Synthesis of heterocyclic ring-fused tricyclic diterpene analogs as novel inhibitors of RANKL-induced osteoclastogenesis and bone resorption
作者:Gao Wei、Yalan Wu、Xiao-Long He、Ting Liu、Mingyao Liu、Jian Luo、Wen-Wei Qiu
DOI:10.1016/j.ejmech.2017.03.008
日期:2017.5
A series of heterocyclic ring-fused tricyclic diterpene analogs were synthesized and their inhibitory effects of RANKL-induced osteoclastogenesis were evaluated on bone marrow-derived monocytes (BMMs) by a cell based tartrate-resistant acid phosphatase (TRAP) activity assay. Among them, the most potent compound, 37 (QG368), showed 72.3% inhibition even at a low concentration of 0.1 μM, which was about
合成了一系列杂环稠合的三环二萜类似物,并通过基于细胞的抗酒石酸酸性磷酸酶(TRAP)活性分析评估了RANKL诱导的破骨细胞对骨髓单核细胞(BMM)的抑制作用。其中,最有效的化合物37(QG368)甚至在0.1μM的低浓度下也显示出72.3%的抑制作用,其效力比前导化合物高约188倍。BMMs的细胞毒性试验表明,对37种破骨细胞分化的抑制不是由其细胞毒性引起的。此外,37个也没有显示出明显的成骨细胞分化作用。机理研究表明,37种蛋白可以抑制破骨细胞生成相关的标志物基因的表达,包括Nfatc1,TRAP,组织蛋白酶K,C-src和CTR。特别是,37可能会降低卵巢切除术诱导的破骨细胞活性,并在体内明显缓解骨质疏松症。因此,这些三环二萜类似物可以作为开发新型抗吸收剂的有前途的线索。