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However, this pro-inflammatory state could also exacerbate chronic conditions like inflammatory bowel disease (IBD), which is characterized by persistent inflammation and microbial imbalance. It remains unclear how trained immunity influences IBD pathogenesis and whether it can be harnessed therapeutically. In our study, pretreatment with \u03b2-glucan reprogrammed bone marrow hematopoietic progenitors and peripheral monocytes, inducing a profound shift in monocyte plasticity and significantly reducing the severity of dextran sulfate sodium (DSS)-induced colitis. Adoptive transfer of bone marrow or peripheral monocytes from \u03b2-glucan-trained mice into naive mice conferred robust protection against colitis, demonstrating that this protective effect is transferable. Trained mice also displayed improved clearance of intestinal bacterial infections. Single-cell RNA sequencing revealed an expansion of reparative Cx3cr1\n                    <jats:sup>+<\/jats:sup>\n                    macrophages derived from Ly6C\n                    <jats:sup>hi<\/jats:sup>\n                    monocytes, correlating with accelerated colonic epithelial regeneration. Collectively, these findings reveal how \u03b2-glucan-induced trained immunity modulates monocyte differentiation to ameliorate experimental colitis, highlighting the potential of harnessing trained immunity as a therapeutic strategy to recalibrate innate immune responses and restore gut homeostasis in IBD, shedding light for future clinical applications.\n                  <\/jats:p>","DOI":"10.7554\/elife.107339","type":"journal-article","created":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T14:30:46Z","timestamp":1756305046000},"update-policy":"https:\/\/doi.org\/10.7554\/elife.107339","source":"Crossref","is-referenced-by-count":2,"title":["Beta-Glucan modulates monocyte plasticity and differentiation capacity to mitigate DSS-induced 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