SMARCA4 Loss Drives Germinal Center B Cell Lymphoma in Mouse Models
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A researcher now at the Chinese Academy of Medical Sciences/CIMR, previously trained at MD Anderson under M. Green, presented evidence that SMARCA4 (BRG1), the shared ATPase of the SWI/SNF chromatin remodeling complex, acts as a tumor suppressor in germinal center-derived B cell lymphoma. In conditional knockout mice, heterozygous SMARCA4 loss skewed germinal centers toward the dark zone and expanded recycling centrocyte-to-centroblast cells, while homozygous loss sharply reduced germinal centers. In the Eμ-Myc lymphoma model, heterozygous loss shortened survival. Mechanistically, the work linked SMARCA4 loss to reduced accessibility at transcription factor motifs including IRF4, BCL6 and PAX5 targets. The SWI/SNF inhibitor FHD-286 reduced tumor burden and extended survival in mutant tumors, suggesting a therapeutic angle. The findings were presented on 15 October 2026 and remain to be followed by further validation.
Written by a model from the reports · updated 2 hours ago
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A researcher trained at MD Anderson under M. Green and now at the Chinese Academy of Medical Sciences/CIMR presented work establishing SMARCA4 (BRG1), the shared ATPase of the SWI/SNF chromatin remodeling complex, as a tumor suppressor in germinal center-derived B cell lymphoma. In mouse conditional knockout models, heterozygous SMARCA4 loss skewed germinal centers toward the dark zone and expanded recycling centrocyte-to-centroblast cells, while homozygous loss sharply reduced germinal centers; in the Eμ-Myc lymphoma model, heterozygous loss shortened survival. The SWI/SNF inhibitor FHD-286 reduced tumor burden and extended survival in mutant tumors, with mechanistic work showing loss of accessibility at transcription factor motifs including IRF4, BCL6 and PAX5 targets.
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