Abstract
Background
Alterations in gut hormone secretion and reported changes in taste preferences have been suggested to contribute to the weight-reducing effects of bariatric surgery. However, a link between changes in gut hormone secretion and taste preferences following bariatric surgery has yet to be elucidated.
Methods
Here we examined the potential relationships between gut hormone responses (GLP-1 and PYY3-36 peak, ghrelin trough) to a test meal of Ensure and liking ratings for taste mixtures varying in sugar and fat content before and following bariatric surgery (vertical sleeve gastrectomy (VSG): Nā=ā4; Roux-en Y gastric bypass (RYGB): Nā=ā8).
Results
Significant increases in GLP-1 and PYY3-36 peak and a significant drop in ghrelin trough were observed following surgery. Pre- and postoperation, patients with higher postprandial GLP-1 or PYY3-36 peaks gave lower liking ratings for mixtures containing a combination of fat and sugar (half and half + 20% added sugar) whereas, for the combined surgery analyses, no relationships were found with solutions comprised of high fat (half and half + 0% sugar), predominantly high sugar (skim milk + 20% added sugar), or low fat and low sugar (skim milk + 0% added sugar). Within the RYGB patients, patients with the greatest increase in postprandial GLP-1 peak from preoperation to postoperation also demonstrated the greatest decrease in liking for half & half + 20% added sugar and skim milk + 20% added sugar, but not the unsweetened version of each solution. No pre- or postoperative relationship between ghrelin and liking ratings were observed.
Conclusion
Gut hormone responses following bariatric surgery may contribute to taste processing of sugar+fat mixtures and together influence weight loss.
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Data availability
Data available on request to the corresponding author.
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Acknowledgements
This work was supported by funding to KES from the American Society for Metabolic and Bariatric Surgery and K23DK100559. Additionally, the NIH National Institute of Mental Health Neuroscience & Psychiatry T32 training program (T32MH015330) to support MMH and KRS. This work was also supported by R01DK019302 and a gift from Dalio Philanthropies to THM.
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SC, VK, THM, KES designed the experiments. KES, CH recruited and consented patients. KRS, CH, KES collected samples and conducted the experiments and study visits. KES, SC managed regulatory oversight. MMH, KRS, EJG analyzed the data. MMH and KRS wrote the manuscript with all authors contributing to and approving the final draft.
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Hurley, M.M., Smith, K.R., Harris, C. et al. Investigating relationships between post-prandial gut hormone responses and taste liking ratings prior to and following bariatric surgery: a pilot study. Int J Obes 46, 2114ā2119 (2022). https://doi.org/10.1038/s41366-022-01214-z
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DOI: https://doi.org/10.1038/s41366-022-01214-z