The targeting of cancer cell intrinsic metabolism has emerged as a promising strategy for antitumor intervention. In the study, we identified the first-in-class small molecules that effectively inhibit both mutant isocitrate dehydrogenase 1 (mIDH1) and nicotinamide phosphoribosyltransferase (NAMPT), two crucial targets in cancer metabolism, through structure-based drug design. Notably, compound 23h exhibits excellent and balanced inhibitory activities against both mIDH1 (IC₅₀ = 14.93 nM) and NAMPT (IC₅₀ = 12.56 nM), leading to significant suppression of IDH1-mutated glioma cell (U87 MG-IDH1^R132H) proliferation. Significantly, compound 23h has the ability to cross the blood–brain barrier (B/P ratio, 0.76) and demonstrates remarkable in vivo antitumor efficacy (20 mg/kg) in the U87 MG-IDH1^R132H orthotopic transplantation mouse models without any notable toxicity. This proof-of-concept investigation substantiates the viability of discovering small molecules that concurrently target mIDH1 and NAMPT, providing valuable leads for the treatment of glioma and an efficient approach for the discovery of multitarget antitumor drugs.

中文翻译：

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发现针对突变 IDH1 和 NAMPT 的新型双重抑制剂，用于治疗 IDH1 突变的胶质瘤

靶向癌细胞内在代谢已成为一种有前景的抗肿瘤干预策略。在这项研究中，我们通过基于结构的药物设计，鉴定出了能够有效抑制突变异柠檬酸脱氢酶 1 (mIDH1) 和烟酰胺磷酸核糖基转移酶 (NAMPT) 这两个癌症代谢关键靶点的一流小分子。值得注意的是，化合物23h对 mIDH1 (IC ₅₀ = 14.93 nM) 和 NAMPT (IC ₅₀ = 12.56 nM) 表现出优异且平衡的抑制活性，从而显着抑制 IDH1 突变的神经胶质瘤细胞 (U87 MG-IDH1 ^R132H ) 增殖。值得注意的是，化合物23h具有穿过血脑屏障的能力（B/P 比值，0.76），并在 U87 MG-IDH1 R132H^原位移植小鼠模型中表现出显着的体内抗肿瘤功效（20 mg/kg），且没有任何明显的毒性。这项概念验证研究证实了发现同时靶向 mIDH1 和 NAMPT 的小分子的可行性，为神经胶质瘤的治疗提供了有价值的线索，并为发现多靶点抗肿瘤药物提供了有效的方法。