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Fasting plasma chenodeoxycholic acid and cholic acid concentrations are inversely correlated with insulin sensitivity in adults.

Abstract : ABSTRACT: BACKGROUND: Accumulating data suggest a novel role for bile acids (BAs) in modulating metabolic homeostasis. BA treatment has been shown to improve glucose tolerance and to increase energy expenditure in mice. Here, we investigated the relationship between fasting plasma BAs concentrations and metabolic parameters in humans. FINDINGS: Fasting plasma glucose, insulin and lipid profile were measured in 14 healthy volunteers, 20 patients with type 2 diabetes (T2D), and 22 non-diabetic abdominally obese subjects. Insulin sensitivity was also assessed by the determination of the glucose infusion rate (GIR) during a hyperinsulinemic-euglycemic clamp in a subgroup of patients (9 healthy and 16 T2D subjects). Energy expenditure was measured by indirect calorimetry. Plasma cholic acid (CA), chenodeoxycholic acid (CDCA) and deoxycholic acid (DCA) concentrations were analyzed by gas chromatograph-mass spectrometry. In univariable analysis, a positive association was found between HOMA-IR and plasma CDCA (beta=0.09, p=0.001), CA (beta=0.03, p=0.09) and DCA concentrations (beta=0.07, p<0.0001). Spearman analysis retrieved an inverse relationship between plasma CDCA (r=-0.44, p=0.03), CA (r=-0.65, p=0.001) and the GIR. HOMA-IR remained positively associated with CDCA (beta=0.11, p=0.01), CA (beta=0.04, p=0.01) and DCA (beta=0.06, p=0.007) in multivariable analysis, after adjustment for age, gender, BMI, HbA1C and plasma lipid parameters. In contrast, HbA1c, energy expenditure and plasma lipid concentrations were not correlated with plasma BAs levels in multivariable analysis. CONCLUSIONS: Both plasma CDCA, CA and DCA concentrations were negatively associated with insulin sensitivity in a wide range of subjects.
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Submitted on : Tuesday, July 26, 2011 - 1:01:22 PM
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Bertrand Cariou, Maud Chetiveaux, yassine Zaïr, Etienne Pouteau, Emmanuel Disse, et al.. Fasting plasma chenodeoxycholic acid and cholic acid concentrations are inversely correlated with insulin sensitivity in adults.. Nutrition and Metabolism, BioMed Central, 2011, 8 (1), pp.48. ⟨10.1186/1743-7075-8-48⟩. ⟨inserm-00611430⟩



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