Discovery of Isaindigotone Derivatives as Novel Bloom's Syndrome Protein (BLM) Helicase Inhibitors That Disrupt the BLM/DNA Interactions and Regulate the Homologous Recombination Repair.

Abstract:

:Homologous recombination repair (HRR), a crucial approach in DNA damage repair, is an attractive target in cancer therapy and drug design. The Bloom syndrome protein (BLM) is a 3'-5' DNA helicase that performs an important role in HRR regulation. However, limited studies about BLM inhibitors and their biological effects have been reported. Here, we identified a class of isaindigotone derivatives as novel BLM inhibitors by synthesis, screening, and evaluating. Among them, compound 29 was found as an effective BLM inhibitor with a high binding affinity and good inhibitory effect on BLM. Cellular evaluation indicated that 29 effectively disrupted the recruitment of BLM at DNA double-strand break sites, promoted an accumulation of RAD51, and regulated the HRR process. Meanwhile, 29 significantly induced DNA damage responses, as well as apoptosis and proliferation arrest in cancer cells. Our finding provides a potential anticancer strategy based on interfering with BLM via small molecules.

journal_name

J Med Chem

authors

Yin QK,Wang CX,Wang YQ,Guo QL,Zhang ZL,Ou TM,Huang SL,Li D,Wang HG,Tan JH,Chen SB,Huang ZS

doi

10.1021/acs.jmedchem.9b00083

subject

Has Abstract

pub_date

2019-03-28 00:00:00

pages

3147-3162

issue

6

eissn

0022-2623

issn

1520-4804

journal_volume

62

pub_type

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