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Discovery of naphthacemycins as a novel class of PARP1 inhibitors
Wenbin Shen1, Xinhua Lu2, Jingtong Zhu1
1New Drug Research & Development Center, North China Pharmaceutical Group Corporation, Shijiazhuang 050015, Hebei, China; Key Laboratory for New Drug Screening Technology of Shijiazhuang City, Shijiazhuang 050015, Hebei, China.
Abstract:
Poly (ADP-ribose) polymerase-1 (PARP-1) is an abundant nuclear protein that plays important roles in a variety of nuclear processes, and it has been proved a prominent target in oncology for its key function in DNA damage repair. In this study, we discovered a series of naphthacemycins as a new class of PARP1 inhibitors from a microbial metabolites library via high-throughput screening. Compound I, one of this series of compounds, could reduce cellular poly (ADP-ribose) level, trap PARP1 on the damaged DNA and elevate the level of γ-H2AX, and showed the selective cytotoxicity against BRCA1-deficient cell line. Our study provided a potential scaffold for the development of new PARP1 inhibitors in cancer therapy.
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