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However, its therapeutic potential and mechanisms of action in rheumatoid arthritis (RA) remain poorly understood. This study aimed to evaluate the anti\u2010RA efficacy of EDT and elucidate the molecular mechanisms underlying its effects. A collagen\u2010induced arthritis (CIA) rat model was established to assess the therapeutic efficacy of EDT. Single\u2010cell RNA sequencing (scRNA\u2010seq) was performed to identify the key cell clusters modulated by EDT. Consequently, EDT's effects on M1 macrophage polarization were assessed in\u00a0vitro. Molecular docking, cellular thermal shift assay (CETSA), and drug affinity responsive target stability (DARTS) assays were employed to identify the target of EDT. Neutralizing antibodies, gene silencing, and chromatin immunoprecipitation quantitative PCR (ChIP\u2010qPCR) were used to validate the downstream mechanisms. EDT significantly alleviated arthritis symptoms in CIA rats. ScRNA\u2010seq, in conjunction with bioinformatics analysis, identified M1 macrophages as the principal target cell of EDT and demonstrated a significant inhibition of their glycolytic activity and associated gene set. Further analysis indicated that EDT's inhibitory effect on HIF\u20101\u03b1\u2010driven glycolysis in M1 macrophages was associated with decreased Insulin\u2010like growth factor 1 (IGF1). More importantly, JMJD3, a histone demethylase, is a direct binding target of EDT. Silencing\n                    <jats:italic>Jmjd3<\/jats:italic>\n                    impaired EDT\u2010induced H3K27me3 enrichment and reversed its suppression of IGF1 transcription and M1 polarization. EDT effectively attenuates RA progression and inhibits M1 polarization of macrophages. Moreover, our results first identify the direct link between EDT and the histone demethylase JMJD3, which mediates the epigenetic silencing of IGF1 and inhibits HIF\u20101\u03b1\u2010driven glycolysis in M1 macrophages.\n                  <\/jats:p>","DOI":"10.1002\/ptr.70335","type":"journal-article","created":{"date-parts":[[2026,4,6]],"date-time":"2026-04-06T11:56:25Z","timestamp":1775476585000},"page":"3565-3579","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Eriodictyol Regulates Macrophage Polarization to Treat Rheumatoid Arthritis by Inhibiting Jumonji Domain\u2010Containing Protein\n                    <scp>D3<\/scp>\n                    \u2010Mediated Demethylation of Trimethylation of Lysine 27 on Histone\n                    <scp>H3<\/scp>\n                    : An Integrative Single Cell Sequencing and Experimental Validation 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