Identification of viral SIM-SUMO2-interaction inhibitors for treating primary effusion lymphoma

Autoři: Ling Ding aff001;  Qing Zhu aff001;  Feng Zhou aff003;  Hongsheng Tan aff004;  Wenjia Xu aff005;  Chengling Pan aff006;  Caixia Zhu aff001;  Yuyan Wang aff001;  Hong Zhang aff004;  Wenwei Fu aff004;  Zhikang Qian aff005;  Zhenghong Yuan aff001;  Hongxi Xu aff004;  Fang Wei aff002;  Qiliang Cai aff001
Působiště autorů: MOE& NHC&CAMS Key Laboratory of Medical Molecular Virology, School of Basic Medical Science, Shanghai Medical College, Fudan University, Shanghai, P. R. China aff001;  ShengYushou Center of Cell Biology and Immunology, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, P. R. China aff002;  Baoji Affiliated Hospital of Xi’an Medical University, Baoji & MOE Key Laboratory of Western Resources and Modern Biotechnology, College of Life Sciences, Northwest University, Xi’an, Shaanxi, China aff003;  School of Pharmacy, Shanghai University of Traditional Chinese Medicine & Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai, China aff004;  Unit of Herpesvirus and Molecular Virology, Key Laboratory of Molecular Virology & Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, P. R. China aff005;  Beijing Computing Center, Beijing Academy of Science and Technology & Beijing Beike Deyuan Bio-Pharm Technology Company, Beijing, P. R. China aff006;  Expert Workstation, Baoji Central Hospital, Baoji, P. R. China aff007
Vyšlo v časopise: Identification of viral SIM-SUMO2-interaction inhibitors for treating primary effusion lymphoma. PLoS Pathog 15(12): e32767. doi:10.1371/journal.ppat.1008174
Kategorie: Research Article


Primary effusion lymphoma (PEL) is an aggressive B-cell malignancy without effective treatment, and caused by the infection of Kaposi’s sarcoma-associated herpesvirus (KSHV), predominantly in its latent form. Previously we showed that the SUMO2-interacting motif within the viral latency-associated nuclear antigen (LANASIM) is essential for establishment and maintenance of KSHV latency. Here, we developed a luciferase based live-cell reporter system to screen inhibitors selectively targeting the interaction between LANASIM and SUMO2. Cambogin, a bioactive natural product isolated from the Garcinia genus (a traditional herbal medicine used for cancer treatment), was obtained from the reporter system screening to efficiently inhibit the association of SUMO2 with LANASIM, in turn reducing the viral episome DNA copy number for establishment and maintenance of KSHV latent infection at a low concentration (nM). Importantly, Cambogin treatments not only specifically inhibited proliferation of KSHV-latently infected cells in vitro, but also induced regression of PEL tumors in a xenograft mouse model. This study has identified Cambogin as a novel therapeutic agent for treating PEL as well as eliminating persistent infection of oncogenic herpesvirus.

Klíčová slova:

Cancer treatment – Cytotoxicity – Immunoblotting – Immunoprecipitation – Kaposi's sarcoma-associated herpesvirus – Mouse models – Polymerase chain reaction – Virions


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