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ABSTRACT: Objective
The extent to which weight loss contributes to increases in insulin sensitivity (IS) and β-cell function after surgical or medical intervention has not been directly compared in individuals with impaired glucose tolerance or newly diagnosed type 2 diabetes.Methods
The Restoring Insulin Secretion (RISE) Study included adults in the Beta-Cell Restoration Through Fat Mitigation Study (n = 88 randomized to laparoscopic gastric banding or metformin [MET]) and the Adult Medication Study (n = 267 randomized to placebo, MET, insulin glargine/MET, or liraglutide + MET [L + M]). IS and β-cell responses were measured at baseline and after 12 months by modeling of oral glucose tolerance tests and during arginine-stimulated hyperglycemic clamps. Linear regression models assessed differences between and within treatments over time.Results
BMI decreased in all treatment groups, except placebo, at 12 months. IS increased in all arms except placebo and was inversely correlated with changes in BMI. L + M was the only treatment arm that enhanced multiple measures of β-cell function independent of weight loss. Insulin secretion decreased in the laparoscopic gastric banding arm proportional to increases in IS, with no net benefit on β-cell function.Conclusions
Reducing demand on the β-cell by improving IS through weight loss does not reverse β-cell dysfunction. L + M was the only treatment that enhanced β-cell function.
SUBMITTER: Utzschneider KM
PROVIDER: S-EPMC10849844 | biostudies-literature | 2022 Aug
REPOSITORIES: biostudies-literature
Utzschneider Kristina M KM Ehrmann David A DA Arslanian Silva A SA Barengolts Elena E Buchanan Thomas A TA Caprio Sonia S Edelstein Sharon L SL Hannon Tamara S TS Kahn Steven E SE Kozedub Alexandra A Mather Kieren J KJ Nadeau Kristen J KJ Sam Susan S Tripputi Mark M Xiang Anny H AH El Ghormli Laure L
Obesity (Silver Spring, Md.) 20220801 8
<h4>Objective</h4>The extent to which weight loss contributes to increases in insulin sensitivity (IS) and β-cell function after surgical or medical intervention has not been directly compared in individuals with impaired glucose tolerance or newly diagnosed type 2 diabetes.<h4>Methods</h4>The Restoring Insulin Secretion (RISE) Study included adults in the Beta-Cell Restoration Through Fat Mitigation Study (n = 88 randomized to laparoscopic gastric banding or metformin [MET]) and the Adult Medic ...[more]