Rapid Discovery of Highly Potent and Selective Inhibitors of Histone Deacetylase 8 Using Click Chemistry to Generate Candidate Libraries
作者:Takayoshi Suzuki、Yosuke Ota、Masaki Ri、Masashige Bando、Aogu Gotoh、Yukihiro Itoh、Hiroki Tsumoto、Prima R. Tatum、Tamio Mizukami、Hidehiko Nakagawa、Shinsuke Iida、Ryuzo Ueda、Katsuhiko Shirahige、Naoki Miyata
DOI:10.1021/jm300837y
日期:2012.11.26
μM), which was more potent than PCI-34058 (6) (IC50 = 0.31 μM), a known HDAC8 inhibitor. Molecular modeling suggested that the phenylthiomethyl group of C149 binds to a unique hydrophobic pocket of HDAC8, and the orientation of the phenylthiomethyl and hydroxamate moieties (fixed by the triazole moiety) is important for the potency and selectivity. The inhibitors caused selective acetylation of cohesin
为了找到HDAC8选择性抑制剂,我们设计了一个HDAC抑制剂候选物库,每个候选物均包含一个与活性位点锌离子配位的锌结合基团,并通过三唑部分连接至一个与帽沿边缘上的残基相互作用的加帽结构活动站点。这些化合物通过点击化学合成。筛选鉴定出的HDAC8选择性抑制剂包括C149(IC 50 = 0.070μM),其比已知的HDAC8抑制剂PCI-34058(6)(IC 50 = 0.31μM)更有效。分子建模表明,C149的苯硫基甲基结合到HDAC8的独特疏水口袋,并且苯硫甲基和异羟肟酸酯部分(由三唑部分固定)的方向对于效价和选择性很重要。抑制剂引起细胞内黏附素的选择性乙酰化,并对T细胞淋巴瘤和神经母细胞瘤细胞产生生长抑制作用(GI 50 = 3–80μM)。这些发现表明,HDAC8-选择性抑制剂具有作为抗癌药的潜力。