Design, Synthesis and Activity Evaluation of New Phthalazinone PARP Inhibitors

作者：Mingqi Huang, Jinghui Ren, Yuhong Wang, Xixi Chen, Jia Yang, Tu Tang, Zhenyong Yang, Xiaojing Li, Min Ji, Jin Cai · 发表于：Chemical and Pharmaceutical Bulletin · 年份：2021 · DOI：10.1248/cpb.c20-01018 · 被引用次数：13 · 研究领域：PARP inhibition in cancer therapy、Integrated Circuits and Semiconductor Failure Analysis、Toxin Mechanisms and Immunotoxins

Poly(ADP-ribose)polymerase (PARP) is a significant therapeutic target for the treatment of numerous human diseases. Olaparib has been approved as a PARP inhibitor. In this paper, a series of new compounds were designed and synthesized with Olaparib as the lead compound. In order to evaluate the inhibitory activities against PARP1 of the synthesized compounds, in vitro PARP1 inhibition assay and intracellular PARylation assay were conducted. The results showed that the inhibitory activities of the derivatives were related to the type of substituent and the length of alkyl chain connecting the aromatic ring. 3-(4,5-Dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide (MTT)-based assay also proved that these compounds demonstrating strong inhibition to PARP1 also have high anti-proliferative activities against BRCA2-deficient cell line (Capan-1). Analysis of the entire results suggest that compound 23 with desirable inhibitory efficiency may hold promise for further in vivo exploration of PARP inhibition.