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Here, to investigate strategies that alleviate mitochondrial dysfunction, we first generate a ubiquitous and tamoxifen-inducible knockout mouse model of mitochondrial transcription factor A (TFAM), a nuclear-encoded protein involved in mitochondrial DNA (mtDNA) maintenance \u2014\n                    <jats:italic>Tfam<\/jats:italic>\n                    <jats:sup>fl\/fl<\/jats:sup>\n                    <jats:italic>Ubc<\/jats:italic>\n                    <jats:sup>Cre-ERT2<\/jats:sup>\n                    (iTfamKO) mice. Systemic TFAM deficiency triggers mitochondrial decline in a myriad of tissues in adult mice. Consequently, iTfamKO mice manifest multiorgan dysfunction including lipodystrophy, sarcopenia, metabolic alterations, kidney failure, neurodegeneration, and locomotor dysregulation, which result in the premature death of these mice. Interestingly, iTfamKO mice display intestinal barrier disruption and gut dysbiosis, with diminished levels of microbiota-derived short-chain\u00a0fatty acids (SCFAs), such as butyrate. Mice with a deficient proof-reading version of the mtDNA polymerase gamma (mtDNA-mutator mice) phenocopy the dysfunction of the intestinal barrier and bacterial dysbiosis with reduced levels of butyrate, suggesting that different mouse models of mitochondrial dysfunction share insufficient generation of butyrate. Transfer of microbiota from healthy control mice or administration of tributyrin, a butyrate precursor, delay multiple signs of multimorbidity, extending lifespan in iTfamKO mice. Mechanistically, butyrate supplementation recovers epigenetic histone acylation marks that are lost in the intestine of\n                    <jats:italic>Tfam<\/jats:italic>\n                    deficient mice. Overall, our findings highlight the relevance of preserving host-microbiota symbiosis in disorders related to mitochondrial dysfunction.\n                  <\/jats:p>","DOI":"10.1038\/s41467-026-70547-4","type":"journal-article","created":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T12:24:24Z","timestamp":1773404664000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Butyrate extends health and lifespan in mice with mitochondrial deficiency"],"prefix":"10.1038","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9715-8714","authenticated-orcid":false,"given":"Enrique","family":"Gaband\u00e9-Rodr\u00edguez","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7447-694X","authenticated-orcid":false,"given":"Manuel M.","family":"G\u00f3mez de las 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