title: Discovery of selective protein arginine methyltransferase 5 inhibitors and biological evaluations.
abstract: Protein arginine methyltransferase 5 (PRMT5) is an important protein arginine methyltransferase that catalyzes the symmetric dimethylation of arginine resides on histones or non-histone substrate proteins. It has been thought as a promising target for many diseases, particularly cancer. Despite the potential applications of PRMT5 inhibitors in cancer treatment, very few of PRMT5i have been publicly reported. In this investigation, virtual screening and structure-activity relationship studies were carried out to discover novel PRMT5i, which finally led to the identification of a number of new PRMT5i. The most active compound, P5i-6, exhibited a considerable inhibitory potency against PRMT5 with an IC50value of 0.57 μm, and a high selectivity for PRMT5 against other tested PRMTs. It displayed a very good antiviability activity against two colorectal cancer cell lines, HT-29 and DLD-1, and one hepatic cancer cell line, HepG2, in a sensitivity assay against 36 different cancer cell lines. Western blot assays indicated that P5i-6 selectively inhibited the symmetric dimethylations of H4R3 and H3R8 in DLD-1 cells. Overall, P5i-6 could be used as a chemical probe to investigate new functions of PRMT5 in biology and also served as a good lead compound for the development of new PRMT5-targeting therapeutic agents.
authors.affiliation: State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan, China.
authors.forename: Sen
authors.initials: S
authors.lastname: Ji
authors.affiliation: State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan, China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Ma
authors.affiliation: State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan, China.
authors.forename: Wen-Jing
authors.initials: WJ
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan, China.
authors.forename: Shen-Zhen
authors.initials: SZ
authors.lastname: Huang
authors.affiliation: Department of Clinical Medicine, School of Medicine, Nankai University, Tianjin, China.
authors.forename: Tian-Qi
authors.initials: TQ
authors.lastname: Wang
authors.affiliation: Department of Clinical Medicine, School of Medicine, Nankai University, Tianjin, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Xiang
authors.affiliation: State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan, China.
authors.forename: Yi-Guo
authors.initials: YG
authors.lastname: Hu
authors.affiliation: State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Chen
authors.affiliation: West China School of Pharmacy, Sichuan University, Chengdu, Sichuan, China.
authors.forename: Lin-Li
authors.initials: LL
authors.lastname: Li
authors.affiliation: State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan, China.
authors.forename: Sheng-Yong
authors.initials: SY
authors.lastname: Yang
mesh_terms: D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D055808:Drug Discovery; D004354:Drug Screening Assays, Antitumor; D004791:Enzyme Inhibitors / Q000737:chemistry / Q000494:pharmacology*; D006657:Histones / Q000378:metabolism; D006801:Humans; D008745:Methylation; D062105:Molecular Docking Simulation; D011484:Protein-Arginine N-Methyltransferases / Q000037:antagonists & inhibitors*; D066244:Proton Magnetic Resonance Spectroscopy; D013329:Structure-Activity Relationship
chemical_list: D004791:Enzyme Inhibitors; D006657:Histones; C400529:PRMT5 protein, human; D011484:Protein-Arginine N-Methyltransferases
keywords: biological screening; structure-based drug design; virtual screening