@article{3077567,
    title = "Circulating levels of gastrointestinal hormones in response to the most common types of bariatric surgery and predictive value for weight loss over one year: Evidence from two independent trials",
    author = "Perakakis, N. and Kokkinos, A. and Peradze, N. and Tentolouris, N. and Ghaly, W. and Pilitsi, E. and Upadhyay, J. and Alexandrou, A. and Mantzoros, C.S.",
    journal = "Metabolism: Clinical and Experimental",
    year = "2019",
    volume = "101",
    publisher = "W.B. Saunders",
    issn = "0026-0495",
    doi = "10.1016/j.metabol.2019.153997",
    keywords = "gastric inhibitory polypeptide;  gastrointestinal hormone;  ghrelin;  glicentin;  glucagon;  glucagon like peptide 1;  glucagon like peptide 2;  major proglucagon fragment;  oxyntomodulin;  peptide YY;  unclassified drug;  gastrointestinal hormone;  glicentin;  oxyntomodulin, Article;  bariatric surgery;  body weight change;  body weight loss;  clinical article;  fasting;  gastric banding;  hormone determination;  human;  morbid obesity;  obese patient;  pilot study;  predictive value;  priority journal;  protein processing;  Roux-en-Y gastric bypass;  satiety;  sleeve gastrectomy;  test meal;  treatment response;  vertical sleeve gastrectomy;  adult;  bariatric surgery;  blood;  clinical trial;  female;  male;  middle aged;  obesity;  postprandial state;  predictive value;  procedures;  prognosis, Adult;  Bariatric Surgery;  Female;  Gastrointestinal Hormones;  Glicentin;  Humans;  Male;  Middle Aged;  Obesity;  Oxyntomodulin;  Postprandial Period;  Predictive Value of Tests;  Prognosis;  Weight Loss",
    abstract = "Aims: Bariatric surgery leads to profound and sustainable weight loss. Gastrointestinal hormones are involved in energy and glucose homeostasis, thus postoperative changes of their circulating levels may be mediating future weight loss. To investigate how the circulating concentrations of gastrointestinal hormones change in response to the most common types of bariatric operation and whether these changes can predict future weight loss. Materials and Methods: We measured circulating GLP-1, GLP-2, oxyntomodulin, glicentin, glucagon, major proglucagon fragment (MPGF), ghrelin, GIP, PYY after overnight fasting and/or after a mixed meal test (MMT) in: a) 14 subjects that have undergone either an adjustable gastric banding [AGB] (n = 9) or a Roux-en-Y bypass (RYGB) (n = 5) (Pilot study 1), b) 28 subjects that have undergone either a vertical sleeve gastrectomy (n = 17) or a RYGB (n = 11) before and three, six and twelve months after surgery. Results: In addition to the expected associations with GLP-1, the most robust increases were observed in postprandial levels of oxyntomodulin and glicentin three months after VSG or RYGB (but not after AGB) and are associated with degree of weight loss. Oxyntomodulin and glicentin levels at the third and sixth month postoperative visit are positively associated with feeling of satiety which may be underlying the observed associations with future weight loss. Conclusion: Beyond GLP-1, early postprandial changes in circulating oxyntomodulin and glicentin are predictors of weight loss after bariatric surgery, possibly through regulation of satiety. Further studies should focus on underlying mechanisms, and their potential as attractive therapeutic tools against obesity and related comorbidities. © 2019 Elsevier Inc."
}