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metabolic changes post bariatric surgery

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https://www.readbyqxmd.com/read/29218660/how-bariatric-surgery-affects-liver-volume-and-fat-density-in-nafld-patients
#1
Ran B Luo, Toshiaki Suzuki, Jonathan C Hooker, Yesenia Covarrubias, Alexandra Schlein, Shanglei Liu, Jeffrey B Schwimmer, Scott B Reeder, Luke M Funk, Jacob A Greenberg, Guilherme M Campos, Bryan J Sandler, Santiago Horgan, Claude B Sirlin, Garth R Jacobsen
INTRODUCTION: Nonalcoholic fatty liver disease (NAFLD) is an epidemic in the obese population. Bariatric surgery is known to reverse multiple metabolic complications of obesity such as diabetes, dyslipidemia, and NAFLD, but the timing of liver changes has not been well described. MATERIALS AND METHODS: This was an IRB-approved, two-institutional prospective study. Bariatric patients received MRIs at baseline and after a pre-operative liquid diet. Liver biopsies were performed during surgery and if NAFLD positive, the patients received MRIs at 1, 3, and 6 months...
December 7, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/29117619/development-of-obesity-associated-comorbidities-post-bariatric-surgery-with-a-special-focus-on-diabetes-remission-and-short-term-relapse
#2
Nina Riedel, Anne Lautenbach, Jan Wilhelm Wienecke, Oliver Mann, Jörg Flitsch, Jens Aberle
Purpose The purpose of this study is to study a heterogeneous group of obese patients undergoing Bariatric surgery(BS) and its impact on glycemic control. Secondary endpoints include changes in lipid profile and albuminuria. BS has shown to effectively reduce body-weight. However, the impact on obesity-related comorbidities varies strongly between individuals. Especially postoperative short- and long-term improvement of Diabetes is an active area of investigation. Methods We conducted a retrospective analysis from baseline to 24 months post bariatric surgery in our interdisciplinary obesity outpatient-clinic...
November 8, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/29098545/non-alcoholic-fatty-liver-disease-in-morbidly-obese-individuals-undergoing-bariatric-surgery-prevalence-and-effect-of-the-pre-bariatric-very-low-calorie-diet
#3
Katherine J P Schwenger, Sandra E Fischer, Timothy D Jackson, Allan Okrainec, Johane P Allard
BACKGROUND: Non-alcoholic fatty liver disease (NAFLD) affects 75 to 100% of the patients undergoing bariatric surgery (BSx), with non-alcoholic steatohepatitis (NASH) being present in 24 to 98% of the patients. We do not know whether these rates were before or after a very low calorie diet (VLCD) often prescribed before laparoscopic BSx and what is the prevalence of NAFLD post-VLCD. PURPOSE: The purpose of this study is to determine the prevalence of simple steatosis (SS) and NASH in obese individuals undergoing BSx post-VLCD and assess biochemical markers pre- and post-VLCD in a subgroup of patients...
November 2, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/29071108/the-effect-of-bariatric-surgery-on-serum-25-oh-vitamin-d-levels-a-systematic-review-and-meta-analysis
#4
A Kalani, H Bami, M Tiboni, R Jaeschke, J D Adachi, A N Lau
BACKGROUND: Concerns have emerged about post-operative decreases in calcium and vitamin D following bariatric surgery. This review explores changes in metabolic bone health in persons with obesity undergoing gastric bypass surgery compared to non-surgical controls, providing an updated and comprehensive perspective on the literature. METHODS: An electronic search was conducted in MEDLINE, Pubmed, EMBASE and Cochrane databases to 8 November 2016. Eligible trials included randomized controlled trials or controlled observational studies of patients who have undergone laparoscopic gastric bypass surgery...
September 2017: Obesity Science & Practice
https://www.readbyqxmd.com/read/29065430/lipidomic-changes-in-skeletal-muscle-in-patients-after-biliopancreatic-diversion
#5
Carola Sabine Mehnert, Juergen Graessler, Virginia Kamvissi-Lorenz, Lidia Castagneto Gissey, James R Casella Mariolo, Giovanni Casella, Geltrude Mingrone, Stefan R Bornstein
The mechanisms behind the fast improvements of insulin sensitivity and release of the diabetic metabolic state after bariatric surgery are still not completely understood. To further elucidate the effects on the individual cellular level, we applied mass spectrometry to investigate the changes in the lipidomic profile of skeletal muscle cells before and after biliopancreatic diversion in six patients. We found a decrease in lipid storage species, mainly triacylglycerides (e. g., TAG 52:2 from 19.84 to 13...
November 2017: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/29064512/adiponectin-promoter-polymorphisms-are-predictors-of-lipid-profile-improvement-after-bariatric-surgery
#6
Aline Simas Gasparotto, Diego Olschowsky Borges, Marília Remuzzi Zandoná, Mauricio Jacques Ramos, Nelson Guardiola Meihnardt, Vanessa S Mattevi
Our aim was to investigate if single nucleotide polymorphisms (SNPs) located in the 5' regions of leptin (LEP, -2548 G > A, rs7799039), resistin (RETN, -420 C > G, rs1862513) and adiponectin (ADIPOQ, -11391 G > A, rs17300539 and -11377 C > G, rs266729) genes were related to changes in body mass index (BMI) and metabolic variables after bariatric surgery in 60 extremely obese individuals. At baseline, ADIPOQ -11391 A-allele carriers showed higher plasma adiponectin and lower total cholesterol levels when compared to G/G homozygotes...
October 23, 2017: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/29040429/the-role-of-glp-1-in-the-metabolic-success-bariatric-surgery
#7
Chelsea R Hutch, Darleen Sandoval
Two of the most popular bariatric procedures, vertical sleeve gastrectomy (VSG) and Roux-en-Y gastric bypass (RYGB), are commonly considered 'metabolic surgeries' because they are thought to impact metabolism in a weight loss-independent manner. In support of this, improvements in glucose homeostasis, insulin sensitivity, and even discontinuation of type 2 diabetes mellitus (T2DM) medication can occur before substantial postoperative weight loss. The mechanisms that underlie this effect are unknown. However, one of the common findings after VSG and RYGB in both animal models and in humans is the sharp postprandial rise in several gut peptides, including the incretin and satiety peptide, glucagon-like peptide-1 (GLP-1)...
October 9, 2017: Endocrinology
https://www.readbyqxmd.com/read/28751961/effect-of-bariatric-surgery-on-adiposity-and-metabolic-profiles-a-prospective-cohort-study-in-middle-eastern-patients
#8
Mohsen Mazidi, Peyman Rezaie, Ali Jangjoo, Alireza Tavassoli, Mohammad Taghi Rajabi, Andre Pascal Kengne, Mohsen Nematy
AIM: To investigate changes in adiposity and cardio-metabolic risk profile following Roux-en-Y gastric bypass in patients of Middle Eastern ethnicity with severe obesity. METHODS: This prospective cohort study involved 92 patients who met the indications of bariatric surgery. Post-procedure markers of obesity and cardiometabolic profile were monitored regularly for a year. RESULTS: Mean body mass index decreased by 29.5% from 41.9 to 29.5 kg/m(2) between baseline and 12-mo follow-up, while mean fat mass decreased by 45...
July 15, 2017: World Journal of Diabetes
https://www.readbyqxmd.com/read/28673470/differential-acute-and-chronic-responses-in-insulin-action-in-cultured-myotubes-following-from-nondiabetic-severely-obese-humans-following-gastric-bypass-surgery
#9
J Matthew Hinkley, Kai Zou, Sanghee Park, Donghai Zheng, G Lynis Dohm, Joseph A Houmard
BACKGROUND: Roux-en-Y gastric bypass (RYGB) surgery has been shown to induce positive metabolic adaptations for individuals with severe obesity (body mass index ≥40 kg/m(2)), including improved peripheral insulin action. Although a major site of insulin action, the time course changes in skeletal muscle glucose metabolism following RYGB is unclear. OBJECTIVES: To investigate the acute and chronic effects of RYGB surgery on insulin-stimulated glucose metabolism in cultured human primary myotubes derived from nondiabetic severely obese humans...
November 2017: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28649469/distinct-patterns-in-the-gut-microbiota-after-surgical-or-medical-therapy-in-obese-patients
#10
Daniel A Medina, Juan P Pedreros, Dannae Turiel, Nicolas Quezada, Fernando Pimentel, Alex Escalona, Daniel Garrido
Bariatric surgery is highly successful in improving health compared to conventional dietary treatments. It has been suggested that the gut microbiota is a relevant factor in weight loss after bariatric surgery. Considering that bariatric procedures cause different rearrangements of the digestive tract, they probably have different effects on the gut microbiota. In this study, we compared the impact of medical treatment, sleeve gastrectomy and Roux-en-Y gastric bypass on the gut microbiota from obese subjects...
2017: PeerJ
https://www.readbyqxmd.com/read/28548658/distinctive-microbiomes-and-metabolites-linked-with-weight-loss-after-gastric-bypass-but-not-gastric-banding
#11
Zehra Esra Ilhan, John K DiBaise, Nancy G Isern, David W Hoyt, Andrew K Marcus, Dae-Wook Kang, Michael D Crowell, Bruce E Rittmann, Rosa Krajmalnik-Brown
Roux-en-Y gastric bypass (RYGB) and laparoscopic adjustable gastric banding (LAGB) are anatomically different bariatric operations. RYGB achieves greater weight loss compared with LAGB. Changes in the gut microbiome have been documented after RYGB, but not LAGB, and the microbial contribution to sustainable surgical weight loss warrants further evaluation. We hypothesized that RYGB imposes greater changes on the microbiota and its metabolism than LAGB, and that the altered microbiota may contribute to greater weight loss...
September 2017: ISME Journal
https://www.readbyqxmd.com/read/28444860/aspirin-responsiveness-changes-in-obese-patients-following-bariatric-surgery
#12
Nicholas B Norgard, Scott V Monte, Stanley F Fernandez, Qing Ma
AIMS: Bariatric surgery has emerged as a promising treatment option for weight loss and to counter the metabolic consequences of obesity. Obesity has been linked to a hyperaggregable state, as well as a blunted response to aspirin. This pilot study assessed the hypothesis that bariatric surgery would lead to an improvement in aspirin-induced platelet inhibition and a reduction in platelet aggregability. METHODS: Fifteen patients scheduled to undergo bariatric surgery were administered two 7-day courses of aspirin 81 mg: the first course administered before surgery and the second was 3 months following surgery...
August 2017: Cardiovascular Therapeutics
https://www.readbyqxmd.com/read/28429404/air-pollution-weight-loss-and-metabolic-benefits-of-bariatric-surgery-a-potential-model-for-study-of-metabolic-effects-of-environmental-exposures
#13
R Ghosh, W J Gauderman, H Minor, H A Youn, F Lurmann, K R Cromar, L Chatzi, B Belcher, C R Fielding, R McConnell
BACKGROUND: Emerging experimental evidence suggests that air pollution may contribute to development of obesity and diabetes, but studies of children are limited. OBJECTIVES: We hypothesized that pollution effects would be magnified after bariatric surgery for treatment of obesity, reducing benefits of surgery. METHODS: In 75 obese adolescents, excess weight loss (EWL), high-density lipoprotein (HDL) cholesterol, triglycerides, alkaline phosphatase (ALP) and hemoglobin A1c (HbA1c ) were measured prospectively at baseline and following laparoscopic adjustable gastric banding (LAGB)...
April 21, 2017: Pediatric Obesity
https://www.readbyqxmd.com/read/28299572/early-weight-loss-independent-effects-of-sleeve-gastrectomy-on-diet-induced-cardiac-dysfunction-in-obese-wistar-rats
#14
Tammy L Kindel, Tom Foster, Paul Goldspink, Steven J Kindel, John Corbett, Michael Widlanksy, Jennifer Strande
INTRODUCTION: Several reports suggest that bariatric surgery significantly improves cardiac function in patients with obesity cardiomyopathy. The mechanism is unknown but may be due to weight-loss independent factors. We predict that the changes in gastrointestinal anatomy after a rodent model of sleeve gastrectomy (SG) will have weight-loss independent effects on cardiac dysfunction. METHODOLOGY: Cardiac dysfunction was induced by feeding a 60% kcal from fat diet to male Wistar rats for 10 weeks...
September 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28258704/non-alcoholic-fatty-liver-disease-phosphoproteomics-a-functional-piece-of-the-precision-puzzle
#15
Julia Wattacheril, Kristie L Rose, Salisha Hill, Christian Lanciault, Clark R Murray, Kay Washington, Brandon Williams, Wayne English, Matthew Spann, Ronald Clements, Naji Abumrad, Charles Robb Flynn
BACKGROUND: Molecular signaling events associated with the necroinflammatory changes in nonalcoholic steatohepatitis (NASH) are not well understood. AIMS: To understand the molecular basis of NASH, we evaluated reversible phosphorylation events in hepatic tissue derived from Class III obese subjects by phosphoproteomic means with the aim of highlighting key regulatory pathways that distinguish NASH from non-alcoholic fatty liver disease (also known as simple steatosis; SS)...
March 4, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/28202005/impact-of-gut-hormone-fgf-19-on-type-2-diabetes-and-mitochondrial-recovery-in-a-prospective-study-of-obese-diabetic-women-undergoing-bariatric-surgery
#16
Lucia Martinez de la Escalera, Ioannis Kyrou, Jana Vrbikova, Voitech Hainer, Petra Sramkova, Martin Fried, Milan K Piya, Sudhesh Kumar, Gyanendra Tripathi, Philip G McTernan
BACKGROUND: The ileal-derived hormone, fibroblast growth factor 19 (FGF-19), may promote weight loss and facilitate type-2 diabetes mellitus remission in bariatric surgical patients. We investigated the effect of different bariatric procedures on circulating FGF-19 levels and the resulting impact on mitochondrial health in white adipose tissue (AT). METHODS: Obese and type-2 diabetic women (n = 39, BMI > 35 kg/m(2)) undergoing either biliopancreatic diversion (BPD), laparoscopic greater curvature plication (LGCP), or laparoscopic adjustable gastric banding (LAGB) participated in this ethics approved study...
February 16, 2017: BMC Medicine
https://www.readbyqxmd.com/read/27986580/no-effect-of-different-bariatric-surgery-procedures-on-line-1-dna-methylation-in-diabetic-and-nondiabetic-morbidly-obese-patients
#17
G M Martín-Núñez, A Cabrera-Mulero, J Alcaide-Torres, E García-Fuentes, F J Tinahones, S Morcillo
BACKGROUND: Bariatric surgery (BS) is proposed as a highly effective therapy for reducing weight and improving obesity-related co-morbidities. The molecular mechanisms involved in the metabolic improvement after BS are not completely resolved. Epigenetic modifications could have an important role. OBJECTIVE: The aim of this study was to evaluate the effect of different BS procedures (Roux-en-Y gastric bypass and laparoscopic sleeve gastrectomy) on global DNA methylation (long interspersed nucleotide element 1 [LINE-1]) in a group of nondiabetic and diabetic severely obese patients...
October 21, 2016: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/27900559/upregulated-tnf-expression-1%C3%A2-year-after-bariatric-surgery-reflects-a-cachexia-like-state-in-subcutaneous-adipose-tissue
#18
Alexander Jürets, Bianca Karla Itariu, Magdalena Keindl, Gerhard Prager, Felix Langer, Viktor Grablowitz, Maximilian Zeyda, Thomas Michael Stulnig
BACKGROUND: Adipose tissue dysfunction contributes to obesity-associated chronic diseases. In the first year after bariatric surgery, obese patients significantly improve their metabolic status upon losing weight. We aimed to investigate whether changes in subcutaneous adipose tissue gene expression reflect a restoration of a healthy lean phenotype after bariatric surgery. METHODS: Thirty-one severely obese patients (BMI ≥ 40 kg/m(2)) were examined before and after surgery...
June 2017: Obesity Surgery
https://www.readbyqxmd.com/read/27818311/changes-in-bone-metabolism-after-bariatric-surgery-by-gastric-bypass-or-sleeve-gastrectomy
#19
Kaisa K Ivaska, Ville Huovinen, Minna Soinio, Jarna C Hannukainen, Virva Saunavaara, Paulina Salminen, Mika Helmiö, Riitta Parkkola, Pirjo Nuutila, Riku Kiviranta
Bariatric surgery results in rapid weight loss and beneficial metabolic effects, but may have negative effects on the skeleton. The objective of this prospective study was to evaluate changes in bone metabolism in response to bariatric surgery with two surgical techniques. 46 morbidly obese subjects (mean 44.9years, BMI 42.1) with (n=19) or without (n=27) type 2 diabetes (T2DM) at baseline underwent either Roux-en-Y gastric bypass (RYGB, n=21) or sleeve gastrectomy (SG, n=25). Bone turnover markers (CTX, PINP, TRAcP5b, TotalOC and ucOC) were measured before and six months after surgery...
February 2017: Bone
https://www.readbyqxmd.com/read/27787482/fasting-and-post-prandial-peptide-yy-levels-in-obese-patients-before-and-after-mini-versus-roux-en-y-gastric-bypass
#20
Jolanta A Dardzińska, Łukasz Kaska, Piotr Wiśniewski, Ewa Aleksandrowicz-Wrona, Sylwia Małgorzewicz
BACKGROUNDː The mechanisms underlying the metabolic effect of surgical treatment for morbid obesity are still unclear. Furthermore, the hormonal and metabolic response to the promising and less-invasive version of Roux-en-Y gastric bypass (RYGB), i.e. mini gastric bypass (MGB), is poorly known. The aim of this study was to evaluate pre- and postprandial changes in peptide YY (PYY) and metabolic parameters in obese patients without diabetes and cardiovascular complications treated by both versions of gastric bypass...
February 2017: Minerva Chirurgica
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