{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"institution":[{"name":"bioRxiv"}],"indexed":{"date-parts":[[2026,6,24]],"date-time":"2026-06-24T05:47:10Z","timestamp":1782280030239,"version":"3.54.5"},"posted":{"date-parts":[[2024,10,25]]},"group-title":"Molecular Biology","reference-count":91,"publisher":"openRxiv","license":[{"start":{"date-parts":[[2024,10,25]],"date-time":"2024-10-25T00:00:00Z","timestamp":1729814400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"accepted":{"date-parts":[[2024,10,25]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                <jats:p>\n                  Epidemiological evidence suggests an association between dioxin and dioxin-like compound (DLC) exposure and human liver disease. The prototypical DLC, 2,3,7,8-tetrachlorodibenzo-\n                  <jats:italic>p<\/jats:italic>\n                  -dioxin (TCDD), has been shown to induce the progression of reversible hepatic steatosis to steatohepatitis with periportal fibrosis and biliary hyperplasia in mice. Although the effects of TCDD toxicity are mediated by aryl hydrocarbon receptor (AHR) activation, the underlying mechanisms of TCDD-induced hepatotoxicity are unresolved. In the present study, male C57BL\/6NCrl mice were gavaged every 4 days for 28 days with 0.03 - 30 \u03bcg\/kg TCDD and evaluated for liver histopathology and gene expression as well as complementary 1-dimensional proton magnetic resonance (1D-\n                  <jats:sup>1<\/jats:sup>\n                  H NMR) urinary metabolic profiling. Urinary trimethylamine (TMA), trimethylamine\n                  <jats:italic>N<\/jats:italic>\n                  -oxide (TMAO), and 1-methylnicotinamide (1MN) levels were altered by TCDD at doses \u2264 3 \u03bcg\/kg; other urinary metabolites, like glycolate, urocanate, and 3-hydroxyisovalerate, were only altered at doses that induced moderate to severe steatohepatitis. Bulk liver RNA-seq data suggested altered urinary metabolites correlated with hepatic differential gene expression corresponding to specific metabolic pathways. In addition to evaluating whether altered urinary metabolites were liver-dependent, published single-nuclear RNA-seq (snRNA-seq), AHR ChIP-seq, and AHR knockout gene expression datasets provide further support for hepatic cell-type and AHR-regulated dependency, respectively. Overall, TCDD-induced liver effects were preceded by and occurred with changes in urinary metabolite levels due to AHR-mediated changes in hepatic gene expression.\n                <\/jats:p>","DOI":"10.1101\/2024.10.22.619714","type":"posted-content","created":{"date-parts":[[2024,10,25]],"date-time":"2024-10-25T15:40:11Z","timestamp":1729870811000},"source":"Crossref","is-referenced-by-count":1,"title":["2,3,7,8-Tetrachlorodibenzo-\n                  <i>p<\/i>\n                  -dioxin (TCDD) elicited dose-dependent shifts in the murine urinary metabolome associated with hepatic AHR-mediated differential gene expression"],"prefix":"10.64898","author":[{"given":"Warren 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