1
|
Jing B, Liu M, Yang L, Cai HY, Chen JB, Li ZX, Kou X, Wu YZ, Qin DJ, Zhou L, Jin J, Lei H, Xu HZ, Wang WW, Wu YL. Characterization of naturally occurring pentacyclic triterpenes as novel inhibitors of deubiquitinating protease USP7 with anticancer activity in vitro. Acta Pharmacol Sin 2018; 39:492-498. [PMID: 29168472 PMCID: PMC5843828 DOI: 10.1038/aps.2017.119] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 07/21/2017] [Indexed: 12/23/2022] Open
Abstract
Deubiquitinating protease USP7 is a promising therapeutic target for cancer treatment, and interest in developing USP7 inhibitors has greatly increased. In the present study, we reported a series of natural pentacyclic triterpenes with USP7 inhibitory activity in vitro. Among them, both the ursane triterpenes and oleanane triterpenes were more active than the lupine triterpenes, whereas ursolic acid was the most potent with IC50 of 7.0±1.5 μmol/L. Molecular docking studies showed that ursolic acid might occupy the ubiquitin binding pocket of USP7, with the 17-carboxyl group and 3-hydroxyl group playing a vital role in the USP7-ursolic acid interaction. Using the cellular thermal shift assay, we demonstrated that ursolic acid interacted with USP7 in RPMI8226 human myeloma cells. Ursolic acid dose-dependently inhibited the proliferation of the myeloma cells with IC50 of 6.56 μmol/L, accompanied by reductions in USP7 substrates such as MDM2, UHRF1 and DNMT1. Overexpression of USP7 partially, but significantly attenuated ursolic acid-induced cell death as well as downregulation of MDM2, UHRF1 and DNMT1. In conclusion, we demonstrate for the first time that pentacyclic triterpenes represent a novel scaffold for developing USP7 inhibitors and that USP7 inhibition contributes to the anti-cancer effect of ursolic acid.
Collapse
Affiliation(s)
- Bo Jing
- Hongqiao International Institute of
Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Chemical Biology
Division of Shanghai Universities E-Institutes, Key Laboratory of Cell
Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao
Tong University School of Medicine, Shanghai
200025, China
| | - Meng Liu
- Hongqiao International Institute of
Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Chemical Biology
Division of Shanghai Universities E-Institutes, Key Laboratory of Cell
Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao
Tong University School of Medicine, Shanghai
200025, China
| | - Li Yang
- Hongqiao International Institute of
Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Chemical Biology
Division of Shanghai Universities E-Institutes, Key Laboratory of Cell
Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao
Tong University School of Medicine, Shanghai
200025, China
| | - Hai-yan Cai
- Hongqiao International Institute of
Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Chemical Biology
Division of Shanghai Universities E-Institutes, Key Laboratory of Cell
Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao
Tong University School of Medicine, Shanghai
200025, China
| | - Jie-bo Chen
- Hongqiao International Institute of
Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Chemical Biology
Division of Shanghai Universities E-Institutes, Key Laboratory of Cell
Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao
Tong University School of Medicine, Shanghai
200025, China
| | - Ze-xi Li
- Hongqiao International Institute of
Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Chemical Biology
Division of Shanghai Universities E-Institutes, Key Laboratory of Cell
Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao
Tong University School of Medicine, Shanghai
200025, China
| | - Xi Kou
- Hongqiao International Institute of
Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Chemical Biology
Division of Shanghai Universities E-Institutes, Key Laboratory of Cell
Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao
Tong University School of Medicine, Shanghai
200025, China
| | - Yun-zhao Wu
- Hongqiao International Institute of
Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Chemical Biology
Division of Shanghai Universities E-Institutes, Key Laboratory of Cell
Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao
Tong University School of Medicine, Shanghai
200025, China
| | - Dong-jun Qin
- Hongqiao International Institute of
Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Chemical Biology
Division of Shanghai Universities E-Institutes, Key Laboratory of Cell
Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao
Tong University School of Medicine, Shanghai
200025, China
| | - Li Zhou
- Department of Hematology, Rui-Jin
Hospital, Shanghai Jiao-Tong University School of Medicine,
Shanghai
200025, China
| | - Jin Jin
- Hongqiao International Institute of
Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Chemical Biology
Division of Shanghai Universities E-Institutes, Key Laboratory of Cell
Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao
Tong University School of Medicine, Shanghai
200025, China
| | - Hu Lei
- Hongqiao International Institute of
Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Chemical Biology
Division of Shanghai Universities E-Institutes, Key Laboratory of Cell
Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao
Tong University School of Medicine, Shanghai
200025, China
| | - Han-zhang Xu
- Hongqiao International Institute of
Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Chemical Biology
Division of Shanghai Universities E-Institutes, Key Laboratory of Cell
Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao
Tong University School of Medicine, Shanghai
200025, China
| | - Wei-wei Wang
- Hongqiao International Institute of
Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Chemical Biology
Division of Shanghai Universities E-Institutes, Key Laboratory of Cell
Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao
Tong University School of Medicine, Shanghai
200025, China
| | - Ying-li Wu
- Hongqiao International Institute of
Medicine, Shanghai Tongren Hospital/Faculty of Basic Medicine, Chemical Biology
Division of Shanghai Universities E-Institutes, Key Laboratory of Cell
Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao
Tong University School of Medicine, Shanghai
200025, China
| |
Collapse
|