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Oil tea improves glucose and lipid levels and alters gut microbiota in type 2 diabetic mice

Citation

Lin, R and He, X and Chen, H and He, Q and Yao, Z and Li, Y and Yang, H and Simpson Jr, S, Oil tea improves glucose and lipid levels and alters gut microbiota in type 2 diabetic mice, Nutrition Research, 57 pp. 67-77. ISSN 0271-5317 (2018) [Refereed Article]

Copyright Statement

Copyright 2018 Elsevier Inc.

DOI: doi:10.1016/j.nutres.2018.05.004

Abstract

Oil tea has traditionally been used in minority populations in China for treating various ailments in traditional Chinese medicine. Individually, green tea and ginger, which are the main ingredients of oil tea, have demonstrated antidiabetic effects; however, whether oil tea exerts antidiabetic effects remains unknown. In addition, aberrant gut microbiota structure is associated with diabetic status, and research indicates that there may be beneficial effects of tea on gut microbiota. Therefore, we hypothesized that oil tea exerts antidiabetic effects and induces alteration in gut microbiota. To test our hypothesis, we first examined the nutrition composition of oil tea. Then, db/db mice were randomly divided into 3 groups and orally gavaged with saline, metformin, and oil tea for 8 weeks. Fasting blood glucose (FBG), oral glucose tolerance test (OGTT), and lipid levels were tested during the experiment. 16S rRNA genes were sequenced and changes in gut microbiota in response pre/post treatment were examined. Our experiments showed that oil tea contains high concentrations of tea polyphenols (246.35 mg/100 g) and [6]-gingerol (2.98 mg/100 g). It appeared that oil tea treatment significantly suppressed the postprandial blood glucose elevation and lowered the levels of FBG, total cholesterol, triglycerides, and LDL-cholesterol (P <.05). The composition of gut microbiota changed significantly in response to oil tea treatment, Lachnospiraceae were significantly enriched (q < 0.05, LDA score> 3.5). Redundancy analysis identified 155 oil tea-modulating family level phylotypes, where Lachnospiraceae significantly correlated with FBG, total cholesterol, and LDL-cholesterol (P <.05). Our findings demonstrate that oil tea improved glucose and lipid levels and modulated gut microbiota in db/db mice.

Item Details

Item Type:Refereed Article
Keywords:glucose, gut microbiota, lipid, oil tea, Type 2 diabetes, db/db mice
Research Division:Medical and Health Sciences
Research Group:Nutrition and Dietetics
Research Field:Nutrition and Dietetics not elsewhere classified
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Diabetes
UTAS Author:Simpson Jr, S (Dr Steve Simpson JR)
ID Code:128158
Year Published:2018
Web of Science® Times Cited:6
Deposited By:Menzies Institute for Medical Research
Deposited On:2018-09-06
Last Modified:2019-03-04
Downloads:0

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