ArticleScience advances2026
Intra-cluster receptor density (IRD): A molecular switch for TNFR1 clusters' signaling.
Article in Science advances, 2026. 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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8 authors.
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Abstract
Tumor necrosis factor receptor 1 (TNFR1) signaling regulates cell fate in inflammation, immune responses, and tumorigenesis. While TNF-α-mediated TNFR1 pathways are well known, the role of receptor clustering remains unclear. Utilizing homo-FRET using fluorescence anisotropy, we show that intra-cluster receptor density (IRD) governs TNFR1 signaling outcomes. Soluble TNF-α (sTNF-α) increases IRD at cluster cores but decreases it at rims via receptor reorganization. Reducing IRD through membrane tension, zafirlukast, actin depolymerization, or cholesterol depletion suppresses sTNF-α signaling, whereas increasing IRD by lowering membrane tension or exposing cells in a 3D gel-like microenvironment triggers ligand-independent activation. These findings reveal IRD as a key regulator of receptor signaling, with potential relevance across related receptor families and innovative strategies in modulating TNFR1 signaling.
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