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Benhaddou S, Ribeiro-Parenti L, Khodorova N, Willemetz A, Chapelais M, Azzout-Marniche D, Le Gall M, Gaudichon C. Effects of gastric bypass on the digestibility and postprandial metabolic fate of 15N dietary protein in rats. PLoS One 2024; 19:e0307075. [PMID: 39102389 PMCID: PMC11299818 DOI: 10.1371/journal.pone.0307075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 06/30/2024] [Indexed: 08/07/2024] Open
Abstract
Roux-en-Y Gastric Bypass may be associated with an alteration of protein bioavailability in relation to intestinal remodeling. Our study aimed to test this hypothesis by Roux-en-Y Gastric Bypass. Diet-induced obese rats underwent Roux-en-Y Gastric Bypass surgery (RYGB rats) while a Sham-operated control group was used. All rats received a 15N-labeled protein meal 1 or 3 months after surgery and were euthanized 6h later. Protein digestibility, 15N recovered in organs and urea pool, fractional protein synthesis rate, and intestinal morphometry were assessed. Protein digestibility was similar in all groups (94.2±0.3%). The small intestine was hypertrophied in RYGB rats 1 month after surgery, weighing 9.1±0.2g vs. 7.0±0.3g in Sham rats (P = 0.003). Villus height and crypt depth were increased in the alimentary limb and ileum of RYGB rats. However, Roux-en-Y Gastric Bypass had no impact on the fractional synthesis rate. In the gastrointestinal tract, 15N retention only differed in the ileal mucosa and was higher in RYGB rats at 1 month (0.48±0.2% vs. 0.3±0.09%, P = 0.03). 15N recovery from the liver, muscle, and skin was lower in RYGB rats at 1 month. 15N recovery from urinary and plasma urea was higher in RYGB rats at both times, resulting in increased total deamination (13.2±0.9% vs. 10.1±0.5%, P<0.01). This study showed that Roux-en-Y Gastric Bypass did not affect protein digestibility. Dietary nitrogen sequestration was transitorily and moderately diminished in several organs. This was associated with a sustained elevation of postprandial deamination after Roux-en-Y Gastric Bypass, whose mechanisms merit further studies.
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Affiliation(s)
- Soukaïna Benhaddou
- AgroParisTech, INRAE, UMR PNCA, Université Paris-Saclay, Palaiseau, France
| | - Lara Ribeiro-Parenti
- Inserm UMRS 1149, Centre de Recherche sur l’Inflammation, Université Paris Cité, Paris, France
- Service de Chirurgie Digestive Oesogastrique et Bariatrique, Hôpital Bichat—Claude‐Bernard, Assistance Publique‐Hôpitaux de Paris, Université Paris Cité, Paris, France
| | - Nadezda Khodorova
- AgroParisTech, INRAE, UMR PNCA, Université Paris-Saclay, Palaiseau, France
| | - Alexandra Willemetz
- Inserm UMRS 1149, Centre de Recherche sur l’Inflammation, Université Paris Cité, Paris, France
| | - Martin Chapelais
- AgroParisTech, INRAE, UMR PNCA, Université Paris-Saclay, Palaiseau, France
| | | | - Maude Le Gall
- Inserm UMRS 1149, Centre de Recherche sur l’Inflammation, Université Paris Cité, Paris, France
| | - Claire Gaudichon
- AgroParisTech, INRAE, UMR PNCA, Université Paris-Saclay, Palaiseau, France
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Alabduljabbar K, Bonanos E, Miras AD, le Roux CW. Mechanisms of Action of Bariatric Surgery on Body Weight Regulation. Gastroenterol Clin North Am 2023; 52:691-705. [PMID: 37919021 DOI: 10.1016/j.gtc.2023.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Abstract
Bariatric surgery is an effective treatment modality for obesity and obesity-associated complications. Weight loss after bariatric surgery was initially attributed to anatomic restriction or reduced energy absorption, but now it is understood that surgery treats obesity by influencing the subcortical areas of the brain to lower adipose tissue mass. There are three major phases of this process: initially the weight loss phase, followed by a phase where weight loss is maintained, and in a subset of patients a phase where weight is regained. These phases are characterized by altered appetitive behavior together with changes in energy expenditure. The mechanisms associated with the rearrangement of the gastrointestinal tract include central appetite control, release of gut peptides, change in microbiota and bile acids. However, the exact combination and timing of signals remain largely unknown.
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Affiliation(s)
- Khaled Alabduljabbar
- Diabetes Complications Research Centre, Conway Institute, University College Dublin, Dublin, Ireland; Department of Family Medicine and Polyclinics, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia.
| | | | | | - Carel W le Roux
- Diabetes Complications Research Centre, Conway Institute, University College Dublin, Dublin, Ireland.
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Alsayed Hasan M, Schwartz S, McKenna V, Ing R. An Imbalance of Pathophysiologic Factors in Late Postprandial Hypoglycemia Post Bariatric Surgery: A Narrative Review. Obes Surg 2023; 33:2927-2937. [PMID: 37530920 DOI: 10.1007/s11695-023-06758-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 07/18/2023] [Accepted: 07/25/2023] [Indexed: 08/03/2023]
Abstract
With a rise in obesity and more patients opting for bariatric surgery, it becomes crucial to understand associated complications like postprandial hypoglycemia (PPH). After bariatric surgery, significant changes are seen in insulin sensitivity, beta cell function, glucagon-like peptide 1 (GLP-1) levels, the gut microbiome, and bile acid metabolism. And in a small subset of patients, exaggerated imbalances in these functional and metabolic processes lead to insulin-glucose mismatch and hypoglycemia. The main treatment for PPH involves dietary modifications. For those that do not respond, medications or surgical interventions are considered to reverse some of the imbalances. We present a few case reports of patients that safely tolerated GLP-1 agonists. However, larger randomized control trials are needed to further characterize PPH and understand its treatment.
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Affiliation(s)
- Marah Alsayed Hasan
- Department of Internal Medicine, Main Line Health System/Lankenau Medical Center, 100 E Lancaster Ave, Wynnewood, PA, 19096, USA.
| | - Stanley Schwartz
- Affiliate, Main Line Health System, Emeritus, University of Pennsylvania, 100 E Lancaster Ave, Wynnewood, PA, 19096, USA
| | - Victoria McKenna
- Main Line Health Bariatric Surgery - Bryn Mawr, 830 Old Lancaster Road Suite 300, Bryn Mawr, PA, 19010, USA
| | - Richard Ing
- Bariatric Center of Bryn Mawr Hospital, Main Line Health System, Bryn Mawr Medical Building North, 830 Old Lancaster Road, Bryn Mawr, PA, 19010, USA
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Eagleston J, Nimeri A. Optimal Small Bowel Limb Lengths of Roux-en-Y Gastric Bypass. Curr Obes Rep 2023; 12:345-354. [PMID: 37466789 DOI: 10.1007/s13679-023-00513-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/18/2023] [Indexed: 07/20/2023]
Abstract
PURPOSE OF REVIEW Gastric bypass and biliopancreatic diversion (BPD) have come full circle, from a loop configuration to a Roux-en-Y and finally back to a loop configuration as one anastomosis gastric bypass and single-anastomosis duodenal switch. Most surgeons performing Roux-en-Y gastric bypass (RYGB) do not measure the common channel (CC) length and most surgeons performing BPD do not measure the biliopancreatic limb length (BPL). RECENT FINDINGS The small bowel length in humans is variable from as short as < 400 cm to as long as > 1000 cm. The combination of these two facts means that even if surgeons keep the limb lengths constant, surgeons will get variable limb length due to the variability of small bowel length in patients. Hence, outcomes of weight loss, resolution of medical problems, or developing nutritional deficiencies which are related to limb length are variable. In this article, we evaluate the published literature related to the effect of varying the Roux limb, BPL, CC, and total alimentary limb lengths on the outcomes of RYGB. We have focused on historical and current randomized controlled trials as well as systematic reviews and meta-analysis to outline the current literature and our interpretation of this literature.
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Affiliation(s)
- Justin Eagleston
- Bariatric Surgery, Department of Surgery, Atrium Health, Charlotte, USA
| | - Abdelrahman Nimeri
- Wake Forest School of Medicine, Bariatric Surgery, Atrium Health, Charlotte, NC, USA.
- Director, of Bariatric Surgery, Brigham and Womens Hospital, Harvard Medical School, 75 Francis, MA, 02115, Boston, USA.
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5
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Alabduljabbar K, Al-Najim W, le Roux CW. Food preferences after bariatric surgery: a review update. Intern Emerg Med 2023; 18:351-358. [PMID: 36478323 DOI: 10.1007/s11739-022-03157-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 11/20/2022] [Indexed: 12/13/2022]
Abstract
Obesity is a serious and global health problem. The multiple complications of obesity reduce quality of life and increase mortality. Bariatric surgery is one of the best treatment options for obesity management. Bariatric surgery helps people reduce their caloric intake by treating the disease of obesity effectively, in part by increasing signaling from the gut to the brain. The most frequent surgical options are Roux-en-Y gastric bypass (RYGB) and sleeve gastrectomy (SG). There is controversy regarding changes in food preferences and selection after bariatric surgery. In this review, we aim to outline the changes in food intake and selection, clarify the behavior changes in food intake, and assess the potential mechanisms responsible for these changes in patients after bariatric surgery.
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Affiliation(s)
- Khaled Alabduljabbar
- Department of Family Medicine and Polyclinics, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
- Diabetes Complications Research Centre, Conway Institute, University College Dublin, Dublin, Ireland
| | - Werd Al-Najim
- Diabetes Complications Research Centre, Conway Institute, University College Dublin, Dublin, Ireland
| | - Carel W le Roux
- Diabetes Complications Research Centre, Conway Institute, University College Dublin, Dublin, Ireland.
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Okikawa S, Kashihara H, Shimada M, Yoshikawa K, Tokunaga T, Nishi M, Takasu C, Wada Y, Yoshimoto T. Effect of duodenal-jejunal bypass on diabetes in the early postoperative period. Sci Rep 2023; 13:1856. [PMID: 36726038 PMCID: PMC9892584 DOI: 10.1038/s41598-023-28923-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 01/27/2023] [Indexed: 02/03/2023] Open
Abstract
Metabolic surgery is an effective treatment for patients with type 2 diabetes mellitus (T2DM). The aim of this study was to investigate the effect of duodenal-jejunal bypass (DJB) in a rat model of T2DM during the early postoperative period. A rat model of non-obese T2DM was allocated to two groups: a sham group and a DJB group. On postoperative day 1 (1POD), oral glucose tolerance testing (OGTT) was performed and the changes of glucose transporter expressions in the small intestine was evaluated. [18F]-fluorodeoxyglucose ([18]-FDG) uptake was measured in sham- and DJB-operated rats using positron emission tomography-computed tomography (PET-CT). DJB improved the glucose tolerance of the rats on 1POD. The expression of sodium-glucose cotransporter 1 (SGLT1) and glucose transporter 1 (GLUT1) was high, and that of GLUT2 was low in the alimentary limb (AL) of rats in the DJB group. PET-CT showed that [18F]-FDG uptake was high in the proximal jejunum of DJB-operated rats. These results may show that DJB improve glucose tolerance in very early postoperative period as the result of glucose accumulation in the AL because of changes in glucose transporter expression.
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Affiliation(s)
- Shohei Okikawa
- Department of Surgery, Tokushima University, 3-18-15 Kuramoto-Cho, Tokushima, Tokushima, 770-8503, Japan
| | - Hideya Kashihara
- Department of Surgery, Tokushima University, 3-18-15 Kuramoto-Cho, Tokushima, Tokushima, 770-8503, Japan.
| | - Mitsuo Shimada
- Department of Surgery, Tokushima University, 3-18-15 Kuramoto-Cho, Tokushima, Tokushima, 770-8503, Japan
| | - Kozo Yoshikawa
- Department of Surgery, Tokushima University, 3-18-15 Kuramoto-Cho, Tokushima, Tokushima, 770-8503, Japan
| | - Takuya Tokunaga
- Department of Surgery, Tokushima University, 3-18-15 Kuramoto-Cho, Tokushima, Tokushima, 770-8503, Japan
| | - Masaaki Nishi
- Department of Surgery, Tokushima University, 3-18-15 Kuramoto-Cho, Tokushima, Tokushima, 770-8503, Japan
| | - Chie Takasu
- Department of Surgery, Tokushima University, 3-18-15 Kuramoto-Cho, Tokushima, Tokushima, 770-8503, Japan
| | - Yuma Wada
- Department of Surgery, Tokushima University, 3-18-15 Kuramoto-Cho, Tokushima, Tokushima, 770-8503, Japan
| | - Toshiaki Yoshimoto
- Department of Surgery, Tokushima University, 3-18-15 Kuramoto-Cho, Tokushima, Tokushima, 770-8503, Japan
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Becerril S, Tuero C, Cienfuegos JA, Rodríguez A, Catalán V, Ramírez B, Valentí V, Moncada R, Unamuno X, Gómez-Ambrosi J, Frühbeck G. Improved Adipose Tissue Function after Single Anastomosis Duodeno-Ileal Bypass with Sleeve-Gastrectomy (SADI-S) in Diet-Induced Obesity. Int J Mol Sci 2022; 23:ijms231911641. [PMID: 36232953 PMCID: PMC9570280 DOI: 10.3390/ijms231911641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/27/2022] [Accepted: 09/27/2022] [Indexed: 11/09/2022] Open
Abstract
Bariatric surgery has been recognized as the safest and most effective procedure for controlling type 2 diabetes (T2D) and obesity in carefully selected patients. The aim of the present study was to compare the effects of Sleeve Gastrectomy (SG) and Single Anastomosis Duodenoileal Bypass with SG (SADI-S) on the metabolic profile of diet-induced obese rats. A total of 35 four-week-old male Wistar rats were submitted to surgical interventions (sham operation, SG and SADI-S) after 4 months of being fed a high-fat diet. Body weight, metabolic profile and the expression of molecules involved in the control of subcutaneous white (SCWAT), brown (BAT) and beige (BeAT) adipose tissue function were analyzed. SADI-S surgery was associated with significantly decreased amounts of total fat pads (p < 0.001) as well as better control of lipid and glucose metabolism compared to the SG counterparts. An improved expression of molecules involved in fat browning in SCWAT and in the control of BAT and BeAT differentiation and function was observed following SADI-S. Together, our findings provide evidence that the enhanced metabolic improvement and their continued durability after SADI-S compared to SG rely, at least in part, on the improvement of the BeAT phenotype and function.
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Affiliation(s)
- Sara Becerril
- Metabolic Research Laboratory, Clínica Universidad de Navarra, 31008 Pamplona, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), 31008 Pamplona, Spain
- Correspondence:
| | - Carlota Tuero
- Department of Surgery, Clínica Universidad de Navarra, 31008 Pamplona, Spain
| | - Javier A. Cienfuegos
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Department of Surgery, Clínica Universidad de Navarra, 31008 Pamplona, Spain
| | - Amaia Rodríguez
- Metabolic Research Laboratory, Clínica Universidad de Navarra, 31008 Pamplona, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), 31008 Pamplona, Spain
| | - Victoria Catalán
- Metabolic Research Laboratory, Clínica Universidad de Navarra, 31008 Pamplona, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), 31008 Pamplona, Spain
| | - Beatriz Ramírez
- Metabolic Research Laboratory, Clínica Universidad de Navarra, 31008 Pamplona, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), 31008 Pamplona, Spain
| | - Víctor Valentí
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Department of Surgery, Clínica Universidad de Navarra, 31008 Pamplona, Spain
| | - Rafael Moncada
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Department of Anesthesia, Clínica Universidad de Navarra, 31008 Pamplona, Spain
| | - Xabier Unamuno
- Metabolic Research Laboratory, Clínica Universidad de Navarra, 31008 Pamplona, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Medical Engineering Laboratory, University of Navarra, 31008 Pamplona, Spain
| | - Javier Gómez-Ambrosi
- Metabolic Research Laboratory, Clínica Universidad de Navarra, 31008 Pamplona, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), 31008 Pamplona, Spain
| | - Gema Frühbeck
- Metabolic Research Laboratory, Clínica Universidad de Navarra, 31008 Pamplona, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra (IdiSNA), 31008 Pamplona, Spain
- Department of Endocrinology & Nutrition, Clínica Universidad de Navarra, 31008 Pamplona, Spain
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Schneider R, Kraljević M, Peterli R, Rohm TV, Bosch AJ, Low AJ, Keller L, AlAsfoor S, Häfliger S, Yilmaz B, Peterson CJ, Lazaridis II, Vonaesch P, Delko T, Cavelti-Weder C. Roux-en-Y gastric bypass with a long compared to a short biliopancreatic limb improves weight loss and glycemic control in obese mice. Surg Obes Relat Dis 2022; 18:1286-1297. [DOI: 10.1016/j.soard.2022.06.286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 05/02/2022] [Accepted: 06/18/2022] [Indexed: 11/30/2022]
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9
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Akalestou E, Miras AD, Rutter GA, le Roux CW. Mechanisms of Weight Loss After Obesity Surgery. Endocr Rev 2022; 43:19-34. [PMID: 34363458 PMCID: PMC8755990 DOI: 10.1210/endrev/bnab022] [Citation(s) in RCA: 48] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Indexed: 02/07/2023]
Abstract
Obesity surgery remains the most effective treatment for obesity and its complications. Weight loss was initially attributed to decreased energy absorption from the gut but has since been linked to reduced appetitive behavior and potentially increased energy expenditure. Implicated mechanisms associating rearrangement of the gastrointestinal tract with these metabolic outcomes include central appetite control, release of gut peptides, change in microbiota, and bile acids. However, the exact combination and timing of signals remain largely unknown. In this review, we survey recent research investigating these mechanisms, and seek to provide insights on unanswered questions over how weight loss is achieved following bariatric surgery which may eventually lead to safer, nonsurgical weight-loss interventions or combinations of medications with surgery.
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Affiliation(s)
- Elina Akalestou
- Section of Cell Biology and Functional Genomics, Division of Diabetes, Endocrinology and Metabolism, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
| | - Alexander D Miras
- Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
| | - Guy A Rutter
- Section of Cell Biology and Functional Genomics, Division of Diabetes, Endocrinology and Metabolism, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK.,Lee Kong Chian Imperial Medical School, Nanyang Technological University, Singapore.,University of Montreal Hospital Research Centre, Montreal, QC, Canada
| | - Carel W le Roux
- Diabetes Complications Research Centre, University College Dublin, Ireland.,Diabetes Research Group, School of Biomedical Science, Ulster University, Belfast, UK
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Oh JH, Kang CW, Wang EK, Nam JH, Lee S, Park KH, Lee EJ, Cho A, Ku CR. Altered Glucose Metabolism and Glucose Transporters in Systemic Organs After Bariatric Surgery. Front Endocrinol (Lausanne) 2022; 13:937394. [PMID: 35909546 PMCID: PMC9329688 DOI: 10.3389/fendo.2022.937394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 06/20/2022] [Indexed: 11/13/2022] Open
Abstract
The Roux-en-Y gastric bypass (RYGB) is highly effective in the remission of obesity and associated diabetes. The mechanisms underlying obesity and type 2 diabetes mellitus remission after RYGB remain unclear. This study aimed to evaluate the changes in continuous dynamic FDG uptake patterns after RYGB and examine the correlation between glucose metabolism and its transporters in variable endocrine organs using 18F-fluoro-2-deoxyglucose positron emission tomography images. Increased glucose metabolism in specific organs, such as the small intestine and various fat tissues, is closely associated with improved glycemic control after RYGB. In Otsuka Long-Evans Tokushima Fatty rats fed with high-fat diets, RYGB operation increases intestine glucose transporter expression and various fat tissues' glucose transporters, which are not affected by insulin. The fasting glucose decrement was significantly associated with RYGB, sustained weight loss, post-RYGB oral glucose tolerance test (OGTT) area under the curve (AUC), glucose transporter, or glycolytic enzymes in the small bowel and various fat tissues. High intestinal glucose metabolism and white adipose tissue-dependent glucose metabolism correlated with metabolic benefit after RYGB. These findings suggest that the newly developed glucose biodistribution accompanied by increased glucose transporters is a mechanism associated with the systemic effect of RYGB.
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Affiliation(s)
- Ju Hun Oh
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University, College of Medicine, Seoul, South Korea
- Department of Internal Medicine, Endocrinology, Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Chan Woo Kang
- Department of Internal Medicine, Endocrinology, Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Eun Kyung Wang
- Department of Internal Medicine, Endocrinology, Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Jung Ho Nam
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University, College of Medicine, Seoul, South Korea
- Department of Internal Medicine, Endocrinology, Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Soohyun Lee
- Department of Internal Medicine, Endocrinology, Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Kyeong Hye Park
- Division of Endocrinology and Metabolism, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang, South Korea
| | - Eun Jig Lee
- Department of Internal Medicine, Endocrinology, Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Arthur Cho
- Department of Nuclear Medicine, Yonsei University College of Medicine, Seoul, South Korea
- *Correspondence: Cheol Ryong Ku, ; Arthur Cho,
| | - Cheol Ryong Ku
- Department of Internal Medicine, Endocrinology, Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, South Korea
- *Correspondence: Cheol Ryong Ku, ; Arthur Cho,
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Schnabl K, Li Y, U-Din M, Klingenspor M. Secretin as a Satiation Whisperer With the Potential to Turn into an Obesity-curbing Knight. Endocrinology 2021; 162:6294014. [PMID: 34089599 DOI: 10.1210/endocr/bqab113] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Indexed: 01/01/2023]
Abstract
The obesity pandemic requires effective preventative and therapeutic intervention strategies. Successful and sustained obesity treatment is currently limited to bariatric surgery. Modulating the release of gut hormones is considered promising to mimic bariatric surgery with its beneficial effects on food intake, body weight, and blood glucose levels. The gut peptide secretin was the first molecule to be termed a hormone; nevertheless, only recently has it been established as a legitimate anorexigenic peptide. In contrast to gut hormones that crosstalk with the brain either directly or by afferent neuronal projections, secretin mediates meal-associated brown fat thermogenesis to induce meal termination, thereby qualifying this physiological mechanism as an attractive, peripheral target for the treatment of obesity. In this perspective, it is of pivotal interest to deepen our as yet superficial knowledge on the physiological roles of secretin as well as meal-associated thermogenesis in energy balance and body weight regulation. Of note, the emerging differences between meal-associated thermogenesis and cold-induced thermogenesis must be taken into account. In fact, there is no correlation between these 2 entities. In addition, the investigation of potential effects of secretin in hedonic-driven food intake, bariatric surgery and chronic treatment using suitable application strategies to overcome pharmacokinetic limitations will provide further insight into its potential to influence energy balance. The aim of this article is to review the facts on secretin's metabolic effects, address prevailing gaps in our knowledge, and provide an overview on the opportunities and challenges of the therapeutic potential of secretin in body weight control.
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Affiliation(s)
- Katharina Schnabl
- Chair for Molecular Nutritional Medicine, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
- EKFZ-Else Kröner Fresenius Center for Nutritional Medicine, Technical University of Munich, Freising, Germany
- ZIEL-Institute for Food & Health, Technical University of Munich, Freising, Germany
| | - Yongguo Li
- Chair for Molecular Nutritional Medicine, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
- EKFZ-Else Kröner Fresenius Center for Nutritional Medicine, Technical University of Munich, Freising, Germany
| | - Mueez U-Din
- Turku PET Centre, Turku University Hospital, Turku, Finland
| | - Martin Klingenspor
- Chair for Molecular Nutritional Medicine, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
- EKFZ-Else Kröner Fresenius Center for Nutritional Medicine, Technical University of Munich, Freising, Germany
- ZIEL-Institute for Food & Health, Technical University of Munich, Freising, Germany
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Central Noradrenergic Neurotransmission and Weight Loss 6 Months After Gastric Bypass Surgery in Patients with Severe Obesity. Obes Surg 2021; 31:4868-4876. [PMID: 34414548 PMCID: PMC8490257 DOI: 10.1007/s11695-021-05657-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 08/03/2021] [Accepted: 08/04/2021] [Indexed: 11/18/2022]
Abstract
Purpose Roux-en-Y gastric bypass (RYGB) surgery is currently the most efficient treatment to achieve long-term weight loss in individuals with severe obesity. This is largely attributed to marked reductions in food intake mediated in part by changes in gut-brain communication. Here, we investigated for the first time whether weight loss after RYGB is associated with alterations in central noradrenaline (NA) neurotransmission. Materials and Methods We longitudinally studied 10 individuals with severe obesity (8 females; age 43.9 ± 13.1 years; body mass index (BMI) 46.5 ± 4.8 kg/m2) using (S,S)-[11C]O-methylreboxetine and positron emission tomography to estimate NA transporter (NAT) availability before and 6 months after surgery. NAT distribution volume ratios (DVR) were calculated by volume-of-interest analysis and the two-parameter multilinear reference tissue model (reference region: occipital cortex). Results The participants responded to RYGB surgery with a reduction in BMI of 12.0 ± 3.5 kg/m2 (p < 0.001) from baseline. This was paralleled by a significant reduction in DVR in the dorsolateral prefrontal cortex (pre-surgery 1.12 ± 0.04 vs. post-surgery 1.07 ± 0.04; p = 0.019) and a general tendency towards reduced DVR throughout the brain. Furthermore, we found a strong positive correlation between pre-surgery DVR in hypothalamus and the change in BMI (r = 0.78; p = 0.01). Conclusion Reductions in BMI after RYGB surgery are associated with NAT availability in brain regions responsible for decision-making and homeostasis. However, these results need further validation in larger cohorts, to assess whether brain NAT availability could prognosticate the outcome of RYGB on BMI. Graphical abstract ![]()
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Steenackers N, Vanuytsel T, Augustijns P, Tack J, Mertens A, Lannoo M, Van der Schueren B, Matthys C. Adaptations in gastrointestinal physiology after sleeve gastrectomy and Roux-en-Y gastric bypass. Lancet Gastroenterol Hepatol 2021; 6:225-237. [PMID: 33581761 DOI: 10.1016/s2468-1253(20)30302-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 07/27/2020] [Accepted: 07/29/2020] [Indexed: 01/19/2023]
Abstract
Linked to the growing obesity epidemic, demand for bariatric and metabolic surgery has increased, the most common procedures being sleeve gastrectomy and Roux-en-Y gastric bypass. Originally, bariatric procedures were described as purely restrictive, malabsorptive, or combined restrictive-malabsorptive procedures limiting food intake, nutrient absorption, or both. Nowadays, anatomical alterations are known to affect gastrointestinal physiology, which in turn affects the digestion and absorption of nutrients and drugs. Therefore, understanding gastrointestinal physiology is crucial to prevent postoperative nutritional deficiencies and to optimise postoperative drug therapy. Preclinical and clinical research indicates that sleeve gastrectomy accelerates liquid and solid gastric emptying and small intestinal transit, and increases bile acid serum levels, whereas its effects on gastrointestinal acidity, gastric and pancreatic secretions, surface area, and colonic transit remain largely unknown. Roux-en-Y gastric bypass diminishes gastric acid secretion, accelerates liquid gastric emptying, and increases bile acid serum levels, but its effects on intestinal pH, solid gastric emptying, intestinal transit time, gastric enzyme secretions, and surface area remain largely unknown. In this Review, we summarise current knowledge of the effects of these two procedures on gastrointestinal physiology and assess the knowledge gaps.
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Affiliation(s)
- Nele Steenackers
- Clinical and Experimental Endocrinology, KU Leuven, Leuven, Belgium
| | - Tim Vanuytsel
- Translational Research Center for Gastrointestinal Disorders, KU Leuven, Leuven, Belgium
| | - Patrick Augustijns
- Department of Chronic Diseases and Metabolism, and Drug Delivery and Disposition, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium
| | - Jan Tack
- Translational Research Center for Gastrointestinal Disorders, KU Leuven, Leuven, Belgium
| | - Ann Mertens
- Clinical and Experimental Endocrinology, KU Leuven, Leuven, Belgium
| | - Matthias Lannoo
- Clinical and Experimental Endocrinology, KU Leuven, Leuven, Belgium
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14
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Gautron L. The Phantom Satiation Hypothesis of Bariatric Surgery. Front Neurosci 2021; 15:626085. [PMID: 33597843 PMCID: PMC7882491 DOI: 10.3389/fnins.2021.626085] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 01/06/2021] [Indexed: 01/26/2023] Open
Abstract
The excitation of vagal mechanoreceptors located in the stomach wall directly contributes to satiation. Thus, a loss of gastric innervation would normally be expected to result in abrogated satiation, hyperphagia, and unwanted weight gain. While Roux-en-Y-gastric bypass (RYGB) inevitably results in gastric denervation, paradoxically, bypassed subjects continue to experience satiation. Inspired by the literature in neurology on phantom limbs, I propose a new hypothesis in which damage to the stomach innervation during RYGB, including its vagal supply, leads to large-scale maladaptive changes in viscerosensory nerves and connected brain circuits. As a result, satiation may continue to arise, sometimes at exaggerated levels, even in subjects with a denervated or truncated stomach. The same maladaptive changes may also contribute to dysautonomia, unexplained pain, and new emotional responses to eating. I further revisit the metabolic benefits of bariatric surgery, with an emphasis on RYGB, in the light of this phantom satiation hypothesis.
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Affiliation(s)
- Laurent Gautron
- Department of Internal Medicine, Center for Hypothalamic Research, The University of Texas Southwestern Medical Center, Dallas, TX, United States
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15
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Ceglarek VM, Bertasso IM, Pietrobon CB, Scomazzon SP, Leite NC, Bonfleur ML, Araújo ACF, Balbo SL, Grassiolli S. Maternal Roux-en-Y gastric bypass surgery reduces lipid deposition and increases UCP1 expression in the brown adipose tissue of male offspring. Sci Rep 2021; 11:1158. [PMID: 33441773 PMCID: PMC7806700 DOI: 10.1038/s41598-020-80104-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 12/03/2020] [Indexed: 01/22/2023] Open
Abstract
Maternal obesity induced by cafeteria diet (CAF) predisposes offspring to obesity and metabolic diseases, events that could be avoided by maternal bariatric surgery (BS). Herein we evaluated whether maternal BS is able to modulate brown adipose tissue (BAT) morphology and function in adult male rats born from obese female rats submitted to Roux-en-Y gastric bypass (RYGB). For this, adult male rat offspring were obtained from female rats that consumed standard diet (CTL), or CAF diet, and were submitted to simulated operation or RYGB. Analysis of offspring showed that, at 120 days of life, the maternal CAF diet induced adiposity and decreased the expression of mitochondrial Complex I (CI) and Complex III (CIII) in the BAT, resulting in higher accumulation of lipids than in BAT from offspring of CTL dams. Moreover, maternal RYGB increased UCP1 expression and prevented excessive deposition of lipids in the BAT of adult male offspring rats. However, maternal RYGB failed to reverse the effects of maternal diet on CI and CIII expression. Thus, maternal CAF promotes higher lipid deposition in the BAT of offspring, contributing to elevated adiposity. Maternal RYGB prevented obesity in offspring, probably by increasing the expression of UCP1.
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Affiliation(s)
- Vanessa Marieli Ceglarek
- Laboratory of Endocrine and Metabolic Physiology, Biosciences and Health, Postgraduate, University of West Parana, Cascavel, PR, Brazil. .,Institute of Basic Health Sciences. Biological Sciences: Physiology, postgraduate. Department of Physiology, Room 337-7, Laboratory of Neurophysiology of Cognition and Development of the Brain, Federal University of Rio Grande do Sul, 500, Sarmento Leite - Farroupilha, Porto Alegre, RS, 90050-170, Brazil.
| | - Iala Milene Bertasso
- Laboratory of Endocrine and Metabolic Physiology, Biosciences and Health, Postgraduate, University of West Parana, Cascavel, PR, Brazil
| | - Carla Bruna Pietrobon
- Laboratory of Endocrine and Metabolic Physiology, Biosciences and Health, Postgraduate, University of West Parana, Cascavel, PR, Brazil
| | - Sofia Pizzato Scomazzon
- Medical Sciences: Endocrinology Post Graduate Program, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Nayara Carvalho Leite
- Obesity Comorbidities and Research Center, University of Campinas, Campinas, SP, Brazil
| | - Maria Lúcia Bonfleur
- Laboratory of Endocrine and Metabolic Physiology, Biosciences and Health, Postgraduate, University of West Parana, Cascavel, PR, Brazil
| | - Allan Cezar Faria Araújo
- Laboratory of Endocrine and Metabolic Physiology, Biosciences and Health, Postgraduate, University of West Parana, Cascavel, PR, Brazil
| | - Sandra Lucinei Balbo
- Laboratory of Endocrine and Metabolic Physiology, Biosciences and Health, Postgraduate, University of West Parana, Cascavel, PR, Brazil
| | - Sabrina Grassiolli
- Laboratory of Endocrine and Metabolic Physiology, Biosciences and Health, Postgraduate, University of West Parana, Cascavel, PR, Brazil
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16
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Koepsell H. Glucose transporters in the small intestine in health and disease. Pflugers Arch 2020; 472:1207-1248. [PMID: 32829466 PMCID: PMC7462918 DOI: 10.1007/s00424-020-02439-5] [Citation(s) in RCA: 127] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 07/11/2020] [Accepted: 07/17/2020] [Indexed: 12/23/2022]
Abstract
Absorption of monosaccharides is mainly mediated by Na+-D-glucose cotransporter SGLT1 and the facititative transporters GLUT2 and GLUT5. SGLT1 and GLUT2 are relevant for absorption of D-glucose and D-galactose while GLUT5 is relevant for D-fructose absorption. SGLT1 and GLUT5 are constantly localized in the brush border membrane (BBM) of enterocytes, whereas GLUT2 is localized in the basolateral membrane (BLM) or the BBM plus BLM at low and high luminal D-glucose concentrations, respectively. At high luminal D-glucose, the abundance SGLT1 in the BBM is increased. Hence, D-glucose absorption at low luminal glucose is mediated via SGLT1 in the BBM and GLUT2 in the BLM whereas high-capacity D-glucose absorption at high luminal glucose is mediated by SGLT1 plus GLUT2 in the BBM and GLUT2 in the BLM. The review describes functions and regulations of SGLT1, GLUT2, and GLUT5 in the small intestine including diurnal variations and carbohydrate-dependent regulations. Also, the roles of SGLT1 and GLUT2 for secretion of enterohormones are discussed. Furthermore, diseases are described that are caused by malfunctions of small intestinal monosaccharide transporters, such as glucose-galactose malabsorption, Fanconi syndrome, and fructose intolerance. Moreover, it is reported how diabetes, small intestinal inflammation, parental nutrition, bariatric surgery, and metformin treatment affect expression of monosaccharide transporters in the small intestine. Finally, food components that decrease D-glucose absorption and drugs in development that inhibit or downregulate SGLT1 in the small intestine are compiled. Models for regulations and combined functions of glucose transporters, and for interplay between D-fructose transport and metabolism, are discussed.
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Affiliation(s)
- Hermann Koepsell
- Institute for Anatomy and Cell Biology, University of Würzburg, Koellikerstr 6, 97070, Würzburg, Germany.
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17
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Zhou LY, Deng MQ, Xiao XH. Potential contribution of the gut microbiota to hypoglycemia after gastric bypass surgery. Chin Med J (Engl) 2020; 133:1834-1843. [PMID: 32649508 PMCID: PMC7470015 DOI: 10.1097/cm9.0000000000000932] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Indexed: 12/12/2022] Open
Abstract
Obesity has become a global health problem. Lifestyle modification and medical treatment only appear to yield short-term weight loss. Roux-en-Y gastric bypass (RYGB) is the most popular bariatric procedure, and it sustains weight reduction and results in the remission of obesity-associated comorbidities for obese individuals. However, patients who undergo this surgery may develop hypoglycemia. To date, the diagnosis is challenging and the prevalence of post-RYGB hypoglycemia (PRH) is unclear. RYGB alters the anatomy of the upper gastrointestinal tract and has a combined effect of caloric intake restriction and nutrient malabsorption. Nevertheless, the physiologic changes after RYGB are complex. Although hyperinsulinemia, incretin effects, dysfunction of β-cells and α-cells, and some other factors have been widely investigated and are reported to be possible mediators of PRH, the pathogenesis is still not completely understood. In light of the important role of the gut microbiome in metabolism, we hypothesized that the gut microbiome might also be a critical link between RYGB and hypoglycemia. In this review, we mainly highlight the current possible factors predisposing individuals to PRH, particularly related to the gut microbiota, which may yield significant insights into the intestinal regulation of glucose metabolic homeostasis and provide novel clues to improve the treatment of type 2 diabetes mellitus.
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Affiliation(s)
- Li-Yuan Zhou
- Key Laboratory of Endocrinology, Translational Medicine Center, Ministry of Health, Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
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18
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Scarpellini E, Arts J, Karamanolis G, Laurenius A, Siquini W, Suzuki H, Ukleja A, Van Beek A, Vanuytsel T, Bor S, Ceppa E, Di Lorenzo C, Emous M, Hammer H, Hellström P, Laville M, Lundell L, Masclee A, Ritz P, Tack J. International consensus on the diagnosis and management of dumping syndrome. Nat Rev Endocrinol 2020; 16:448-466. [PMID: 32457534 PMCID: PMC7351708 DOI: 10.1038/s41574-020-0357-5] [Citation(s) in RCA: 105] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/31/2020] [Indexed: 12/14/2022]
Abstract
Dumping syndrome is a common but underdiagnosed complication of gastric and oesophageal surgery. We initiated a Delphi consensus process with international multidisciplinary experts. We defined the scope, proposed statements and searched electronic databases to survey the literature. Eighteen experts participated in the literature summary and voting process evaluating 62 statements. We evaluated the quality of evidence using grading of recommendations assessment, development and evaluation (GRADE) criteria. Consensus (defined as >80% agreement) was reached for 33 of 62 statements, including the definition and symptom profile of dumping syndrome and its effect on quality of life. The panel agreed on the pathophysiological relevance of rapid passage of nutrients to the small bowel, on the role of decreased gastric volume capacity and release of glucagon-like peptide 1. Symptom recognition is crucial, and the modified oral glucose tolerance test, but not gastric emptying testing, is useful for diagnosis. An increase in haematocrit >3% or in pulse rate >10 bpm 30 min after the start of the glucose intake are diagnostic of early dumping syndrome, and a nadir hypoglycaemia level <50 mg/dl is diagnostic of late dumping syndrome. Dietary adjustment is the agreed first treatment step; acarbose is effective for late dumping syndrome symptoms and somatostatin analogues are preferred for patients who do not respond to diet adjustments and acarbose.
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Affiliation(s)
- Emidio Scarpellini
- Translational Research Center for Gastrointestinal Disorders (TARGID), Department of Chronic Diseases, Metabolism and Ageing (ChroMetA), Catholic University of Leuven, Leuven, Belgium
| | - Joris Arts
- Gastroenterology Division, St Lucas Hospital, Bruges, Belgium
| | - George Karamanolis
- 2nd Department of Internal Medicine - Propaedeutic, Hepatogastroenterology Unit, Attikon University Hospital, Medical School, Athens University, Athens, Greece
| | - Anna Laurenius
- Department of Gastrosurgical Research and Education, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Walter Siquini
- Politechnic University of Marche, "Madonna del Soccorso" General Hospital, San Benedetto del Tronto, Italy
| | - Hidekazu Suzuki
- Department of Gastroenterology and Hepatology, Tokai University School of Medicine, Isehara, Japan
| | - Andrew Ukleja
- Division of Gastroenterology, Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Andre Van Beek
- Department of Endocrinology, University of Groningen, University Medical Center Groningen, Groningen, Netherlands
| | - Tim Vanuytsel
- Translational Research Center for Gastrointestinal Disorders (TARGID), Department of Chronic Diseases, Metabolism and Ageing (ChroMetA), Catholic University of Leuven, Leuven, Belgium
| | - Serhat Bor
- Division of Gastroenterology, Ege University School of Medicine, Izmir, Turkey
| | - Eugene Ceppa
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Carlo Di Lorenzo
- Division of Pediatric Gastroenterology, Nationwide Children's Hospital, Columbus, OH, USA
| | - Marloes Emous
- Department of Bariatric and Metabolic Surgery, Medical Center Leeuwarden, Leeuwarden, Netherlands
| | - Heinz Hammer
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Per Hellström
- Department of Medical Sciences, Gastroenterology/Hepatology, Uppsala University, Uppsala, Sweden
| | - Martine Laville
- Department of Endocrinology, Claude Bernard University, Lyon, France
| | - Lars Lundell
- Department of Surgery Hospital, Karolinska University Hospital, Huddinge, Stockholm, Sweden
| | - Ad Masclee
- Department of Gastroenterology-Hepatology, University Hospital Leiden, Leiden, Netherlands
| | | | - Jan Tack
- Translational Research Center for Gastrointestinal Disorders (TARGID), Department of Chronic Diseases, Metabolism and Ageing (ChroMetA), Catholic University of Leuven, Leuven, Belgium.
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19
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Hankir MK, Seyfried F. Do Bariatric Surgeries Enhance Brown/Beige Adipose Tissue Thermogenesis? Front Endocrinol (Lausanne) 2020; 11:275. [PMID: 32425889 PMCID: PMC7203442 DOI: 10.3389/fendo.2020.00275] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 04/14/2020] [Indexed: 12/13/2022] Open
Abstract
Bariatric surgeries induce marked and durable weight loss in individuals with morbid obesity through powerful effects on both food intake and energy expenditure. While alterations in gut-brain communication are increasingly implicated in the improved eating behavior following bariatric surgeries, less is known about the mechanistic basis for energy expenditure changes. Brown adipose tissue (BAT) and beige adipose tissue (BeAT) have emerged as major regulators of whole-body energy metabolism in humans as well as in rodents due to their ability to convert the chemical energy in circulating glucose and fatty acids into heat. In this Review, we critically discuss the steadily growing evidence from preclinical and clinical studies suggesting that Roux-en-Y gastric bypass (RYGB) and vertical sleeve gastrectomy (VSG), the two most commonly performed bariatric surgeries, enhance BAT/BeAT thermogenesis. We address the documented mechanisms, highlight study limitations and finish by outlining unanswered questions in the subject. Further understanding how and to what extent bariatric surgeries enhance BAT/BeAT thermogenesis may not only aid in the development of improved obesity pharmacotherapies that safely and optimally target both sides of the energy balance equation, but also in the development of novel hyperglycemia and/or hyperlipidemia pharmacotherapies.
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Affiliation(s)
- Mohammed K. Hankir
- Department of Experimental Surgery, University Hospital Wuerzburg, Wuerzburg, Germany
| | - Florian Seyfried
- Department of General, Visceral, Vascular and Pediatric Surgery, University Hospital Wuerzburg, Wuerzburg, Germany
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20
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Le Gall M, Thenet S, Aguanno D, Jarry AC, Genser L, Ribeiro-Parenti L, Joly F, Ledoux S, Bado A, Le Beyec J. Intestinal plasticity in response to nutrition and gastrointestinal surgery. Nutr Rev 2020; 77:129-143. [PMID: 30517714 DOI: 10.1093/nutrit/nuy064] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The plasticity of a material corresponds to its capacity to change its feature under the effect of an external action. Intestinal plasticity could be defined as the ability of the intestine to modify its size or thickness and intestinal cells to modulate their absorption and secretion functions in response to external or internal cues/signals. This review will focus on intestinal adaptation mechanisms in response to diet and nutritional status. These physiological mechanisms allow a fine and rapid adaptation of the gut to promote absorption of ingested food, but they can also lead to obesity in response to overnutrition. This plasticity could thus become a therapeutic target to treat not only undernutrition but also obesity. How the intestine adapts in response to 2 types of surgical remodeling of the digestive tract-extensive bowel resection leading to intestinal failure and surgical treatment of pathological obesity (ie, bariatric surgeries)-will also be reviewed.
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Affiliation(s)
- Maude Le Gall
- Centre de Recherche sur l'Inflammation, Inserm UMRS _1149, Université Paris Diderot, AP-HP, Paris, France
| | - Sophie Thenet
- Centre de Recherche des Cordeliers, Sorbonne Université, EPHE, PSL University, Sorbonne Cités, UPD Univ Paris 05, INSERM, CNRS, Paris, France
| | - Doriane Aguanno
- Centre de Recherche des Cordeliers, Sorbonne Université, EPHE, PSL University, Sorbonne Cités, UPD Univ Paris 05, INSERM, CNRS, Paris, France
| | - Anne-Charlotte Jarry
- Centre de Recherche sur l'Inflammation, Inserm UMRS _1149, Université Paris Diderot, AP-HP, Paris, France
| | - Laurent Genser
- Sorbonne Université, INSERM, Nutriomics Team, Paris, France, and the Assistance Publique-Hôpitaux de Paris, Pitié-Salpêtrière Hospital, Department of Hepato-Biliary and Pancreatic Surgery, Liver Transplantation, Paris, France
| | - Lara Ribeiro-Parenti
- Centre de Recherche sur l'Inflammation, Inserm UMRS _1149, Université Paris Diderot, AP-HP, Paris, France.,Department of General and Digestive Surgery, University Hospital Bichat-Claude-Bernard, Paris, France
| | - Francisca Joly
- Centre de Recherche sur l'Inflammation, Inserm UMRS _1149, Université Paris Diderot, AP-HP, Paris, France.,Department of Gastroenterology, Inflammatory Bowel Diseases, Nutritional Support and Intestinal Transplantation, Paris, France
| | - Séverine Ledoux
- Centre de Recherche sur l'Inflammation, Inserm UMRS _1149, Université Paris Diderot, AP-HP, Paris, France.,Service des Explorations Fonctionnelles, Centre de référence de prise en charge de l'obésité, GHUPNVS, Hôpital Louis Mourier, Colombes, France
| | - André Bado
- Centre de Recherche sur l'Inflammation, Inserm UMRS _1149, Université Paris Diderot, AP-HP, Paris, France
| | - Johanne Le Beyec
- Centre de Recherche sur l'Inflammation, Inserm UMRS _1149, Université Paris Diderot, AP-HP, Paris, France.,Sorbonne Université, AP-HP, Hôpital Pitié-Salpêtrière-Charles Foix, Biochimie Endocrinienne et Oncologique, Paris, France
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21
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Brehm B, Summer S, Jenkins T, D'Alessio D, Inge T. Thermic effect of food and resting energy expenditure after sleeve gastrectomy for weight loss in adolescent females. Surg Obes Relat Dis 2020; 16:599-606. [PMID: 32146085 DOI: 10.1016/j.soard.2020.01.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 01/20/2020] [Accepted: 01/25/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND Few studies have addressed the effect of bariatric surgery on factors related to energy balance, including resting energy expenditure (REE) and thermic effect of food (TEF). To our knowledge, very few studies have examined changes in REE and none have investigated modifications in TEF after sleeve gastrectomy (SG) performed in adolescents. OBJECTIVE To assess energy expenditure in females who underwent SG as adolescents and matched-control participants as preliminary data about the potential of SG to confer differences in postprandial energy expenditure. SETTING Children's Hospital Medical Center, Cincinnati, Ohio, United States. METHODS In this observational study, REE and respiratory quotient (RQ) were measured via indirect calorimetry, followed by a standardized meal and assessment of TEF and postprandial RQ. Plasma drawn before and every 15 minutes after the meal was assayed for insulin, glucose, and C-peptide. Usual dietary intake was estimated using 24-hour recall interviews. RESULTS Fasting REE and RQ were similar between surgical and control groups. Postmeal TEF also did not differ between groups. The surgical group had higher RQ early in the postprandial period, whereas the control group RQ was higher after 125 minutes post meal. Compared with the control group, the surgical group had lower postprandial glucose, higher insulin and C-peptide, and consumed less daily energy during usual intake. CONCLUSIONS Postprandial RQ was consistent with the rapid gastric emptying typical of SG, yet we observed no group differences in REE or TEF. These findings may have been due to limited statistical power. More comprehensive studies of EE after SG are warranted.
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Affiliation(s)
- Bonnie Brehm
- College of Nursing, University of Cincinnati, Cincinnati, Ohio.
| | - Suzanne Summer
- Schubert Research Clinic, Cincinnati Children's Hospital Medical Center Cincinnati, Cincinnati, Ohio
| | - Todd Jenkins
- Division of Pediatric General and Thoracic Surgery, Cincinnati Children's Hospital Medical Center Cincinnati, Cincinnati, Ohio
| | - David D'Alessio
- Division of Endocrinology, Department of Medicine, Duke University, Durham, North Carolina
| | - Thomas Inge
- Department of Surgery, University of Colorado Denver School of Medicine and Children's Hospital of Colorado, Aurora, Colorado
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22
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Contreras RE, Schriever SC, Pfluger PT. Physiological and Epigenetic Features of Yoyo Dieting and Weight Control. Front Genet 2019; 10:1015. [PMID: 31921275 PMCID: PMC6917653 DOI: 10.3389/fgene.2019.01015] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 09/24/2019] [Indexed: 12/16/2022] Open
Abstract
Obesity and being overweight have become a worldwide epidemic affecting more than 1.9 billion adults and 340 million children. Efforts to curb this global health burden by developing effective long-term non-surgical weight loss interventions continue to fail due to weight regain after weight loss. Weight cycling, often referred to as Yoyo dieting, is driven by physiological counter-regulatory mechanisms that aim at preserving energy, i.e. decreased energy expenditure, increased energy intake, and impaired brain-periphery communication. Models based on genetically determined set points explained some of the weight control mechanisms, but exact molecular underpinnings remained elusive. Today, gene–environment interactions begin to emerge as likely drivers for the obesogenic memory effect associated with weight cycling. Here, epigenetic mechanisms, including histone modifications and DNA methylation, appear as likely factors that underpin long-lasting deleterious adaptations or an imprinted obesogenic memory to prevent weight loss maintenance. The first part summarizes our current knowledge on the physiology of weight cycling by discussing human and murine studies on the Yoyo-dieting phenomenon and physiological adaptations associated with weight loss and weight re-gain. The second part provides an overview on known associations between obesity and epigenetic modifications. We further interrogate the roles of epigenetic mechanisms in the CNS control of cognitive functions as well as reward and addictive behaviors, and subsequently discuss whether such mechanisms play a role in weight control. The final two parts describe major opportunities and challenges associated with studying epigenetic mechanisms in the CNS with its highly heterogenous cell populations, and provide a summary of recent technological advances that will help to delineate whether an obese memory is based upon epigenetic mechanisms.
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Affiliation(s)
- Raian E Contreras
- Research Unit Neurobiology of Diabetes, Helmholtz Zentrum München, Neuherberg, Germany.,Institute for Diabetes and Obesity, Helmholtz Zentrum München, Neuherberg, Germany.,German Centre for Diabetes Research (DZD), Neuherberg, Germany.,Neurobiology of Diabetes, TUM School of Medicine, Technische Universität München, Munich, Germany
| | - Sonja C Schriever
- Research Unit Neurobiology of Diabetes, Helmholtz Zentrum München, Neuherberg, Germany.,Institute for Diabetes and Obesity, Helmholtz Zentrum München, Neuherberg, Germany.,German Centre for Diabetes Research (DZD), Neuherberg, Germany
| | - Paul T Pfluger
- Research Unit Neurobiology of Diabetes, Helmholtz Zentrum München, Neuherberg, Germany.,Institute for Diabetes and Obesity, Helmholtz Zentrum München, Neuherberg, Germany.,German Centre for Diabetes Research (DZD), Neuherberg, Germany.,Neurobiology of Diabetes, TUM School of Medicine, Technische Universität München, Munich, Germany
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Tessier R, Ribeiro-Parenti L, Bruneau O, Khodorova N, Cavin JB, Bado A, Azzout-Marniche D, Calvez J, Le Gall M, Gaudichon C. Effect of different bariatric surgeries on dietary protein bioavailability in rats. Am J Physiol Gastrointest Liver Physiol 2019; 317:G592-G601. [PMID: 31460792 DOI: 10.1152/ajpgi.00142.2019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Bariatric surgery may induce protein malabsorption, although data are scarce. This study aims at evaluating dietary protein bioavailability after different bariatric surgeries in rats. Diet-induced obese Wistar rats were operated for vertical sleeve gastrectomy (VSG) or Roux-en-Y gastric bypass (RYGB). The control group was composed of pair-fed, sham-operated rats (Sham). Two weeks after surgery, rats were fed a 15N protein meal. Protein bioavailability was assessed by determination of 15N recovery in the gastrointestinal tract and organs 6 h after the meal. Fractional protein synthesis rate (FSR) was assessed using a flooding dose of 13C valine. Weight loss was the highest in RYGB rats and the lowest in Sham rats. Surprisingly, RYGB (95.6 ± 0.7%) improved protein digestibility (P = 0.045) compared with Sham (93.5 ± 0.5%) and VSG (93.8 ± 0.6%). In contrast, 15N retained in the liver (P = 0.001) and plasma protein (P = 0.037) was lower than in Sham, with a similar trend in muscle (P = 0.052). FSR was little altered by bariatric surgery, except for a decrease in the kidney of RYGB (P = 0.02). The 15N distribution along the small intestinal tissue suggests that dietary nitrogen was considerably retained in the remodeled mucosa of RYGB compared with Sham. This study revealed that in contrast to VSG, RYGB slightly improved protein digestibility but altered peripheral protein bioavailability. This effect may be ascribed to a higher uptake of dietary amino acids by the remodeled intestine.NEW & NOTEWORTHY Using a sensitive 15N meal test, we found that gastric bypass slightly improved protein digestibility compared with sleeve gastrectomy or control but, in contrast, lowered protein retention in the liver and muscles. This paradox can be due to a higher uptake of dietary nitrogen by the intestinal mucosa that was hypertrophied. This study provides new insight on the digestive and metabolic fate of dietary protein in different models of bariatric surgery in rats.
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Affiliation(s)
- Romain Tessier
- UMR Physiology of Nutrition and Ingestive Behavior (PNCA), AgroParisTech, INRA, Université Paris-Saclay, Paris, France.,INSERM UMRS 1149, UFR de Médecine Paris Diderot, Université de Paris, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Lara Ribeiro-Parenti
- INSERM UMRS 1149, UFR de Médecine Paris Diderot, Université de Paris, Assistance Publique-Hôpitaux de Paris, Paris, France.,Department of General and Digestive Surgery, Bichat Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Ouafa Bruneau
- UMR Physiology of Nutrition and Ingestive Behavior (PNCA), AgroParisTech, INRA, Université Paris-Saclay, Paris, France.,INSERM UMRS 1149, UFR de Médecine Paris Diderot, Université de Paris, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Nadezda Khodorova
- UMR Physiology of Nutrition and Ingestive Behavior (PNCA), AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - Jean-Baptiste Cavin
- INSERM UMRS 1149, UFR de Médecine Paris Diderot, Université de Paris, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - André Bado
- INSERM UMRS 1149, UFR de Médecine Paris Diderot, Université de Paris, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Dalila Azzout-Marniche
- UMR Physiology of Nutrition and Ingestive Behavior (PNCA), AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - Juliane Calvez
- UMR Physiology of Nutrition and Ingestive Behavior (PNCA), AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - Maude Le Gall
- INSERM UMRS 1149, UFR de Médecine Paris Diderot, Université de Paris, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Claire Gaudichon
- UMR Physiology of Nutrition and Ingestive Behavior (PNCA), AgroParisTech, INRA, Université Paris-Saclay, Paris, France
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Du J, Hu C, Bai J, Peng M, Wang Q, Zhao N, Wang Y, Wang G, Tao K, Wang G, Xia Z. Intestinal Glucose Absorption Was Reduced by Vertical Sleeve Gastrectomy via Decreased Gastric Leptin Secretion. Obes Surg 2019; 28:3851-3861. [PMID: 29915972 DOI: 10.1007/s11695-018-3351-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND The unique effects of gastric resection after vertical sleeve gastrectomy (VSG) on type 2 diabetes mellitus remain unclear. This work aimed to investigate the effects of VSG on gastric leptin expression and intestinal glucose absorption in high-fat diet-induced obesity. METHODS Male C57BL/6J mice were fed a high-fat diet (HFD) to induce obesity. HFD mice were randomized into VSG and sham-operation groups, and the relevant parameters were measured at 8 weeks postoperation. RESULTS Higher gastric leptin expression and increased intestinal glucose transport were observed in the HFD mice. Furthermore, VSG reduced gastric leptin expression and the intestinal absorption of alimentary glucose. Both exogenous leptin replenishment during the oral glucose tolerance test (OGTT) and the addition of leptin into the everted isolated jejunum loops in vitro restored the glucose transport capacity in VSG-operated mice, and this effect was abolished when the glucose transporter GLUT2 was blocked with phloretin. Moreover, phloretin almost completely suppressed glucose transport in the HFD mice. Intestinal immunohistochemistry in the obese mice showed increased GLUT2 and diminished sodium glucose co-transporter 1 (SGLT-1) in the apical membrane of enterocytes. Decreased GLUT2 and enhanced SGLT1 were observed following VSG. VSG also reduced the phosphorylation status of protein kinase C isoenzyme β II (PKCβ II) in the jejunum, which was stimulated by the combination of leptin and glucose. CONCLUSION Our data demonstrated that the decreased secretion of gastric leptin in VSG results in a decrease in intestinal glucose absorption via modulation of GLUT2 translocation.
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Affiliation(s)
- Jinpeng Du
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Chaojie Hu
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Jie Bai
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Miaomiao Peng
- Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Qingbo Wang
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Ning Zhao
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Yu Wang
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Guobin Wang
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Kaixiong Tao
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Geng Wang
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China.
| | - Zefeng Xia
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China.
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Shah H, Shin AC. Meal patterns after bariatric surgery in mice and rats. Appetite 2019; 146:104340. [PMID: 31265857 DOI: 10.1016/j.appet.2019.104340] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 06/19/2019] [Accepted: 06/28/2019] [Indexed: 12/12/2022]
Abstract
With behavioral and pharmacological interventions continuously failing to tackle the obesity epidemic, bariatric surgery has been hailed as the most effective treatment strategy. Current literature suggests that bariatric surgery successfully decreases body weight and excess fat mass through targeting both variables of the energy homeostasis - energy intake and energy expenditure. Here we review current knowledge on changes in caloric consumption, an important arm in the energy balance equation, in rodent models of bariatric surgery. In particular, circadian feeding dynamics, post-surgical caloric intake at both "rapid weight loss" phase and "weight maintenance" phase, as well as meal pattern analysis will be the subject of this review. Considering that different types of bariatric surgery may trigger differential energy intake dynamics resulting in variable weight loss outcomes, the effects of most popular surgeries - vertical sleeve gastrectomy (VSG), Roux-en-Y gastric bypass (RYGB), and gastric banding (GB) - are elaborated. Potential candidate mechanisms underlying alterations in food intake and meal patterns following different bariatric procedures are briefly discussed at the end.
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Affiliation(s)
- Harsh Shah
- Department of Nutritional Sciences, College of Human Sciences, Texas Tech University, Lubbock, TX, 79409, USA
| | - Andrew C Shin
- Department of Nutritional Sciences, College of Human Sciences, Texas Tech University, Lubbock, TX, 79409, USA.
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26
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The Role of the Small Bowel in Unintentional Weight Loss after Treatment of Upper Gastrointestinal Cancers. J Clin Med 2019; 8:jcm8070942. [PMID: 31261800 PMCID: PMC6678792 DOI: 10.3390/jcm8070942] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Revised: 06/25/2019] [Accepted: 06/28/2019] [Indexed: 02/07/2023] Open
Abstract
Upper gastrointestinal (GI) cancers are responsible for significant mortality and morbidity worldwide. To date, most of the studies focused on the treatments’ efficacy and post-treatment survival rate. As treatments improve, more patients survive long term, and thus the accompanying complications including unintentional weight loss are becoming more important. Unintentional weight loss is defined as >5% of body weight loss within 6–12 months. Malignancies, particularly GI cancers, are diagnosed in approximately 25% of patients who present with unintentional weight loss. Whereas some recent studies discuss pathophysiological mechanisms and new promising therapies of cancer cachexia, there is a lack of studies regarding the underlying mechanism of unintentional weight loss in patients who are tumor free and where cancer cachexia has been excluded. The small bowel is a central hub in metabolic regulation, energy homeostasis, and body weight control throughout the microbiota-gut-brain axis. In this narrative review article, the authors discussed the impacts of upper GI cancers’ treatment modalities on the small bowel which may lead to unintentional weight loss and some new promising therapeutic agents to treat unintentional weight loss in long term survivors after upper GI operations with curative intent.
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Mumphrey MB, Hao Z, Leigh Townsend R, Qualls-Creekmore E, Yu S, Lutz TA, Münzberg H, Morrison CD, Berthoud HR. Gastric bypass surgery in lean adolescent mice prevents diet-induced obesity later in life. Sci Rep 2019; 9:7881. [PMID: 31133715 PMCID: PMC6536499 DOI: 10.1038/s41598-019-44344-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 05/15/2019] [Indexed: 01/09/2023] Open
Abstract
Gastric bypass surgery is the most effective treatment and is often the only option for subjects with severe obesity. However, investigation of critical molecular mechanisms involved has been hindered by confounding of specific effects of surgery and side effects associated with acute surgical trauma. Here, we dissociate the two components by carrying out surgery in the lean state and testing its effectiveness to prevent diet-induced obesity later in life. Body weight and composition of female mice with RYGB performed at 6 weeks of age were not significantly different from sham-operated and age-matched non-surgical mice at the time of high-fat diet exposure 12 weeks after surgery. These female mice were completely protected from high-fat diet-induced obesity and accompanying metabolic impairments for up to 50 weeks. Similar effects were seen in male mice subjected to RYGB at 5-6 weeks, although growth was slightly inhibited and protection from diet-induced obesity was less complete. The findings confirm that RYGB does not indiscriminately lower body weight but specifically prevents excessive diet-induced obesity and ensuing metabolic impairments. This prevention of obesity model should be crucial for identifying the molecular mechanisms underlying gastric bypass surgery.
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Affiliation(s)
- Michael B Mumphrey
- Neurobiology of Nutrition & Metabolism Department, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, USA
| | - Zheng Hao
- Neurobiology of Nutrition & Metabolism Department, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, USA
| | - R Leigh Townsend
- Neurobiology of Nutrition & Metabolism Department, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, USA
| | - Emily Qualls-Creekmore
- Neurobiology of Nutrition & Metabolism Department, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, USA
| | - Sangho Yu
- Neurobiology of Nutrition & Metabolism Department, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, USA
| | - Thomas A Lutz
- Institute of Veterinary Physiology, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland
| | - Heike Münzberg
- Neurobiology of Nutrition & Metabolism Department, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, USA
| | - Christopher D Morrison
- Neurobiology of Nutrition & Metabolism Department, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, USA
| | - Hans-Rudolf Berthoud
- Neurobiology of Nutrition & Metabolism Department, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, USA.
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Changes in Energy Expenditure of Patients with Obesity Following Bariatric Surgery: a Systematic Review of Prospective Studies and Meta-analysis. Obes Surg 2019; 29:2318-2337. [PMID: 31016456 DOI: 10.1007/s11695-019-03851-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We herein summarize the available literature on the effects of bariatric surgery (BS) on energy expenditure in individuals with obesity. We conducted a systematic literature review, and 35 prospective studies met our inclusion criteria. The findings indicate that BS contributes to increased diet-induced thermogenesis (DIT) and decreased total energy expenditure (TEE) and resting energy expenditure (REE) in patients with obesity. The meta-analysis demonstrated a significant decrease in TEE and REE within 6 months following BS. With the sustained decrease in REE, there was no further decrease in TEE between the 6- and 12-month follow-up. Increased DIT might explain the variance between the patterns of REE and TEE change. The postoperative decrease in REE/FFM and increase in REE/BW were observed. The changes in substrate utilization might be consistent with the change in the respiration quotient postoperatively.
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Al-Najim W, Docherty NG, le Roux CW. Food Intake and Eating Behavior After Bariatric Surgery. Physiol Rev 2018; 98:1113-1141. [PMID: 29717927 DOI: 10.1152/physrev.00021.2017] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Obesity is an escalating global chronic disease. Bariatric surgery is a very efficacious treatment for obesity and its comorbidities. Alterations to gastrointestinal anatomy during bariatric surgery result in neurological and physiological changes affecting hypothalamic signaling, gut hormones, bile acids, and gut microbiota, which coalesce to exert a profound influence on eating behavior. A thorough understanding of the mechanisms underlying eating behavior is essential in the management of patients after bariatric surgery. Studies investigating candidate mechanisms have expanded dramatically in the last decade. Herein we review the proposed mechanisms governing changes in eating behavior, food intake, and body weight after bariatric surgery. Additive or synergistic effects of both conditioned and unconditioned factors likely account for the complete picture of changes in eating behavior. Considered application of strategies designed to support the underlying principles governing changes in eating behavior holds promise as a means of optimizing responses to surgery and long-term outcomes.
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Affiliation(s)
- Werd Al-Najim
- Diabetes Complications Research Centre, Conway Institute, School of Medicine and Medical Sciences, University College Dublin , Dublin , Ireland ; Department of Gastrosurgical Research and Education, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg , Gothenburg , Sweden ; and Investigative Science, Imperial College London , London , United Kingdom
| | - Neil G Docherty
- Diabetes Complications Research Centre, Conway Institute, School of Medicine and Medical Sciences, University College Dublin , Dublin , Ireland ; Department of Gastrosurgical Research and Education, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg , Gothenburg , Sweden ; and Investigative Science, Imperial College London , London , United Kingdom
| | - Carel W le Roux
- Diabetes Complications Research Centre, Conway Institute, School of Medicine and Medical Sciences, University College Dublin , Dublin , Ireland ; Department of Gastrosurgical Research and Education, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg , Gothenburg , Sweden ; and Investigative Science, Imperial College London , London , United Kingdom
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30
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Lutz TA. Considering our methods: Methodological issues with rodent models of appetite and obesity research. Physiol Behav 2018; 192:182-187. [DOI: 10.1016/j.physbeh.2018.02.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 02/10/2018] [Accepted: 02/13/2018] [Indexed: 12/13/2022]
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Chen CH, Chen CJ, Elzoghby AO, Yeh TS, Fang JY. Self-assembly and directed assembly of lipid nanocarriers for prevention of liver fibrosis in obese rats: a comparison with the therapy of bariatric surgery. Nanomedicine (Lond) 2018; 13:1551-1566. [DOI: 10.2217/nnm-2018-0001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Aim: Whether the obesity prevention by chemicals or surgeries in already obese patients is the better choice remains controversial. We aimed to compare the effect of orally silibinin-loaded nanocarriers and Roux-en-Y gastric bypass surgery on hepatic fibrosis in high-fat feeding-induced obese rats. Methodology: The developed nanocarriers included self-emulsifying drug delivery system (SNEDDS) and nanostructured lipid carriers (NLC). Results: A significant decrease in collagen production and lipid droplet formation was observed upon nanosystem and bariatric surgery than the rats treated with silibinin control suspension. Stage 3 fibrosis was present in 33% of the obese rats. This percentage could be minimized to 0% by SNEDDS and NLC. Following oral administration, SNEDDS and NLC resulted in 3.5- and 2.9-fold increase, respectively, in bioavailability compared with the reference suspension. Conclusion: Nanomedicine prevention provided a comparable efficiency to ameliorate liver steatosis as Roux-en-Y gastric bypass due to the improvement of silibinin dissolution and gastrointestinal permeation.
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Affiliation(s)
- Chun-Han Chen
- Division of General Surgery, Department of Surgery, Chang Gung Memorial Hospital, Chiayi, Taiwan
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Kweishan, Taoyuan, Taiwan
| | - Chih-Jung Chen
- Department of Pathology, Changhua Christian Hospital, Changhua, Taiwan
- School of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Department of Medical Technology, Jen-Teh Junior College of Medicine, Nursing & Management, Miaoli, Taiwan
| | - Ahmed O Elzoghby
- Cancer Nanotechnology Research Laboratory (CNRL), Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
- Department of Industrial Pharmacy, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
| | - Ta-Sen Yeh
- Department of Surgery, Chang Gung Memorial Hospital, Kwei shan, Taoyuan, Taiwan
- School of Medicine, College of Medicine, Chang Gung University, Kwei shan, Taoyuan, Taiwan
| | - Jia-You Fang
- Pharmaceutics Laboratory, Graduate Institute of Natural Products, Chang Gung University, Kwei shan, Taoyuan, Taiwan
- Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University, Kwei shan, Taoyuan, Taiwan
- Research Center for Food & Cosmetic Safety & Research Center for Chinese Herbal Medicine, Chang Gung University of Science & Technology, Taoyuan, Taiwan
- Department of Anesthesiology, Chang Gung Memorial Hospital, Kwei shan, Taoyuan, Taiwan
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de Cleva R, Mota FC, Gadducci AV, Cardia L, D’Andréa Greve JM, Santo MA. Resting metabolic rate and weight loss after bariatric surgery. Surg Obes Relat Dis 2018; 14:803-807. [DOI: 10.1016/j.soard.2018.02.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 02/05/2018] [Accepted: 02/26/2018] [Indexed: 01/28/2023]
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Abstract
BACKGROUND Bariatric surgery is associated with hyperoxaluria hence predisposing to nephrolithiasis. The present study aimed to investigate the underlying mechanisms contributing to increased urinary oxalate in a mini-gastric bypass (MGB) surgery model in rats under different dietary conditions. The expression of intestinal oxalate transporters was also evaluated. METHODS Male rats underwent MGB (n = 21) or Sham procedure (n = 21) and after recovery were fed a standard or high-fat diet with or without oxalate for 8 weeks. Stool and urine were collected before surgery (baseline) and at the end of protocol (final), when intestinal fragments were harvested for expression of Slc26a3 and Slc26a6 oxalate transporters. RESULTS MGB groups fed with fat, irrespective of oxalate supplementation, presented steatorrhea. In MGB animals fed with fat and oxalate (Fat + Ox), final values of urinary oxalate and calcium oxalate supersaturation risk were markedly and significantly increased versus baseline or Sham animals under the same diet, as well as MGB groups under other diets. Slc26a3 was decreased in biliopancreatic limbs of MGB rats, probably reflecting a physiological adaptation to the restriction of food passage. Slc26a6 was not altered in any harvested intestinal fragment. CONCLUSIONS A high-fat and oxalate diet induced hyperoxaluria and elevation in calcium oxalate supersaturation risk in a MGB rat model. The presence of fat malabsorption and increased dietary oxalate absorption, but not modifications of Slc26a3 and Slc26a6 oxalate transporters, accounted for these findings, suggesting that bariatric patients may benefit from a low-fat and low-oxalate diet.
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Werling M, Fändriks L, Olbers T, Mala T, Kristinsson J, Stenlöf K, Wallenius V, Docherty NG, le Roux CW. Biliopancreatic Diversion is associated with greater increases in energy expenditure than Roux-en-Y Gastric Bypass. PLoS One 2018; 13:e0194538. [PMID: 29617391 PMCID: PMC5884508 DOI: 10.1371/journal.pone.0194538] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 03/05/2018] [Indexed: 01/14/2023] Open
Abstract
Objective The greater weight loss achieved following Biliopancreatic Diversion with Duodenal Switch (BPDS) versus Roux-en-Y Gastric Bypass (RYGB) has been attributed to the malabsorptive effects of BPDS. Increased weight loss after BPDS could also be underpinned by larger increases in energy expenditure. Hypothetically, the more radical reconfiguration of the small intestine in BPDS could result in an accentuated increase in meal associated thermogenesis (MAT). Design Female subjects (baseline mean age 40 years, mean BMI-55kg/m2) were assessed four years after randomization to BPDS (n = 6) or RYGB (n = 6). Energy expenditure (EE) and respiratory quotient (RQ) were measured by indirect calorimetry over 24 hours. A detailed protocol allowed for discrimination of basal metabolic rate (BMR), fasting EE and MAT as components of total energy expenditure (TEE) normalised for total and lean tissue by dual-energy x-ray absorptiometry. Results Median weight loss at follow-up was 1.5-fold higher following BPDS relative to RYGB, resulting in respective median BMIs of 29.5 kg/m2 (21.7 to 36.7) after BPDS and 37.8 kg/m2 (34.1 to 45.7) after RYGB (p = 0.015). The BPDS group had a lower fat:lean ratio compared to the RYGB group (p = 0.009). Overall 24-hour TEE adjusted for total tissue was higher in the BPDS group, as were BMR, fasting EE and MAT (all p<0.05). Differences between RYGB and BPDS in BMR and TEE were nullified when normalised for lean mass. Postprandial RQ increased significantly but to a similar extent in both groups. Conclusion Enhanced and prolonged MAT and lower fat:lean mass ratios after BPDS may explain relative increases in total energy expenditure as compared to RYGB.
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Affiliation(s)
- Malin Werling
- Department of Gastrosurgical Research and Education, Sahlgrenska academy, University of Gothenburg, Department of Surgery, Sahlgrenska University Hospital/Sahlgrenska, Gothenburg, Sweden
| | - Lars Fändriks
- Department of Gastrosurgical Research and Education, Sahlgrenska academy, University of Gothenburg, Department of Surgery, Sahlgrenska University Hospital/Sahlgrenska, Gothenburg, Sweden
| | - Torsten Olbers
- Department of Gastrosurgical Research and Education, Sahlgrenska academy, University of Gothenburg, Department of Surgery, Sahlgrenska University Hospital/Sahlgrenska, Gothenburg, Sweden
| | - Tom Mala
- Department of Morbid Obesity and Bariatric Surgery and Department of Gastrointestinal Surgery, Oslo University Hospital, Oslo, Norway
| | - Jon Kristinsson
- Department of Morbid Obesity and Bariatric Surgery and Department of Gastrointestinal Surgery, Oslo University Hospital, Oslo, Norway
| | - Kaj Stenlöf
- Gothia Forum, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Ville Wallenius
- Department of Gastrosurgical Research and Education, Sahlgrenska academy, University of Gothenburg, Department of Surgery, Sahlgrenska University Hospital/Sahlgrenska, Gothenburg, Sweden
| | - Neil G. Docherty
- Department of Gastrosurgical Research and Education, Sahlgrenska academy, University of Gothenburg, Department of Surgery, Sahlgrenska University Hospital/Sahlgrenska, Gothenburg, Sweden
- Diabetes Complications Research Centre, Conway Institute, University College Dublin, Dublin, Ireland
- * E-mail:
| | - Carel W. le Roux
- Department of Gastrosurgical Research and Education, Sahlgrenska academy, University of Gothenburg, Department of Surgery, Sahlgrenska University Hospital/Sahlgrenska, Gothenburg, Sweden
- Diabetes Complications Research Centre, Conway Institute, University College Dublin, Dublin, Ireland
- Investigative Science, Imperial College London, London, United Kingdom
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He R, Yin Y, Li Y, Li Z, Zhao J, Zhang W. Esophagus-duodenum Gastric Bypass Surgery Improves Glucose and Lipid Metabolism in Mice. EBioMedicine 2018; 28:241-250. [PMID: 29398599 PMCID: PMC5898028 DOI: 10.1016/j.ebiom.2018.01.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 01/23/2018] [Accepted: 01/23/2018] [Indexed: 12/12/2022] Open
Abstract
Background Despite of its significant therapeutic effects on obesity and metabolic diseases, Roux-en-Y gastric bypass (RYGB) has limited clinical application because of considerable impacts on the gastrointestinal structure and postoperative complications. This study aims to develop a simplified surgical approach with less damage and complication but efficient metabolic benefit. Methods The effects of Esophagus-Duodenum gastric bypass (EDGB) on body weight, food intake, glucose and lipid metabolism were compared to RYGB in mice. Findings EDGB is simple, has higher survival rate and less complication. Relative to RYGB, EDGB demonstrated modest body weight control, identical improvement of glucose and lipid metabolism in obese mice. Blood glucose increased significantly 15 and 30 min after oral glucose administration, then markedly decreased in both EDGB and RYGB groups relative to the sham surgery, indicating a quicker absorption of oral glucose and improvement in glucose uptake by insulin targeted tissues. Insulin sensitivity was identically improved. EDGB significantly decreased plasma and hepatic triglyceride levels, while increased browning in visceral and subcutaneous white adipose tissue to the extent identical to RYGB. Levels of ghrelin and nesfatin-1 increased significantly after EDGB and RYGB. Interpretation EDGB is a valuable model to study the metabolic benefit of bariatric surgery in mice. Esophagus-Duodenum gastric bypass surgery is easier and safer to perform in mice. Esophagus-Duodenum gastric bypass can produce a metabolic benefit as efficient as Roux-en-Y gastric bypass. EDGB may serve as an alternative model to study the weight-loss-independent mechanisms for glycemic control.
A valuable bariatric surgery designated as esophagus-duodenum gastric bypass surgery is easier and safer to perform. Post-operative complications are rare and survival rate is higher. The benefits to reduce bodyweight and improve blood glucose are identical to the commonly used bariatric surgery named Roux-en-Y gastric bypass surgery. In addition, esophagus-duodenum gastric bypass surgery improves lipid profile in the extent identical to Roux-en-Y gastric bypass surgery. Our study indicates that esophagus-duodenum gastric bypass surgery may provide an alternative approach for the intervention of obesity, and its associated metabolic dysfunctions such as diabetes and fatty liver.
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Affiliation(s)
- Rui He
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China; Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, Key Laboratory of Reproduction and Genetic of Ningxia Hui Autonomous Region, School of Basic Medicine, Ningxia Medical University, Shengli Street No.1160, Yinchuan 750004, China
| | - Yue Yin
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China
| | - Yin Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China
| | - Ziru Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China
| | - Jing Zhao
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China
| | - Weizhen Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China; Department of Surgery, University of Michigan Medical Center, Ann Arbor, MI 48109-0346, USA.
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Wilms B, Ernst B, Thurnheer M, Schmid SM, Spengler CM, Schultes B. Resting energy expenditure after Roux-en Y gastric bypass surgery. Surg Obes Relat Dis 2018; 14:191-199. [DOI: 10.1016/j.soard.2017.10.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 10/07/2017] [Accepted: 10/24/2017] [Indexed: 02/07/2023]
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Castagneto Gissey L, Casella Mariolo J, Mingrone G. Intestinal peptide changes after bariatric and minimally invasive surgery: Relation to diabetes remission. Peptides 2018; 100:114-122. [PMID: 29412812 DOI: 10.1016/j.peptides.2017.12.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 12/09/2017] [Accepted: 12/11/2017] [Indexed: 02/06/2023]
Abstract
Bariatric surgery is very effective in achieving and maintaining weight loss but it is also associated with improvement of obesity metabolic complications, primarily type 2 diabetes (T2D). Remission of T2D or at least a net improvement of glycemic control persists for at least 5 years. The bypass of duodenum and of the first portion of the jejunum up to the Treitz ligament as in Roux-en-Y Gastric Bypass (RYGB), or the bypass of the duodenum, the entire jejunum and the first tract of the ileum, such as in Bilio-Pancreatic Diversion (BPD), achieve different results on insulin sensitivity. Insulin resistance is the major driver of T2D manifesting long before insulin secretion failure. In fact, T2D development can be prevented by treatment with insulin sensitizing agents. Interestingly, RYGB improves hepatic insulin sensitivity while BPD ameliorates whole-body insulin sensitivity. Two major theories have been advocated to explain the early remission of T2D following RYGB or BPD before a meaningful weight loss takes place, the foregut and the hindgut hypotheses. The former holds that the bypass of the proximal intestine, i.e. duodenum and jejunum, prevents the secretion of signals - including nervous transmitters and hormones - promoting insulin resistance, the latter instead states that the delivery of nutrients directly into the ileum stimulates the secretion of hormones improving glucose disposal. The most studied candidate is Glucagon Like Peptide 1 (GLP1). However, while there is unambiguous evidence that GLP-1 stimulates insulin secretion, its direct action in lowering insulin resistance, independently of the effect on weight loss secondary to its satiety action, is utterly controversial. In this review we examine the effects on T2D and gastrointestinal peptide secretion produced by different types of metabolic surgery and by minimally invasive endoscopic surgery, whose utilization for the treatment of obesity and T2D is gaining wider interest and acceptance.
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Affiliation(s)
| | | | - Geltrude Mingrone
- Department of Internal Medicine, Catholic University, Rome, Italy; Diabetes and Nutritional Sciences, Hodgkin Building, Guy's Campus, King's College London, London, United Kingdom.
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Moncada R, Becerril S, Rodríguez A, Méndez-Giménez L, Ramírez B, Catalán V, Gómez-Ambrosi J, Gil MJ, Fernández S, Cienfuegos JA, Valentí V, Frühbeck G. Sleeve Gastrectomy Reduces Body Weight and Improves Metabolic Profile also in Obesity-Prone Rats. Obes Surg 2017; 26:1537-48. [PMID: 26433590 DOI: 10.1007/s11695-015-1915-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Susceptibility to obesity is associated with a notable inter-individual variation. The aim of the present study was to compare the effectiveness of sleeve gastrectomy (SG) on weight loss and metabolic profile in obesity-prone (OP) rats vs animals that are non-susceptible to obesity (NSO). METHODS Young male Wistar rats (n = 101) were put in a diet-induced obesity (DIO) programme with ad libitum access to a high-fed diet (HFD) during 12 months. Body weight and food intake were regularly registered. Thereafter, rats were ranked by final body weight to identify the obesity-prone (OP) (n = 13) and non-susceptible to obesity (NSO) (n = 14) animals. OP and NSO rats were submitted to surgical interventions (sham operation, SG and pair-fed to the amount of food eaten by sleeve-gastrectomized rats). Body weight, food intake, energy expenditure, body temperature, fat pads weight, and metabolic profiling were analysed 4 weeks after surgical or dietary interventions. RESULTS SG in both OP and NSO rats decreased body weight as compared to sham and pair-fed groups (P < 0.05), mainly due to reductions in subcutaneous and perirenal fat mass (P < 0.001). Total weight loss achieved in sleeve-gastrectomized OP and NSO rats was higher than that of pair-fed ones (P < 0.05), showing that the SG effect goes beyond caloric restriction. In this regard, sleeve-gastrectomized rats exhibited significantly (P < 0.05) increased basal rectal temperature together with upregulated brown adipose tissue Ucp-1 protein expression levels. A significant (P < 0.05) improvement in insulin sensitivity was also observed in both OP and NSO animals that underwent SG as compared with pair-fed counterparts. CONCLUSION Our findings provide the first evidence that obesity-prone rats also benefit from surgery responding effectively to SG, as evidenced by the significant body weight reduction and the metabolic profile improvement.
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Affiliation(s)
- Rafael Moncada
- CIBEROBN, Instituto de Salud Carlos III, Madrid, Spain.,Obesity & Adipobiology Group, Instituto de Investigación Sanitario de Navarra (IdiSNA), Pamplona, Spain.,Department of Anesthesia, Clínica Universidad de Navarra, Pamplona, Spain
| | - Sara Becerril
- CIBEROBN, Instituto de Salud Carlos III, Madrid, Spain.,Obesity & Adipobiology Group, Instituto de Investigación Sanitario de Navarra (IdiSNA), Pamplona, Spain
| | - Amaia Rodríguez
- CIBEROBN, Instituto de Salud Carlos III, Madrid, Spain.,Obesity & Adipobiology Group, Instituto de Investigación Sanitario de Navarra (IdiSNA), Pamplona, Spain.,Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain
| | - Leire Méndez-Giménez
- CIBEROBN, Instituto de Salud Carlos III, Madrid, Spain.,Obesity & Adipobiology Group, Instituto de Investigación Sanitario de Navarra (IdiSNA), Pamplona, Spain.,Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain
| | - Beatriz Ramírez
- CIBEROBN, Instituto de Salud Carlos III, Madrid, Spain.,Obesity & Adipobiology Group, Instituto de Investigación Sanitario de Navarra (IdiSNA), Pamplona, Spain.,Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain
| | - Victoria Catalán
- CIBEROBN, Instituto de Salud Carlos III, Madrid, Spain.,Obesity & Adipobiology Group, Instituto de Investigación Sanitario de Navarra (IdiSNA), Pamplona, Spain.,Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain
| | - Javier Gómez-Ambrosi
- CIBEROBN, Instituto de Salud Carlos III, Madrid, Spain.,Obesity & Adipobiology Group, Instituto de Investigación Sanitario de Navarra (IdiSNA), Pamplona, Spain.,Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain
| | - M Jesús Gil
- CIBEROBN, Instituto de Salud Carlos III, Madrid, Spain.,Obesity & Adipobiology Group, Instituto de Investigación Sanitario de Navarra (IdiSNA), Pamplona, Spain.,Department of Biochemistry, Clínica Universidad de Navarra, Pamplona, Spain
| | - Secundino Fernández
- CIBEROBN, Instituto de Salud Carlos III, Madrid, Spain.,Obesity & Adipobiology Group, Instituto de Investigación Sanitario de Navarra (IdiSNA), Pamplona, Spain.,Department of Otorhinolaryngology, Clínica Universidad de Navarra, Pamplona, Spain
| | - Javier A Cienfuegos
- CIBEROBN, Instituto de Salud Carlos III, Madrid, Spain.,Obesity & Adipobiology Group, Instituto de Investigación Sanitario de Navarra (IdiSNA), Pamplona, Spain.,Department of Surgery, Clínica Universidad de Navarra, Pamplona, Spain
| | - Víctor Valentí
- CIBEROBN, Instituto de Salud Carlos III, Madrid, Spain.,Obesity & Adipobiology Group, Instituto de Investigación Sanitario de Navarra (IdiSNA), Pamplona, Spain.,Department of Surgery, Clínica Universidad de Navarra, Pamplona, Spain
| | - Gema Frühbeck
- CIBEROBN, Instituto de Salud Carlos III, Madrid, Spain. .,Obesity & Adipobiology Group, Instituto de Investigación Sanitario de Navarra (IdiSNA), Pamplona, Spain. .,Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain. .,Department of Endocrinology & Nutrition, Clínica Universidad de Navarra, Avda. Pío XII, 36, 31008, Pamplona, Spain.
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Deal RA, Tang Y, Fletcher R, Torquati A, Omotosho P. Understanding intestinal glucose transporter expression in obese compared to non-obese subjects. Surg Endosc 2017; 32:1755-1761. [PMID: 28936585 DOI: 10.1007/s00464-017-5858-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 08/22/2017] [Indexed: 01/06/2023]
Abstract
INTRODUCTION The impact of Roux-en-Y gastric bypass (RYGB) on weight loss and co-morbid disease resolution is well established. However, the mechanisms underlying the procedure remain incompletely understood. Intestinal remodeling involving glucose transporters (GLUTs) may play a crucial role. Rat studies have demonstrated morphological adaptation of GLUTs within adipose and intestinal cells in association with the reprogramming of glucose metabolism. There is a limited understanding of the variations in expression amongst GLUT family receptors in the human intestine. The aim of this study was to evaluate and describe jejunal GLUT expression patterns in the obese versus non-obese. METHODS Tissue samples were collected from 19 adults (age ≥18) patients with morbid obesity undergoing elective RYGB. Specimens were obtained from excess jejunum removed during the stapled jejuno-jejunal anastomosis. All subjects met National Institutes of Health criteria for bariatric surgery (body mass index or BMI ≥40 or ≥35 with obesity-related comorbidities). Exclusion criteria included age less than 18, age greater than 65, patients undergoing a revision procedure, and the presence of a seizure disorder (possible association with GLUT-1 deficiency syndrome). Five samples were obtained from non-obese subjects (average BMI 26.7) without diabetes who were consenting organ donors after brain death. Samples of jejunum from non-obese individuals were obtained at the time of organ procurement. Institutional Review Board and Gift of Hope approval was obtained. Specimens underwent quantitative real-time PCR and Western blotting. Western blot densitometry was performed using Image J software. Student T test was performed using SPSS statistics software. RESULTS GLUT-1 and GLUT-7 expression were not detected in the jejunum of either group. No difference in expression pattern was observed for GLUT-2, GLUT-4, and GLUT-9 between the groups. Western blot band density of GLUT-5 to loading control (GADPH) mean ratio was 0.21 (SD = 0.20) in obese specimens compared to 0.56 (SD = 0.17) in non-obese. Densitometry revealed GLUT-5 levels in the jejunum of the obese were significantly lower than non-obese specimens (P < 0.05). CONCLUSION The absence of GLUT-1 expression in both the obese and non-obese groups is consistent with the established view of GLUT-1 being abundantly present in fetal intestine but diminished to negligible levels by adulthood. Decreased GLUT-5 expression in samples from subjects with obesity compared to non-obese samples may represent a down-regulation of gene expression amongst the obese. The differential expression of GLUT-5 suggests a possible role in obesity. Studies of GLUT family expression will aid in understanding the impact of intestinal remodeling on obesity.
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Affiliation(s)
- Rebecca A Deal
- Division of Minimally Invasive and Bariatric Surgery, Department of-Surgery, Rush University Medical Center, Chicago, IL, 60612, USA.
| | - Yueming Tang
- Division of Minimally Invasive and Bariatric Surgery, Department of-Surgery, Rush University Medical Center, Chicago, IL, 60612, USA
| | - Reid Fletcher
- Division of Minimally Invasive and Bariatric Surgery, Department of-Surgery, Rush University Medical Center, Chicago, IL, 60612, USA
| | - Alfonso Torquati
- Division of Minimally Invasive and Bariatric Surgery, Department of-Surgery, Rush University Medical Center, Chicago, IL, 60612, USA
| | - Philip Omotosho
- Division of Minimally Invasive and Bariatric Surgery, Department of-Surgery, Rush University Medical Center, Chicago, IL, 60612, USA
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Effects of Bariatric Surgery on Change of Brown Adipocyte Tissue and Energy Metabolism in Obese Mice. Obes Surg 2017; 28:820-830. [DOI: 10.1007/s11695-017-2899-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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41
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Li W, Richard D. Effects of Bariatric Surgery on Energy Homeostasis. Can J Diabetes 2017; 41:426-431. [DOI: 10.1016/j.jcjd.2017.05.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 04/11/2017] [Accepted: 05/04/2017] [Indexed: 12/11/2022]
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42
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Albaugh VL, Banan B, Ajouz H, Abumrad NN, Flynn CR. Bile acids and bariatric surgery. Mol Aspects Med 2017; 56:75-89. [PMID: 28390813 PMCID: PMC5603298 DOI: 10.1016/j.mam.2017.04.001] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 02/27/2017] [Accepted: 04/04/2017] [Indexed: 12/12/2022]
Abstract
Bariatric surgery, specifically Roux-en-Y gastric bypass (RYGB) and vertical sleeve gastrectomy (VSG), are the most effective and durable treatments for morbid obesity and potentially a viable treatment for type 2 diabetes (T2D). The resolution rate of T2D following these procedures is between 40 and 80% and far surpasses that achieved by medical management alone. The molecular basis for this improvement is not entirely understood, but has been attributed in part to the altered enterohepatic circulation of bile acids. In this review we highlight how bile acids potentially contribute to improved lipid and glucose homeostasis, insulin sensitivity and energy expenditure after these procedures. The impact of altered bile acid levels in enterohepatic circulation is also associated with changes in gut microflora, which may further contribute to some of these beneficial effects. We highlight the beneficial effects of experimental surgical procedures in rodents that alter bile secretory flow without gastric restriction or altering nutrient flow. This information suggests a role for bile acids beyond dietary fat emulsification in altering whole body glucose and lipid metabolism strongly, and also suggests emerging roles for the activation of the bile acid receptors farnesoid x receptor (FXR) and G-protein coupled bile acid receptor (TGR5) in these improvements. The limitations of rodent studies and the current state of our understanding is reviewed and the potential effects of bile acids mediating the short- and long-term metabolic improvements after bariatric surgery is critically examined.
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MESH Headings
- Animals
- Bile Acids and Salts/metabolism
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/microbiology
- Diabetes Mellitus, Type 2/pathology
- Diabetes Mellitus, Type 2/surgery
- Enterohepatic Circulation
- Gastrectomy
- Gastric Bypass
- Gastrointestinal Microbiome/physiology
- Gene Expression Regulation
- Glucose/metabolism
- Homeostasis/physiology
- Humans
- Insulin Resistance
- Obesity, Morbid/metabolism
- Obesity, Morbid/microbiology
- Obesity, Morbid/pathology
- Obesity, Morbid/surgery
- Receptors, Cytoplasmic and Nuclear/genetics
- Receptors, Cytoplasmic and Nuclear/metabolism
- Receptors, G-Protein-Coupled/genetics
- Receptors, G-Protein-Coupled/metabolism
- Rodentia
- Signal Transduction
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Affiliation(s)
- Vance L Albaugh
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Babak Banan
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Hana Ajouz
- American University of Beirut, Beirut, Lebanon
| | - Naji N Abumrad
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Charles R Flynn
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
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Cavin JB, Bado A, Le Gall M. Intestinal Adaptations after Bariatric Surgery: Consequences on Glucose Homeostasis. Trends Endocrinol Metab 2017; 28:354-364. [PMID: 28209316 DOI: 10.1016/j.tem.2017.01.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 01/16/2017] [Accepted: 01/17/2017] [Indexed: 12/25/2022]
Abstract
The gastrointestinal (GI) tract can play a direct role in glucose homeostasis by modulating the digestion and absorption of carbohydrates and by producing the incretin hormones. In recent years, numerous studies have focused on intestinal adaptation following bariatric surgeries. Changes in the number of incretin (glucagon-like peptide 1 and glucose-dependent insulinotropic polypeptide) producing cells have been reported, which could result in the modified hormonal response seen after surgery. In addition, the rate of absorption and the intestinal regions exposed to sugars may affect the time course of appearance of glucose in the blood. This review gives new insights into the direct role of the GI tract in the metabolic outcomes of bariatric surgery, in the context of glucose homeostasis.
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Affiliation(s)
- Jean-Baptiste Cavin
- Inserm UMR 1149, UFR de Médecine Paris Diderot, Université Paris Diderot, Sorbonne Paris Cité, DHU Unity AP-HP, F-75890 Paris, France
| | - André Bado
- Inserm UMR 1149, UFR de Médecine Paris Diderot, Université Paris Diderot, Sorbonne Paris Cité, DHU Unity AP-HP, F-75890 Paris, France
| | - Maude Le Gall
- Inserm UMR 1149, UFR de Médecine Paris Diderot, Université Paris Diderot, Sorbonne Paris Cité, DHU Unity AP-HP, F-75890 Paris, France.
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Sanoyama D, Nagao M, Asai A, Nakamura Y, Sato K, Nakajima Y, Oikawa S, Sugihara H. Postprandial Increase in Energy Expenditure Correlates with Body Weight Reduction in Patients with Type 2 Diabetes Receiving Diet Therapy. J Atheroscler Thromb 2017; 24:422-429. [PMID: 27600919 PMCID: PMC5392480 DOI: 10.5551/jat.35303] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 07/19/2016] [Indexed: 12/21/2022] Open
Abstract
AIM The clinical significance of energy expenditure (EE) in the treatment of type 2 diabetes has not been fully elucidated. Here we analyzed the relationships between EE and clinical measurements in patients with type 2 diabetes receiving diet therapy. METHODS A total of 100 patients (34 women and 66 men) with type 2 diabetes admitted to our hospital for glycemic control were enrolled. The participants received an energy-restricted diet during their hospitalization (median, 15 days). EE was measured in the fasted (FEE) and postprandial (PPEE) states using indirect calorimetry. The postprandial increment of EE (ΔEE) was calculated from the FEE and PPEE (ΔEE=PPEE-FEE). RESULTS FEE, PPEE, and ΔEE were 0.997±0.203, 1.104±0.213, and 0.107±0.134 kcal/min, respectively. Body weight decreased from 68.7±16.6 to 66.8±16.0 kg (p<0.0001) during hospitalization. FEE and PPEE showed positive correlations with height, body weight, body mass index, and abdominal circumference at admission, but ΔEE was not correlated with these anthropometric measurements. On the other hand, ΔEE was inversely correlated with the body weight change. The association between ΔEE and the body weight change was independent of age, sex, and HbA1c. CONCLUSIONS Postprandial increase in energy expenditure may be a determinant of individual differences in weight reduction in patients with type 2 diabetes on diet therapy. As a simple surrogate for diet-induced thermogenesis, ΔEE may serve as a useful predictive marker for the efficacy of diet therapy.
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Affiliation(s)
- Daisuke Sanoyama
- Department of Endocrinology, Diabetes and Metabolism, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Mototsugu Nagao
- Department of Endocrinology, Diabetes and Metabolism, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Akira Asai
- Department of Endocrinology, Diabetes and Metabolism, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
- Food and Health Science Research Unit, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Yuko Nakamura
- Department of Endocrinology, Diabetes and Metabolism, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Kazumi Sato
- Department of Nutrition, Nippon Medical School Hospital, Tokyo, Japan
| | - Yasushi Nakajima
- Department of Endocrinology, Diabetes and Metabolism, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Shinichi Oikawa
- Department of Endocrinology, Diabetes and Metabolism, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Hitoshi Sugihara
- Department of Endocrinology, Diabetes and Metabolism, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
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Olsen MK, Johannessen H, Cassie N, Barrett P, Takeuchi K, Kulseng B, Chen D, Zhao CM. Steady-state energy balance in animal models of obesity and weight loss. Scand J Gastroenterol 2017; 52:442-449. [PMID: 27996337 DOI: 10.1080/00365521.2016.1267791] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE We wanted to exam the steady-state energy balance by using high-fat diet-induced obese (DIO) rats and mice as models for positive energy balance, and gastric bypassed (GB) rats and gene knockout of muscarinic acetylcholine M3 receptor (M3KO) mice as models for negative energy balance. METHODS One hundred and thirty-two rats and mice were used. Energy balance was measured by a comprehensive laboratory animal monitoring system. Gene expression was analysed by in situ hybridisation in M3KO mice. RESULTS DIO rats reached the plateau of body weight 28 weeks after starting high-fat diet (25% heavier than controls), whereas DIO mice reached the plateau after 6 weeks (23% heavier than controls). At the plateau, DIO rats had higher calorie intake during the light phase but not during the dark phase, while mice had the same calorie intake per day as controls. DIO rats and mice had lower energy expenditure (EE) and respiratory exchange ratio (RER) than controls. GB-rats reached the plateau (15% weight loss) 2 weeks after surgery and had the same calorie intake as sham-operated controls. EE, but not RER, was higher in GB rats than controls during the dark phase. The lean M3KO mice (25% lighter than wild-type (WT) mice at the plateau between 6 and 15 months of age) had the same calorie intake but higher EE, RER and hypothalamic mRNA expression of NPY, AgRP and leptin receptor than WT mice. CONCLUSION When body weight gain or loss reached a plateau, the steady-state energy balance was mainly maintained by EE and/or RER rather than calorie intake.
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Affiliation(s)
- Magnus Kringstad Olsen
- a Department of Cancer Research and Molecular Medicine , Norwegian University of Science and Technology , Trondheim , Norway
| | - Helene Johannessen
- a Department of Cancer Research and Molecular Medicine , Norwegian University of Science and Technology , Trondheim , Norway
| | - Nikki Cassie
- b The Rowett Institute, University of Aberdeen , Aberdeen , Scotland
| | - Perry Barrett
- b The Rowett Institute, University of Aberdeen , Aberdeen , Scotland
| | - Koji Takeuchi
- c Department of Pharmacology and Experimental Therapeutics , Kyoto Pharmaceutical University , Kyoto , Japan
| | - Bård Kulseng
- a Department of Cancer Research and Molecular Medicine , Norwegian University of Science and Technology , Trondheim , Norway.,d Department of Surgery , Centre for Obesity Research and Innovation, St. Olav's University Hospital , Trondheim , Norway
| | - Duan Chen
- a Department of Cancer Research and Molecular Medicine , Norwegian University of Science and Technology , Trondheim , Norway.,d Department of Surgery , Centre for Obesity Research and Innovation, St. Olav's University Hospital , Trondheim , Norway
| | - Chun-Mei Zhao
- a Department of Cancer Research and Molecular Medicine , Norwegian University of Science and Technology , Trondheim , Norway
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van Nierop FS, Scheltema MJ, Eggink HM, Pols TW, Sonne DP, Knop FK, Soeters MR. Clinical relevance of the bile acid receptor TGR5 in metabolism. Lancet Diabetes Endocrinol 2017; 5:224-233. [PMID: 27639537 DOI: 10.1016/s2213-8587(16)30155-3] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 06/23/2016] [Accepted: 06/23/2016] [Indexed: 01/01/2023]
Abstract
The bile acid receptor TGR5 (also known as GPBAR1) is a promising target for the development of pharmacological interventions in metabolic diseases, including type 2 diabetes, obesity, and non-alcoholic steatohepatitis. TGR5 is expressed in many metabolically active tissues, but complex enterohepatic bile acid cycling limits the exposure of some of these tissues to the receptor ligand. Profound interspecies differences in the biology of bile acids and their receptors in different cells and tissues exist. Data from preclinical studies show promising effects of targeting TGR5 on outcomes such as weight loss, glucose metabolism, energy expenditure, and suppression of inflammation. However, clinical studies are scarce. We give a summary of key concepts in bile acid metabolism; outline different downstream effects of TGR5 activation; and review available data on TGR5 activation, with a focus on the translation of preclinical studies into clinically applicable findings. Studies in rodents suggest an important role for Tgr5 in Glp-1 secretion, insulin sensitivity, and energy expenditure. However, evidence of effects on these processes from human studies is less convincing. Ultimately, safe and selective human TGR5 agonists are needed to test the therapeutic potential of TGR5.
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Affiliation(s)
- F Samuel van Nierop
- Department of Endocrinology and Metabolism, Academic Medical Center, Amsterdam, Netherlands
| | - Matthijs J Scheltema
- Department of Endocrinology and Metabolism, Academic Medical Center, Amsterdam, Netherlands
| | - Hannah M Eggink
- Department of Endocrinology and Metabolism, Academic Medical Center, Amsterdam, Netherlands
| | - Thijs W Pols
- Department of Biochemistry, Academic Medical Center, Amsterdam, Netherlands
| | - David P Sonne
- Center for Diabetes Research, Gentofte Hospital, University of Copenhagen, Hellerup, Denmark
| | - Filip K Knop
- Center for Diabetes Research, Gentofte Hospital, University of Copenhagen, Hellerup, Denmark; NNF Center for Basic Metabolic Research and Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Hellerup, Denmark
| | - Maarten R Soeters
- Department of Endocrinology and Metabolism, Academic Medical Center, Amsterdam, Netherlands.
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Steensels S, Lannoo M, Avau B, Laermans J, Vancleef L, Farré R, Verbeke K, Depoortere I. The role of nutrient sensing in the metabolic changes after gastric bypass surgery. J Endocrinol 2017; 232:363-376. [PMID: 27980002 DOI: 10.1530/joe-16-0541] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 12/15/2016] [Indexed: 12/24/2022]
Abstract
Taste receptors coupled to the gustatory G-protein, gustducin, on enteroendocrine cells sense nutrients to regulate gut hormone release. During Roux-en-Y gastric bypass (RYGB) surgery, the altered nutrient flow to more distal regions can affect gustducin-mediated gut hormone release and hence energy and glucose homeostasis. We studied the role of gustducin-mediated signaling in the metabolic improvements and intestinal adaptations along the gut after RYGB surgery in wild-type (WT) and α-gustducin-/- (α-gust-/-) mice. RYGB surgery decreased body weight in WT and α-gust-/- mice, whereas food intake was only decreased in WT mice. Pair-feeding to the RYGB group improved glucose homeostasis to a similar extent in WT mice. GLP1 levels were increased in both genotypes, PYY levels in α-gust-/- mice and octanoyl ghrelin levels were not affected after RYGB surgery. In WT mice, nutrients act via α-gustducin to increase L-cell differentiation (foregut) and L-cell number (foregut and hindgut) in a region-dependent manner. In α-gust-/- mice, the effect on gut hormone levels is probably tuned via increased peptide sensor and glucose transporter expression in the Roux limb and increased caecal butyrate and propionate levels in the hindgut that activate free fatty acid receptors. Finally, signaling via α-gustducin plays a role in the increased ion transport of the foregut but not in the improvement in colonic barrier function. In conclusion, RYGB surgery decreased body weight in both WT and α-gust-/- mice. Elevated plasma GLP1 and PYY levels might mediate this effect, although α-gustducin differentially affects several regulatory systems in the foregut and hindgut, tuning gut hormone release.
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Affiliation(s)
| | - Matthias Lannoo
- Abdominal SurgeryUniversity Hospital of Leuven, Leuven, Belgium
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48
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Evers SS, Sandoval DA, Seeley RJ. The Physiology and Molecular Underpinnings of the Effects of Bariatric Surgery on Obesity and Diabetes. Annu Rev Physiol 2017; 79:313-334. [DOI: 10.1146/annurev-physiol-022516-034423] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Simon S. Evers
- Department of Surgery, University of Michigan, Ann Arbor, Michigan 48109;
| | - Darleen A. Sandoval
- Department of Surgery, University of Michigan, Ann Arbor, Michigan 48109;
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan 48109
| | - Randy J. Seeley
- Department of Surgery, University of Michigan, Ann Arbor, Michigan 48109;
- Department of Nutritional Sciences, University of Michigan, Ann Arbor, Michigan 48109
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49
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Mu S, Liu J, Guo W, Zhang S, Xiao X, Wang Z, Zhang J. Roux-en-Y Gastric Bypass Improves Hepatic Glucose Metabolism Involving Down-Regulation of Protein Tyrosine Phosphatase 1B in Obese Rats. Obes Facts 2017; 10:191-206. [PMID: 28564652 PMCID: PMC5644909 DOI: 10.1159/000470912] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 03/09/2017] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVE This study was initiated to investigate the effects of Roux-en-Y gastric bypass (RYGB) surgery on hepatic glucose metabolism and hepatic expression of protein tyrosine phosphatase 1B (PTP1B) in obese rats. METHODS Body weight, glucose, intraperitoneal glucose, insulin, and pyruvate tolerance tests were performed pre- and postoperatively, and plasma lipid, insulin and glucagon-like peptide 1 (GLP-1) were measured. The mRNA levels of G6Pase, Pepck, Gsk-3β and Gys-2, and the expression levels of PTP1B mRNA, protein, and other components of the insulin signaling pathway were measured by using RT-PCR and western blotting. The intracellular localization of PTP1B and hepatic glycogen deposition was also observed. RESULTS RYGB surgery-treated rats showed persistent weight loss, significantly improved glucose tolerance, pyruvate tolerance, and dyslipidemia, as well as increased insulin sensitivity, hepatic glycogen deposition and increased plasma GLP-1 in obese rats. RT-PCR analyses showed Pepck, G6Pase, and Gsk-3β mRNA to be significantly decreased, and Gys-2 mRNA to be significantly increased in liver tissue in the RYGB group (p < 0.05 vs. high-fat diet (HFD) or HFD + sham group); in addition, the expression of PTP1B were significantly decreased and insulin signaling were improved in the RYGB group (p < 0.05 vs. HFD or HFD + sham group). CONCLUSION RYGB can improve hepatic glucose metabolism and down-regulate PTP1B in obese rats. An increased circulating GLP-1 concentration may be correlated with the effects following RYGB in obese rats.
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Affiliation(s)
- Song Mu
- Department of General Surgery, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jiayu Liu
- Department of Endocrinology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Wei Guo
- Department of General Surgery, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Shuping Zhang
- Department of Endocrinology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xiaoqiu Xiao
- Laboratory of Lipid & Glucose Metabolism, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Zhihong Wang
- Department of Endocrinology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- *Dr. Jun Zhang and Dr. Zhihong Wang, Department of General Surgery And Department of Endocrinology, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Yuzhong District, Chongqing 400016, China, ;
| | - Jun Zhang
- Department of General Surgery, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- *Dr. Jun Zhang and Dr. Zhihong Wang, Department of General Surgery And Department of Endocrinology, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Yuzhong District, Chongqing 400016, China, ;
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50
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Lutz TA. Gut hormones such as amylin and GLP-1 in the control of eating and energy expenditure. INTERNATIONAL JOURNAL OF OBESITY SUPPLEMENTS 2016; 6:S15-S21. [PMID: 28685025 DOI: 10.1038/ijosup.2016.4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The control of meal size is the best studied aspect of the control of energy balance, and manipulation of this system constitutes a promising target to treat obesity. A major part of this control system is based on gastrointestinal hormones such as glucagon-like peptide-1 (GLP-1) or amylin, which are released in response to a meal and which limit the size of an ongoing meal. Both amylin and GLP-1 have also been shown to increase energy expenditure in experimental rodents, but mechanistically we know much less how this effect may be mediated, which brain sites may be involved, and what the physiological relevance of these findings may be. Most studies indicate that the effect of peripheral amylin is centrally mediated via the area postrema, but other brain areas, such as the ventral tegmental area, may also be involved. GLP-1's effect on eating seems to be mainly mediated by vagal afferents projecting to the caudal hindbrain. Chronic exposure to amylin, GLP-1 or their analogs decrease food intake and body weight gain. Next to the induction of satiation, amylin may also constitute an adiposity signal and in fact interact with the adiposity signal leptin. Amylin analogs are under clinical consideration for their effect to reduce food intake and body weight in humans, and similar to rodents, amylin analogs seem to be particularly active when combined with leptin analogs.
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Affiliation(s)
- T A Lutz
- Institute of Veterinary Physiology, Vetsuisse Faculty University of Zurich, Zurich, Switzerland.,Zurich Center of Integrative Human Physiology, University of Zurich, Zurich, Switzerland
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