ArticleObesity surgery2019
Gastric Bypass Surgery Improves the Skeletal Muscle Ceramide/S1P Ratio and Upregulates the AMPK/ SIRT1/ PGC-1α Pathway in Zucker Diabetic Fatty Rats.
Article in Obesity surgery, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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12 citing papers in PubMed, 18 citations in OpenAlex.
- AMPK/ SIRT1 signaling pathway activation acts on PGC-1α/ PPARγ to alleviate sepsis-acquired weakness.Cell death discovery · 2026Article
- Ameliorative Effects of Aerobic Exercise Combined WithFood science & nutrition · 2026Article
- Lipid metabolism drives podocyte injury in diabetic kidney disease.Frontiers in immunology · 2026Review
- Role of ceramides in diabetic foot ulcers (Review).International journal of molecular medicine · 2023Review
- Roux-en-Y Gastric Bypass Improves Insulin Sensitivity in Obese Rats with Type 2 Diabetes Mellitus by Regulating the Grin3a/AMPK Signal Axis in Hypothalamic Arcuate Nucleus.Diabetes, metabolic syndrome and obesity : targets and therapy · 2023Article
- Duodenal-jejunal bypass increases intraduodenal bile acids and upregulates duodenal SIRT1 expression in high-fat diet and streptozotocin-induced diabetic rats.World journal of gastroenterology · 2022Article
- Incretin-induced changes in the transcriptome of skeletal muscles of fa/fa Zucker rat (ZFR) with obesity, without diabetes.International journal of obesity (2005) · 2022Article
- Sevoflurane Improves Hemorrhagic Shock and Resuscitation-Induced Cognitive Impairments and Mitochondrial Dysfunctions through SIRT1-Mediated Autophagy.Oxidative medicine and cellular longevity · 2022Article
- Metabolic effects of duodenojejunal bypass surgery in a rat model of type 1 diabetes.Surgical endoscopy · 2021Article
- Leptin Receptors Are Not Required for Roux-en-Y Gastric Bypass Surgery to Normalize Energy and Glucose Homeostasis in Rats.Nutrients · 2021Article
- Type 2 Diabetes Modifies Skeletal Muscle Gene Expression Response to Gastric Bypass Surgery.Frontiers in endocrinology · 2021Article
- Effects of gastric bypass surgery on expression of glucose transporters and fibrotic biomarkers in kidney of diabetic fatty rats.Surgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery · 2020Article
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Authors and funding
8 authors at 3 institutions in 1 country.
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Abstract
purposeRoux-en-Y gastric bypass (RYGB) is associated with remission of type 2 diabetes. However, the cellular and molecular mechanisms remain unknown. We hypothesized that RYGB would increase peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α), sirtuin-1 (SIRT1), AMPK/pAMPK, and citrate synthase (CS) protein expression and decrease insulin resistance and these changes would be mediated by sphingolipids, including ceramides and the sphingolipid metabolite sphingosine-1 phosphate (S1P). MATERIALS AND
methodsMale ZDF rats were randomized to RYGB (n = 7) or sham surgery (n = 7) and harvested after 28 days. Total tissue ceramide, ceramide subspecies (C14:0, C16:0, C18:0, C18:1, C20:0, C24:0, and C24:1), and S1P were quantified in the white gastrocnemius muscle using LC-ESI-MS/MS after separation with HPLC. Total SIRT1, AMPK, PGC-1α, and CS protein expression were measured by Western blot.
resultsBody weight, fasting glucose, insulin, and HOMA-IR decreased significantly after RYGB compared with sham control. These changes were paralleled by lower total ceramide (483.7 ± 32.3 vs. 280.1 ± 38.8 nmol/g wwt), C18:0 ceramide subspecies (P < 0.05), higher S1P (0.83 ± 0.05 vs. 1.54 ± 0.21 nmol/g wwt, P < 0.05), and a lower ceramide/S1P ratio (P < 0.05) in the RYGB versus sham group. AMPK, pAMPK, SIRT1, PGC-1α, and CS protein expression was also higher after RYGB (P < 0.05). The ceramide/S1P ratio correlated with weight loss (r = 0.48, P = 0.08), insulin resistance (r = 0.61, P = 0.02), PGC-1α (r = - 0.51, P < 0.06), CS (r = - 0.63, P = 0.01), and SIRT1 (r = - 0.54, P < 0.04).
conclusionOur data demonstrate that sphingolipid balance, and increased AMPK, SIRT1, PGC-1α, and CS protein expression are part of the mechanism that contributes to the remission of diabetes after RYGB surgery.
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