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Yang, Guan‐Jun; Wang, Wanhe; Mok, Simon Wing Fai; Wu, Chun; Law, Betty Yuen Kwan; Miao, Xiang‐Min; Wu, Ke‐Jia; Zhong, Hai‐Jing; Wong, Chun‐Yuen; Wong, Vincent Kam Wai; Ma, Dik‐Lung; Leung, Chung‐Hang
Angewandte Chemie International Edition, October 1, 2018, Letnik: 57, Številka: 40Journal Article
Lysine‐specific demethylase 5A (KDM5A) has recently become a promising target for epigenetic therapy. In this study, we designed and synthesized metal complexes bearing ligands with reported demethylase and p27 modulating activities. The Rh(III) complex 1 was identified as a direct, selective and potent inhibitor of KDM5A that directly abrogate KDM5A demethylase activity via antagonizing the KDM5A‐tri‐/di‐methylated histone 3 protein–protein interaction (PPI) in vitro and in cellulo. Complex 1 induced accumulation of H3K4me3 and H3K4me2 levels in cells, causing growth arrest at G1 phase in the triple‐negative breast cancer (TNBC) cell lines, MDA‐MB‐231 and 4T1. Finally, 1 exhibited potent anti‐tumor activity against TNBC xenografts in an in vivo mouse model, presumably via targeting of KDM5A and hence upregulating p27. Moreover, complex 1 was less toxic compared with two clinical drugs, cisplatin and doxorubicin. To our knowledge, complex 1 is the first metal‐based KDM5A inhibitor reported in the literature. We anticipate that complex 1 may be used as a novel scaffold for the further development of more potent epigenetic agents against cancers, including TNBC. A rhodium(III)‐based complex has been discovered as an inhibitor of KDM5A, an epigenetic target for triple‐negative breast cancer. The complex inhibited the KDM5A–H3K4me3 interaction and suppressed proliferation of triple‐negative breast cancer (TNBC) tumors in mice and may be used as a novel scaffold for further development of more potent epigenetic agents against cancers, including TNBC.
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