetic BKS-db/db mice (at the age of 6 weeks with hyperglycemia and normal insulinemia) and HFD-fed NZO and B6-db/db mice. Remarkably, RYGB improved liver steatosis, preserved the pancreatic β-cells and reduced β-cell apoptosis with increases in circulating insulin and adiponectin in young prediabetic BKS-db/db mice. However, RYGB neither reversed hyperglycemia in adult diabetic BKS-db/db mice (12 weeks old) nor attenuated hyperglycemia in STZ-induced diabetic mice. These results demonstrate that gastric bypass improves hyperglycemia in genetically modified prediabetic mice; however, it should be performed prior to β-cells exhaustion.
Keyphrases
- roux en y gastric bypass
- gastric bypass
- type diabetes
- high fat diet induced
- high fat diet
- diabetic rats
- weight loss
- insulin resistance
- obese patients
- glycemic control
- cardiovascular disease
- induced apoptosis
- blood glucose
- adipose tissue
- metabolic syndrome
- bariatric surgery
- high glucose
- blood pressure
- cell cycle arrest
- cell proliferation
- gene expression
- endothelial cells
- cell death
- preterm birth
- pi k akt
- wound healing