2-Benzazolyl-4-Piperazin-1-Ylsulfonylbenzenecarbohydroxamic Acids as Novel Selective Histone Deacetylase-6 Inhibitors with Antiproliferative Activity
作者:Lei Wang、Marina Kofler、Gerald Brosch、Jelena Melesina、Wolfgang Sippl、Elisabeth D. Martinez、Johnny Easmon
DOI:10.1371/journal.pone.0134556
日期:——
e ring was replaced by the isosteric heterocycles benzimidazole, benzoxazole, and benzothiazole and the position of the hydroxamic acid substituent on the phenyl ring was varied. Whereas compounds bearing a para substituted hydroxamic acid (9a-d) were active HDAC inhibitors, the meta substituted analogues (8a-d) were appreciably inactive. Compounds 9a-d selectively inhibited HDAC6 (IC50 = 0.1-1.0 μM)
我们已经在建立的基于细胞的测定法中筛选了我们的化合物集合,该测定法测量表观遗传沉默的转基因的去阻抑,即基因座去阻抑测定。该筛选导致鉴定出4- [4-(1-(甲基苯并咪唑-2-基)哌嗪-1-基]磺酰基苯碳氧肟酸(9b)作为抑制HDAC1的活性物质。在初始结构活性关系研究中,1-甲基苯并咪唑环被等位杂环苯并咪唑,苯并恶唑和苯并噻唑取代,并且异羟肟酸取代基在苯环上的位置也有所变化。带有对位取代的异羟肟酸(9a-d)的化合物是活性HDAC抑制剂,而间位取代的类似物(8a-d)则无活性。与HDAC1(IC50 = 0)相比,化合物9a-d选择性抑制HDAC6(IC50 = 0.1-1.0μM)。而且,与患者匹配的正常细胞相比,也有选择性地抑制了肺癌细胞(9-6μM)的生长。与对照组相比,该化合物在S期诱导细胞周期停滞,而细胞凋亡的诱导则可忽略。分子模型研究发现,9a-d与HDAC6相互作用的MM-G