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Research article - Peer-reviewed, 2020

High-Meat-Protein High-Fat Diet Induced Dysbiosis of Gut Microbiota and Tryptophan Metabolism in Wistar Rats

Shi, Jie; Zhao, Di; Song, Shangxin; Zhang, Miao; Zamaratskaia, Galia; Xu, Xing-Lian; Zhou, Guanghong; Li, Chunbao


Meat-diet-induced changes in gut microbiota are often accompanied with the development of various metabolic and inflammatory disorders. The exact biochemical mechanism underlying these effects is not well elucidated. This study aims to evaluate how meat proteins in high-fat diets affect tryptophan metabolism in rats. The high-chicken-protein (HFHCH) or high-pork-protein (HFHP) diets increased levels of skatole and indole in cecal and colonic contents, feces, and subcutaneous adipose tissue. The HFHCH and HFHP diets also increased the abundance of Lactobacillus, the Family XIII AD3011 group, and Desulfovibrio in the cecum and colon, which may be involved in the production of skatole and indole. Additionally, high-meat-protein diets induced lower activity of skatole- and indole-metabolizing enzyme CYP2E1 in liver compared with low-meat-protein diets. This work highlights the negative impact of high meat proteins on physiological responses by inducing dysbiosis of gut microbiota and tryptophan metabolism.


meat proteins; gut microbiota; tryptophan metabolism; skatole; indole; CYP2E1; CYP1A2

Published in

Journal of Agricultural and Food Chemistry
2020, Volume: 68, number: 23, pages: 6333-6346

    UKÄ Subject classification

    Nutrition and Dietetics
    Food Science

    Publication identifier


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