It has been shown that PRMT5 inhibition by small molecules can selectively kill cancer cells with homozygous deletion of the MTAP gene if the inhibitors can leverage the consequence of MTAP deletion, namely, accumulation of the MTAP substrate MTA. Herein, we describe the discovery of TNG908, a potent inhibitor that binds the PRMT5·MTA complex, leading to 15-fold-selective killing of MTAP-deleted (MTAP-null) cells compared to MTAPintact (MTAP WT) cells. TNG908 shows selective antitumor activity when dosed orally in mouse xenograft models, and its physicochemical properties are amenable for crossing the blood–brain barrier (BBB), supporting clinical study for the treatment of both CNS and non-CNS tumors with MTAP loss.

中文翻译：

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TNG908 的发现：一种选择性、脑渗透性、MTA 协同 PRMT5 抑制剂，对 MTAP 缺失的癌症具有综合致死性

已经表明，如果抑制剂能够利用MTAP缺失的后果，即 MTAP 底物 MTA 的积累，小分子抑制 PRMT5 可以选择性杀死MTAP基因纯合缺失的癌细胞。在此，我们描述了 TNG908 的发现，TNG908 是一种结合 PRMT5·MTA 复合物的有效抑制剂，与MTAP完整 (MTAP WT) 细胞相比，可选择性杀死MTAP缺失 (MTAP-null) 细胞15 倍。 TNG908 在小鼠异种移植模型中口服给药时显示出选择性抗肿瘤活性，其理化特性适合穿过血脑屏障 (BBB)，支持治疗MTAP缺失的 CNS 和非 CNS 肿瘤的临床研究。