Effects of casein, chicken, and pork proteins on the regulation of body fat and blood inflammatory factors and metabolite patterns are largely dependent on the protein level and less attributable to the protein source

Shangxin Song, Tianlan Xia, Changqing Zhu, Jingqi Xue, Qingquan Fu, Chun Hua, Guido J. E. J. Hooiveld, Michael Müller, Chunbao Li

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The impact of meat protein on metabolic regulation is still disputed and may be influenced by protein level. This study aimed to explore the effects of casein, pork, and chicken proteins at different protein levels (40% E vs 20% E) on body weight regulation, body fat accumulation, serum hormone levels, and inflammatory factors/metabolites in rats maintained on high-fat (45% E fat) diets for 84 d. Increased protein levels resulted in a significant reduction in body fat mass and an increase in the serum levels of the anti-inflammatory cytokine IL-10, independent of protein source. Analysis of blood via untargeted metabolomics analysis identified eight, four, and four metabolites significantly altered by protein level, protein source, and a protein level-source interaction, respectively. Together, the effects of casein, chicken, and pork protein on the regulation of body fat accumulation and blood metabolite profile are largely dependent on protein level and less attributable to the protein source.

Original languageEnglish
Pages (from-to)9398-9407
Number of pages10
JournalJournal of Agricultural and Food Chemistry
Issue number35
Early online date14 Aug 2020
Publication statusPublished - 2 Sep 2020

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