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metabolic changes post bariatric surgery

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https://www.readbyqxmd.com/read/28548658/distinctive-microbiomes-and-metabolites-linked-with-weight-loss-after-gastric-bypass-but-not-gastric-banding
#1
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...
May 26, 2017: ISME Journal
https://www.readbyqxmd.com/read/28444860/aspirin-responsiveness-changes-in-obese-patients-following-bariatric-surgery
#2
Nicholas B Norgard, Scott V Monte, Stanley F Fernandez, Qing Ma
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...
April 26, 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
#3
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
#4
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...
March 15, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28258704/nafld-phosphoproteomics-a-functional-piece-of-the-precision-puzzle
#5
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
Molecular signaling events associated with the necroinflammatory changes in nonalcoholic steatohepatitis are not well understood. 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 NAFLD. Class III obese subjects undergoing bariatric surgery underwent liver biopsy (8 NOR, 8 simple steatosis and 8 NASH). Our strategy was unbiased, comparing global differences in liver protein reversible phosphorylation events across the 24 subjects...
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
#6
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
#7
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
#8
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
#9
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
#10
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
https://www.readbyqxmd.com/read/27738970/differential-changes-in-gut-microbiota-after-gastric-bypass-and-sleeve-gastrectomy-bariatric-surgery-vary-according-to-diabetes-remission
#11
Rinki Murphy, Peter Tsai, Mia Jüllig, Amy Liu, Lindsay Plank, Michael Booth
BACKGROUND: It is unclear whether specific gut microbiota is associated with remission of type 2 diabetes (T2D) after distinct types of bariatric surgery. AIMS: The aim of this study is to examine gut microbiota changes after laparoscopic Roux-en-Y gastric bypass (RYGB) or sleeve gastrectomy (SG) surgery in obese patients with T2D. METHODS: Whole-metagenome shotgun sequencing of DNA fragments using Illumina HiSeq2000 was obtained from stool samples collected from 14 obese T2D patients pre-operatively (while on very low calorie diet) and 1 year after randomisation to laparoscopic SG (n = 7) or RYGB (n = 7)...
October 13, 2016: Obesity Surgery
https://www.readbyqxmd.com/read/27670865/a-mindfulness-based-intervention-to-control-weight-after-bariatric-surgery-preliminary-results-from-a-randomized-controlled-pilot-trial
#12
RANDOMIZED CONTROLLED TRIAL
Sara A Chacko, Gloria Y Yeh, Roger B Davis, Christina C Wee
OBJECTIVE: This study aimed to develop and test a novel mindfulness-based intervention (MBI) designed to control weight after bariatric surgery. DESIGN: Randomized, controlled pilot trial. SETTING: Beth Israel Deaconess Medical Center, Boston, MA, USA. INTERVENTIONS: Bariatric patients 1-5 years post-surgery (n=18) were randomized to receive a 10-week MBI or a standard intervention. MAIN OUTCOME MEASURES: Primary outcomes were feasibility and acceptability of the MBI...
October 2016: Complementary Therapies in Medicine
https://www.readbyqxmd.com/read/27649688/increased-glucose-stimulated-fgf21-response-to-oral-glucose-in-obese-nondiabetic-subjects-after-roux-en-y-gastric-bypass
#13
S G Vienberg, S H Jacobsen, D Worm, L E Hvolris, L Naver, T Almdal, D L Hansen, B S Wulff, T R Clausen, S Madsbad, J J Holst, B Andersen
OBJECTIVE: The positive metabolic outcome of Roux-en-Y gastric bypass (RYGB) surgery may involve fibroblast growth factor 21 (FGF21), in both the fasting state and postprandially. We measured the fasting levels of FGF21 before and after bariatric surgery as well as the postprandial FGF21 responses after a glucose load and after a mixed meal. DESIGN: Observational intervention trial. PATIENTS AND MEASUREMENTS: Eight obese, nondiabetic patients underwent RYGB...
January 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/27465735/peripheral-circadian-misalignment-contributor-to-systemic-insulin-resistance-and-potential-intervention-to-improve-bariatric-surgical-outcomes
#14
REVIEW
Kyle N Kunze, Erin C Hanlon, Vivek N Prachand, Matthew J Brady
Thirteen percent of the world's population suffers from obesity and 39% from being overweight, which correlates with an increase in numerous secondary metabolic complications, such as Type 2 diabetes mellitus. Bariatric surgery is the most effective treatment for severe obesity and results in significant weight loss and the amelioration of obesity-related comorbidities through changes in enteroendocrine activity, caloric intake, and alterations in gut microbiota composition. The circadian system has recently been found to be a critical regulatory component in the control of metabolism and, thus, may potentially play an important role in inappropriate weight gain...
September 1, 2016: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/27398228/the-evolving-role-of-bariatric-surgery-in-patients-with-type-1-diabetes-and-obesity
#15
Ali A Rizvi
Bariatric surgery has emerged as a viable treatment option in morbidly obese individuals with type 2 diabetes. Concomitant with societal lifestyle changes and the increased emphasis on achieving metabolic targets, there has been a rise in the number of patients with type 1 diabetes (T1DM) who are overweight and obese. Preliminary experience based on a limited number of observational reports points to substantial weight loss and amelioration of comorbid conditions such as blood pressure and dyslipidemia in patients with T1DM who undergo weight loss surgery...
2016: Integrative Obesity and Diabetes
https://www.readbyqxmd.com/read/27327770/post-bariatric-surgery-changes-in-quinolinic-and-xanthurenic-acid-concentrations-are-associated-with-glucose-homeostasis
#16
Marie Favennec, Benjamin Hennart, Marie Verbanck, Marie Pigeyre, Robert Caiazzo, Violeta Raverdy, Hélène Verkindt, Audrey Leloire, Gilles J Guillemin, Loïc Yengo, Delphine Allorge, Philippe Froguel, François Pattou, Odile Poulain-Godefroy
BACKGROUND: An increase of plasma kynurenine concentrations, potentially bioactive metabolites of tryptophan, was found in subjects with obesity, resulting from low-grade inflammation of the white adipose tissue. Bariatric surgery decreases low-grade inflammation associated with obesity and improves glucose control. OBJECTIVE: Our goal was to determine the concentrations of all kynurenine metabolites after bariatric surgery and whether they were correlated with glucose control improvement...
2016: PloS One
https://www.readbyqxmd.com/read/27213116/a-large-animal-survival-model-to-evaluate-bariatric-surgery-mechanisms
#17
Vlad V Simianu, Jonathan G Sham, Andrew S Wright, Skye D Stewart, Mouhamad Alloosh, Michael Sturek, David E Cummings, David R Flum
BACKGROUND: The impact of Roux-en-Y gastric bypass (RYGB) on type 2 diabetes mellitus is thought to result from upper and/or lower gut hormone alterations. Evidence supporting these mechanisms is incomplete, in part because of limitations in relevant bariatric-surgery animal models, specifically the lack of naturally insulin-resistant large animals. With overfeeding, Ossabaw swine develop a robust metabolic syndrome, and may be suitable for studying post-surgical physiology. Whether bariatric surgery is feasible in these animals with acceptable survival is unknown...
August 2015: Surgical Science
https://www.readbyqxmd.com/read/27120933/-not-available
#18
REVIEW
A-C Magain, T Richard, B De Becker, S Rorive, A Benahmed, M Vanhaeverbeek
In Belgium and around the world, the weight-control surgery has grown significantly since the beginning of the 21st century. The principal argument in favour of this type of surgery is the expected reduction of the obesity-associated morbidities. However, the expectatif reduction of mortality associated with this kind of surgery is based on a low level of evidence. Besides the mechanical complications, there are a number of health-related problems associated with the post-operative metabolic changes. Authors of the present article have observed four cases presenting with serious affections consecutive to bariatric interventions and reviewed the literature...
January 2016: Revue Médicale de Bruxelles
https://www.readbyqxmd.com/read/26922185/stability-of-metabolic-factor-before-and-after-bariatric-surgery
#19
Brandon Davis, Joseph Indelicato
BACKGROUND: A new metric called metabolic factor (resting metabolic rate/weight) has previously been established that can differentiate between people who are obese, overweight, and of normal weight. Previous studies were re-analyzed and found that people who lost weight did not experience a change in their metabolic factor. MATERIALS AND METHODS: The current study measured the metabolic factor of 18 individuals before and after bariatric surgery. RESULTS: As expected, individuals lost nearly 100 lb and therefore lowered their resting metabolic rate from 2614...
October 2016: Obesity Surgery
https://www.readbyqxmd.com/read/26902533/the-effect-of-laparoscopic-sleeve-gastrectomy-lsg-on-glycemic-control-in-morbidly-obese-patients
#20
Amit Gaur, C S Naidu, P P Rao, Sanjay Sharma, A K Singh, V Trehan, S V Kulkarni, Nishant Pathak, Amit Singh, Balram Goyal
INTRODUCTION: Bariatric procedures have become popular in treating not only the morbid obesity but also the metabolic derangements. Sleeve Gastrectomy has recently become popular as a standalone procedure and its usefulness as a metabolic procedure especially glycemic control is still under investigation. One of the most commonly used measure of insulin resistance is statistically derived 'Homeostatic model assessment of insulin resistance (HOMA-IR). AIM: The effect of Laparoscopic Sleeve Gastrectomy (LSG) on clinical and measurable change in glycemic control as seen by reduction of insulin resistance ie HOMA-IR levels in morbidly obese patients...
April 2016: International Journal of Surgery
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