Abstract
OBJECTIVE: This study investigated (1) the effect of octreotide-LAR (Sandostatin-LAR®Depot; Novartis) on the enteroinsular axis in a biracial cohort of severely obese adults, (2) whether octreotide suppression of insulin secretion occurs by both a direct β-cell effect and through mediating a glucagon-like peptide 1 (GLP-1) response, and (3) whether differences in GLP-1 concentrations could explain racial differences in insulin concentrations.
DESIGN: Prospective, open-label trial using a pre–post test design.
SETTING: Single university, clinical research center.
SUBJECTS: In all, 42 healthy, severely obese Caucasian and African-American (AA) adults (93% female, 64% Caucasian, age=37.8±1.2 y, weight=123±4.2 kg, BMI=44.5±1 kg/m2), recruited through physician referral and newspaper ads, participated in the study.
INTERVENTIONS: Indices of β-cell activity, insulin and GLP-1 response before and during a 75-gm oral glucose tolerance test were determined before and after 24 weeks of octreotide-LAR.
RESULTS: AA exhibited higher β-cell activity, and insulin and GLP-1 concentrations than Caucasians. Octreotide-LAR suppressed the insulin and GLP-1 levels in both groups.
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Acknowledgements
Funding for this study was provided in part by Novartis Pharmaceuticals Corporation and the University of Tennessee Health Science Center General Clinical Resource Center (UTHSC GCRC) [USPH RR000211]. We would also like to thank the nurses in the UTHSC GCRC and the HELP Center for their assistance with the study. This work was supported in part by University of Tennessee GCRC 5M01RR 00211, and by a research grant from Novartis Pharmaceuticals Corporation.
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Velasquez-Mieyer, P., Umpierrez, G., Lustig, R. et al. Race affects insulin and GLP-1 secretion and response to a long-acting somatostatin analogue in obese adults. Int J Obes 28, 330–333 (2004). https://doi.org/10.1038/sj.ijo.0802561
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DOI: https://doi.org/10.1038/sj.ijo.0802561
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