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09 October 2018 : Animal Research

Improvement of Glucose Metabolism Following Long-Term Taurocholic Acid Gavage in a Diabetic Rat Model

Zhiqiang Cheng1ABCEF, Guozhi Liu2BCD, Xiang Zhang1ABEF, Dongsong Bi1EF, Sanyuan Hu1ADEFG*

DOI: 10.12659/MSM.912429

Med Sci Monit 2018; 24: ANS7206-7212

Abstract

BACKGROUND: Bile acids (BAs) are signaling molecules that participate in maintaining glucose homeostasis. Acute enteral infusion of BAs potently reduces the glycemic response to glucose, associated with an increase of incretin hormones. However, the effect of long-term supplementation of BAs on glucose metabolism has not been fully investigated.

MATERIAL AND METHODS: Thirty diabetic rats were assigned to a control group (n=10), a low TCA group (L-TCA group, n=10), and a high TCA group (H-TCA group, n=10). Rats in the control group were fed a regular high-fat diet (HFD), while rats in the L-TCA group and H-TCA group were fed a TCA (taurocholic acid)-mixed HFD with the concentrations of 0.05% and 0.3%, respectively, to control the intake of HFD and TCA. Energy intake, body weight, serum insulin, glucose tolerance, insulin sensitivity, GLP-1, and total serum BAs were measured at week 2 and week 12.

RESULTS: At week 2 there were no significant differences in body weight, daily energy intake, glucose tolerance, serum insulin, insulin sensitivity, GLP-1, or fasting total serum BAs between the 3 groups. At week 12, fasting blood glucose and intragastric glucose tolerance were better in the H-TCA group, with significantly greater insulin and GLP-1 secretion and better insulin sensitivity; no significant differences in body weight, energy intake, or total fasting serum BAs were observed.

CONCLUSIONS: Long-term supplementation with small doses of TCA was demonstrated to improve glucose metabolism in a diabetic rat model and may be a potential target for diabetes control.

Keywords: Diabetes Mellitus, Type 2, Rats, Taurocholic Acid

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750