ArticleNature communications2026
BRG1-mediated suppression of ferroptosis underlies BTK inhibitor resistance.
Article in Nature communications, 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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Abstract
Resistance to Bruton's tyrosine kinase inhibitors (BTKi) remains a major therapeutic challenge in B-cell malignancies. Here, we identify chromatin remodeler BRG1-mediated suppression of ferroptosis as a central mechanism of BTKi resistance in mantle cell lymphoma (MCL), in which aberrant BRG1-dependent transcription program protects cells from BTKi-induced ferroptosis by restricting reactive oxygen species (ROS) and labile iron. Mechanistically, BRG1 promotes resistance through regulation of both BTK-dependent survival signaling and a BTK-independent transcriptional program. The latter is mediated by BRG1-driven induction of MEF2B, which upregulates atypical mitochondrial complex I subunit NDUFA4L2. Increased NDUFA4L2 restricts cellular respiration, preemptively limiting mitochondrial ROS generation and activating AMPK signaling, together reducing susceptibility to lipid peroxidation and ferroptosis. Pharmacologic inhibition of BRG1 disrupts these programs, restoring ferroptotic sensitivity and synergizing with BTKi across resistant MCL models. Together, our study establishes BRG1 as a central regulator of BTKi resistance and provides a rationale for co-targeting BRG1 and BTK as a therapeutic strategy for B-cell malignancies.
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