Pancreatic Steatosis Associates with Impaired Insulin Secretion in Genetically Predisposed Individuals

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Abstract

Context: Pancreatic steatosis leading to beta-cell failure might be involved in type 2 diabetes (T2D) pathogenesis. Objective: We hypothesized that the genetic background modulates the effect of pancreatic fat on beta-cell function and investigated genotype × pancreatic fat interactions on insulin secretion. Design: Two observational studies. Setting: University hospital. Patients or participants: A total of 360 nondiabetic individuals with elevated risk for T2D (Tuebingen Family Study [TUEF]), and 64 patients undergoing pancreatectomy (Pancreas Biobank [PB], HbA1c <9%, no insulin therapy). Main Outcome Measures: Insulin secretion calculated from 5-point oral glucose tolerance test (TUEF) and fasting blood collection before surgery (PB). A genome-wide polygenic score for T2D was computed from 484,788 genotyped variants. The interaction of magnetic resonance imaging-measured and histologically quantified pancreatic fat with the polygenic score was investigated. Partitioned risk scores using genome-wide significant variants were also computed to gain insight into potential mechanisms.

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Wagner, R., Jaghutriz, B. A., Gerst, F., Oquendo, M. B., Machann, J., Schick, F., … Heni, M. (2020). Pancreatic Steatosis Associates with Impaired Insulin Secretion in Genetically Predisposed Individuals. Journal of Clinical Endocrinology and Metabolism, 105(11). https://doi.org/10.1210/clinem/dgaa435

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