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IL-23 plays key roles in antimicrobial macrophage activity

Key clinical point: Interleukin-23 optimizes antimicrobial macrophage activity, which is reduced in persons harboring an IL-23 receptor variant that helps protect against inflammatory bowel disease.

Major finding: Autocrine/paracrine IL-23 increases bacterial uptake by macrophages and induces faster and more effective clearance of intracellular bacteria. Macrophages from carriers of the IL-23 receptor–Q381 variant, which is protective against inflammatory bowel disease, showed reduced bacterial uptake and less effective intracellular clearance.

Data source: Western blot, flow cytometry, and gentamicin protection assays of human monocyte–derived macrophages.

Disclosures: The National Institutes of Health provided funding. The investigators reported having no conflicts of interest.


Sun R, Abraham C. Cell Molec Gastro Hepatol. 2020 May 28. doi.: 10.1016/j.jcmgh.2020.05.007.