{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,21]],"date-time":"2026-07-21T15:19:18Z","timestamp":1784647158989,"version":"3.55.0"},"reference-count":40,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2026,1,25]],"date-time":"2026-01-25T00:00:00Z","timestamp":1769299200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100007129","name":"Natural Science Foundation of Shandong Province","doi-asserted-by":"crossref","award":["ZR2023MC164"],"award-info":[{"award-number":["ZR2023MC164"]}],"id":[{"id":"10.13039\/501100007129","id-type":"DOI","asserted-by":"crossref"}]},{"name":"the Youth Innovation Team Project Program of Shandong Provincial Education Department","award":["2022KJ137"],"award-info":[{"award-number":["2022KJ137"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Veterinary Sciences"],"abstract":"<jats:p>This study investigates whether fecal microbiota transplantation (FMT) can alleviate gut microbiota dysbiosis induced by a high-fat diet (HFD) through modulation of fatty acid metabolism, competition for nutrients, production of short-chain fatty acids (SCFAs), and restoration of mucus layer integrity. To elucidate the mechanisms by which FMT regulates colonic microbial function and host metabolic responses, 80 male Bal b\/c mice were randomly assigned to four experimental groups (n = 20 per group): Normal Diet Group (NDG), High-Fat Diet Group (HDG), Restrictive Diet Group (RDG), and HDG recipients of NDG-derived fecal microbiota (FMT group). The intervention lasted for 12 weeks, during which body weight was monitored biweekly. At the end of the experiment, tissue and fecal samples were collected to assess digestive enzyme activities, intestinal histomorphology, gene expression related to gut barrier function, and gut microbiota composition via 16S rRNA gene sequencing. Results showed that mice in the HDG exhibited significantly higher final body weight and greater weight gain compared to those in the NDG and RDG (p &lt; 0.05). Notably, FMT treatment markedly attenuated HFD-induced weight gain (p &lt; 0.05), reducing it to levels comparable with the NDG (p &gt; 0.05). While HFD significantly elevated the activities of \u03b1-amylase and trypsin (p &lt; 0.05), FMT supplementation effectively suppressed these enzymatic activities (p &lt; 0.05). Moreover, FMT ameliorated HFD-induced intestinal architectural damage, as evidenced by significant increases in villus height and the villus height-to-crypt depth ratio (V\/C) (p &lt; 0.05). At the molecular level, FMT significantly downregulated the expression of pro-inflammatory cytokines (IL-1\u03b2, IL-1\u03b1, TNF-\u03b1) and upregulated key tight junction proteins (Occludin, Claudin-1, ZO-1) and mucin-2 (MUC2) relative to the HDG (p &lt; 0.05). 16S rRNA analysis demonstrated that FMT substantially increased the abundance of beneficial genera such as Lactobacillus and Bifidobacterium while reducing opportunistic pathogens including Romboutsia (p &lt; 0.05). Furthermore, alpha diversity indices (Chao1 and ACE) were significantly higher in the FMT group than in all other groups (p &lt; 0.05), indicating enhanced microbial richness and community stability. Functional prediction using PICRUSt2 revealed that FMT-enriched metabolic pathways (particularly those associated with SCFA production) and enhanced gut barrier-related functions. Collectively, this study deepens our understanding of host\u2013microbe interactions under HFD-induced metabolic stress and provides mechanistic insights into how FMT restores gut homeostasis, highlighting its potential as a therapeutic strategy for diet-induced dysbiosis and associated metabolic disorders.<\/jats:p>","DOI":"10.3390\/vetsci13020116","type":"journal-article","created":{"date-parts":[[2026,1,26]],"date-time":"2026-01-26T08:14:23Z","timestamp":1769415263000},"page":"116","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Study of Fecal Microbiota Transplantation Ameliorates Colon Morphology and Microbiota Function in High-Fat Diet Mice"],"prefix":"10.3390","volume":"13","author":[{"given":"Xinyu","family":"Cao","sequence":"first","affiliation":[{"name":"School of Life Sciences, Qilu Normal University, Jinan 250200, China"},{"name":"College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lu","family":"Zhou","sequence":"additional","affiliation":[{"name":"School of Life Sciences, Qilu Normal University, Jinan 250200, China"},{"name":"College of Life and Geographic Sciences, Key Laboratory of Biological Resources and Ecology of Pamirs Plateauin Xinjiang Uygur Autonomous Region, Kashi University, Kashi 844000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuxia","family":"Ding","sequence":"additional","affiliation":[{"name":"College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chaofan","family":"Ma","sequence":"additional","affiliation":[{"name":"Institute of Western Agriculture, The Chinese Academy of Agricultural Sciences, Changji 831100, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qian","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Life Sciences, Qilu Normal University, Jinan 250200, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ning","family":"Li","sequence":"additional","affiliation":[{"name":"Institute of Western Agriculture, The Chinese Academy of Agricultural Sciences, Changji 831100, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hao","family":"Ren","sequence":"additional","affiliation":[{"name":"College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ping","family":"Yan","sequence":"additional","affiliation":[{"name":"Institute of Western Agriculture, The Chinese Academy of Agricultural Sciences, Changji 831100, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5843-1709","authenticated-orcid":false,"given":"Jianlei","family":"Jia","sequence":"additional","affiliation":[{"name":"School of Life Sciences, Qilu Normal University, Jinan 250200, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,1,25]]},"reference":[{"key":"ref_1","first-page":"1000001","article-title":"Gut microbiota ecology role in animal nutrition health performance","volume":"6","author":"Negash","year":"2022","journal-title":"J. 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