Valeriaquinone A,a unique anthraquinone–coumarin hybrid with selective inhibition of PTP1B from Knoxia valerianoides  

作　　者：Yan Jiang Ren-Yong Yang Zhao-Xia Qu Gui-Ge Hou Wei Cong Chun-Hua Wang Feng Zhao 

机构地区：[1]The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine,School of Pharmacy,Binzhou Medical University,Yantai 264003,China

出　　处：《Chinese Chemical Letters》2022年第6期2919-2922,共4页中国化学快报（英文版）

基　　金：National Natural Science Foundation of China(No.81703391);Shandong Provincial Natural Science Foundation of China(No.ZR2020KB015);Key R&D Program of Shandong Province(No.2019JZZY011104,China)。

摘　　要：Valeriaquinone A(1),an unprecedented anthraquinone–coumarin hybrid,was isolated from the roots of Knoxia valerianoides.Its structure was determined by extensive spectroscopic analyses and X-ray diffraction.The plausible biosynthetic pathways for 1 were proposed.Compound 1 exhibited strong protein tyrosine phosphatase 1 B(PTP1 B)inhibition with high selectivity(>30 fold)over homologous T cell protein tyrosine phosphatase(TCPTP)potentially by binding to an allosteric site predicted by kinetic analysis and molecular docking.Moreover,compound 1 showed significant cytotoxic activities against three human hepatoma cell lines(HepG2,QGY-7703,and SMMC-7721)with half maximal inhibitory concentration(IC_(50))values of 1.39±0.2,10.34±2.09,and 5.56±0.47μmol/L,respectively.

关 键 词：Knoxia valerianoides Anthraquinone–coumarin hybrid PTP1B inhibitory activity Cytotoxic activity Allosteric inhibition 

分 类 号：TQ460.1[化学工程—制药化工]