Cited by 133Bariatric Surgery and OutcomesRegulation of Appetite and ObesityEating Disorders and Behaviors

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Roux-en-Y gastric bypass surgery changes food reward in rats

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Shin, A C, Zheng, H, Pistell, P J, Berthoud, H-R·2011·International Journal of Obesity

DOI 10.1038/ijo.2010.174PMC PMC2997148

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Abstract

Context Roux-en-Y gastric bypass surgery (RYGB) is currently the most effective treatment for morbid obesity, and clinical studies suggest that RYGB patients change food preferences and the desire to eat.Objective To examine hedonic reactions to palatable foods and food choice behavior in an established rat model of RYGB.Methods and design Male Sprague-Dawley (SD) rats and selected line obesity-prone rats that were rendered obese on a high-fat diet underwent RYGB or sham surgery and were tested for 'liking' and 'wanting' of palatable foods at different caloric densities 4-6 months after surgery.Results Compared with sham-operated (obese) and age-matched lean control rats, RYGB rats of both models exhibited more positive orofacial responses to low concentrations of sucrose but fewer to high concentrations. These changes in 'liking' by RYGB rats were translated into a shift of the concentration-response curve in the brief access test, with more vigorous licking of low concentrations of sucrose and corn oil, but less licking of the highest concentrations. The changes in hedonic evaluation also resulted in lower long-term preference/acceptance of high-fat diets compared with sham-operated (obese) rats. Furthermore, the reduced 'wanting' of a palatable reward in the incentive runway seen in sham-operated obese SD rats was fully restored after RYGB to the level found in lean control rats.Conclusions The results suggest that RYGB leads to a shift in hedonic evaluation, favoring low over high calorie foods and restores obesity-induced alterations in 'liking' and 'wanting'. It remains to be determined whether these effects are simply due to weight loss or specific changes in gut-brain communication. Given the emerging evidence for modulation of cortico-limbic brain structures involved in reward mechanisms by gut hormones, RYGB-induced changes in the secretion of these hormones could potentially be mediating these effects.

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Authors: Shin, A. C., Zheng, H., Pistell, P. J., & Berthoud, H.-R.
Affiliations: Pennington Biomedical Research Center (US)
Corresponding author: Berthoud, H-R
ORCID: Shin, A C
Zheng, H
Venue: International Journal of Obesity
Publisher: Springer Science and Business Media LLC
Published: 2010-08-31
Volume: 35
Issue: 5
Pages: 642-651
ISSN: 0307-0565 (ISSN-L)
1476-5497
DOI: 10.1038/ijo.2010.174
PMC: PMC2997148
OpenAlex: W2040476968
Cited by: 133
References: 60
Citations by year: 2024: 2 · 2023: 2 · 2022: 8 · 2021: 8 · 2020: 3 · 2019: 8 · 2018: 9 · 2017: 13 · 2016: 12 · 2015: 14 · 2014: 12 · 2013: 14 · 2012: 18
FWCI: 14.17
Type: journal article
Language: en
Open access: green
www.ncbi.nlm.nih.gov
Licence: www.springer.com/tdm (tdm)
Locations: International Journal of Obesity (publishedVersion)
PubMed (publishedVersion)
PubMed Central (acceptedVersion)
Funders: National Institutes of Health
National Institute of Diabetes and Digestive and Kidney Diseases (R01DK071082, R01DK047348, P30DK072476)
Topics: Health Sciences › Medicine › Surgery › Bariatric Surgery and Outcomes
Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Social Sciences › Psychology › Clinical Psychology › Eating Disorders and Behaviors
Keywords: Roux-en-Y gastric bypass, food reward, food liking, desire to eat, food choice, obesity, high-fat diet, sucrose, gut-brain signaling, gastrointestinal hormones, bariatric surgery
MeSH terms: Animals, Body Weight, Food Preferences, Male, Obesity, Morbid, Reward, Gastric Bypass, Weight Loss, Rats, Sprague-Dawley, Rats

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Roux-en-Y gastric bypass surgery changes food reward in rats

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