ArticleCell death & disease2025
Cytochrome b5 reductase orchestrates IL-1β production in macrophages through FAD.
Article in Cell death & disease, 2025. 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
The cytochrome-b5 reductases (CYB5Rs) regulate cellular redox balance and contribute to the pathogenesis of inflammatory diseases. However, the roles of CYB5R5 in macrophages remain poorly understood and require further elucidation. In this study, we revealed that CYB5R5 orchestrates macrophage inflammation by inhibiting interleukin (IL)-1β production from M1 macrophages. Mechanistically, CYB5R5 enhances flavin adenine dinucleotide (FAD)-lysine demethylase1 (LSD1) signaling to regulate the histone demethylation of complement component 1, q subcomponent (C1q)-coding genes, thereby lowering NLRP3 inflammasome assembly. We also found that myeloid depletion of Cyb5r5 in mice exacerbates inflammatory responses in LPS-induced sepsis. This study reveals that CYB5R5 attenuates M1 macrophage polarization via metabolic and epigenetic reprogramming mechanism, thus providing potential therapeutic targets for macrophage-mediated inflammatory disorders.
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