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Exploiting Synthetic Lethality for the Therapy of ABC Diffuse Large B Cell Lymphoma

机译:利用合成杀伤力治疗ABC弥漫性大B细胞淋巴瘤

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摘要

Knowledge of oncogenic mutations can inspire therapeutic strategies that are synthetically lethal, affecting cancer cells while sparing normal cells. Lenalidomide is an active agent in the activated B cell-like (ABC) subtype of diffuse large B cell lymphoma (DLBCL), but its mechanism of action is unknown. Lenalidomide kills ABC DLBCL cells by augmenting interferon β (IFNβ) production, owing to the oncogenic MYD88 mutations in these lymphomas. In a cereblon-dependent fashion, lenalidomide downregulates IRF4 and SPIB, transcription factors that together prevent IFNβ production by repressing IRF7 and amplify prosurvival NF-κB signaling by transactivating CARD11. Blockade of B cell receptor signaling using the BTK inhibitor ibrutinib also downregulates IRF4 and consequently synergizes with lenalidomide in killing ABC DLBCLs, suggesting attractive therapeutic strategies.
机译:致癌突变的知识可以激发综合致命性的治疗策略,影响癌细胞,同时保留正常细胞。来那度胺是弥漫性大B细胞淋巴瘤(DLBCL)的活化B细胞样(ABC)亚型中的活性剂,但其作用机理尚不清楚。由于这些淋巴瘤中的致癌性MYD88突变,来那度胺通过增加干扰素β(IFNβ)的产量杀死ABC DLBCL细胞。来那度胺以大脑依赖性的方式下调IRF4和SPIB,这是转录因子,它们通过抑制IRF7共同阻止IFNβ的产生,并通过反式激活CARD11来放大生存性NF-κB信号传导。使用BTK抑制剂依鲁替尼对B细胞受体信号的阻断作用还可以下调IRF4,从而在杀灭ABC DLBCLs中与来那度胺协同作用,提示了诱人的治疗策略。

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