ArticlebioRxiv : the preprint server for biology2024
Modulation of β-Catenin is important to promote WNT expression in macrophages and mitigate intestinal injury.
Article in bioRxiv : the preprint server for biology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Macrophages are the major source of WNT ligands. Macrophage-derived WNT is one of the most potent regenerative signals to mitigate intestinal injury. However, regulation of WNT expression in macrophages has not been studied. In the present study, we discovered that activation of canonical β-Catenin suppresses WNT expression in macrophages. Our CHIP-seq and validation study demonstrated the involvement of β-Catenin in the transcriptional regulation of WNT expression. Genetic and pharmacological approaches to de-stabilize/inactivate β-Catenin induce WNT expression in macrophages. Extracellular vesicles (EVs) are a major career of WNT ligands. Transfusion of EVs from pre-conditioned WNT-enriched macrophages demonstrated significant regenerative benefit over native macrophage-derived EVs to mitigate radiation-induced intestinal injury. Transfusion of WNT-enriched EVs also reduces DSS-induced colitis. Our study provides substantial evidence to consider that macrophage-targeted modulation of canonical WNT signaling to induce WNT expression followed by treatment with WNT-enriched EVs can be a lead therapy against intestinal injury.. SUMMARY: Activation of β-Catenin suppresses WNT expression in macrophages. Macrophage-targeted pharmacological modulation of canonical WNT signaling followed by adoptive transfer mitigate radiation injury in intestine. EVs from these preconditioned macrophages mitigate chemical or radiation induced intestinal injury.
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