PMID- 37505920 OWN - NLM STAT- MEDLINE DCOM- 20231102 LR - 20231107 IS - 1949-0984 (Electronic) IS - 1949-0976 (Print) IS - 1949-0976 (Linking) VI - 15 IP - 1 DP - 2023 Jan-Dec TI - Protection against Metabolic Associated Fatty Liver Disease by Protocatechuic Acid. PG - 2238959 LID - 10.1080/19490976.2023.2238959 [doi] LID - 2238959 AB - Gut microbiota-diet interaction has been identified as a key factor of metabolic associated fatty liver disease (MAFLD). Recent studies suggested that dietary polyphenols may protect against MAFLD by regulating gut microbiota; however, the underlying mechanisms remain elusive. We first investigated the effects of cyanidin 3-glucoside and its phenolic metabolites on high-fat diet induced MAFLD in C57BL/6J mice, and protocatechuic acid (PCA) showed a significant positive effect. Next, regulation of PCA on lipid metabolism and gut microbiota were explored by MAFLD mouse model and fecal microbiota transplantation (FMT) experiment. Dietary PCA reduced intraperitoneal and hepatic fat deposition with lower levels of transaminases (AST & ALT) and inflammatory cytokines (IL-1beta, IL-2, IL-6, TNF-alpha & MCP-1), but higher HDL-c/LDL-c ratio. Characterization of gut microbiota indicated that PCA decreased the Firmicutes/Bacteroidetes ratio mainly by reducing the relative abundance of genus Enterococcus, which was positively correlated with the levels of LDL-c, AST, ALT and most of the up-regulated hepatic lipids by lipidomics analysis. FMT experiments showed that Enterococcus faecalis caused hepatic inflammation, fat deposition and insulin resistance with decreased expression of carnitine palmitoyltransferase-1 alpha (CPT1alpha), which can be reversed by PCA through inhibiting Enterococcus faecalis. Transcriptomics analysis suggested that Enterococcus faecalis caused a significant decrease in the expression of fibroblast growth factor 1 (Fgf1), and PCA recovered the expression of Fgf1 with insulin-like growth factor binding protein 2 (Igfbp2), insulin receptor substrate 1 (Irs1) and insulin receptor substrate 2 (Irs2). These results demonstrated that high proportion of gut Enterococcus faecalis accelerates MAFLD with decreased expression of CPT1alpha and Fgf1, which can be prevented by dietary supplementation of PCA. FAU - Tan, Jijun AU - Tan J AD - Hunan Collaborative Innovation Center for Utilization of Botanical Functional Ingredients, College of Animal Science and Technology, Hunan Agricultural University, Changsha, China. FAU - Hu, Ruizhi AU - Hu R AD - Hunan Collaborative Innovation Center for Utilization of Botanical Functional Ingredients, College of Animal Science and Technology, Hunan Agricultural University, Changsha, China. FAU - Gong, Jiatai AU - Gong J AD - Hunan Collaborative Innovation Center for Utilization of Botanical Functional Ingredients, College of Animal Science and Technology, Hunan Agricultural University, Changsha, China. FAU - Fang, Chengkun AU - Fang C AD - Hunan Collaborative Innovation Center for Utilization of Botanical Functional Ingredients, College of Animal Science and Technology, Hunan Agricultural University, Changsha, China. FAU - Li, Yanli AU - Li Y AD - Hunan Collaborative Innovation Center for Utilization of Botanical Functional Ingredients, College of Animal Science and Technology, Hunan Agricultural University, Changsha, China. FAU - Liu, Ming AU - Liu M AD - Animal Science and Technology College, Beijing University of Agriculture, Beijing, P. R China. FAU - He, Ziyu AU - He Z AD - The United Graduate School of Agricultural Sciences, Faculty of Agriculture, Kagoshima University, Kagoshima, Japan. FAU - Hou, De-Xing AU - Hou DX AD - The United Graduate School of Agricultural Sciences, Faculty of Agriculture, Kagoshima University, Kagoshima, Japan. FAU - Zhang, Hongfu AU - Zhang H AD - State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China. FAU - He, Jianhua AU - He J AD - Hunan Collaborative Innovation Center for Utilization of Botanical Functional Ingredients, College of Animal Science and Technology, Hunan Agricultural University, Changsha, China. FAU - Wu, Shusong AU - Wu S AUID- ORCID: 0000-0003-3532-1165 AD - Hunan Collaborative Innovation Center for Utilization of Botanical Functional Ingredients, College of Animal Science and Technology, Hunan Agricultural University, Changsha, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Gut Microbes JT - Gut microbes JID - 101495343 RN - 36R5QJ8L4B (protocatechuic acid) RN - 0 (Cholesterol, LDL) RN - 104781-85-3 (Fibroblast Growth Factor 1) SB - IM MH - Mice MH - Animals MH - Cholesterol, LDL MH - Fibroblast Growth Factor 1/metabolism/pharmacology MH - *Gastrointestinal Microbiome MH - Mice, Inbred C57BL MH - *Non-alcoholic Fatty Liver Disease/etiology MH - Liver/metabolism MH - Diet, High-Fat/adverse effects PMC - PMC10392757 OTO - NOTNLM OT - Enterococcus faecalis OT - gut microbiota OT - insulin OT - nonalcoholic fatty liver disease OT - protocatechuic acid COIS- No potential conflict of interest was reported by the author(s). EDAT- 2023/07/28 19:11 MHDA- 2023/07/28 19:12 PMCR- 2023/07/28 CRDT- 2023/07/28 12:13 PHST- 2023/07/28 19:12 [medline] PHST- 2023/07/28 19:11 [pubmed] PHST- 2023/07/28 12:13 [entrez] PHST- 2023/07/28 00:00 [pmc-release] AID - 2238959 [pii] AID - 10.1080/19490976.2023.2238959 [doi] PST - ppublish SO - Gut Microbes. 2023 Jan-Dec;15(1):2238959. doi: 10.1080/19490976.2023.2238959.