A Small Molecule Inhibitor of the BLM Helicase Modulates Chromosome Stability in Human Cells

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• 作者：Giang Huong Nguyen¹ ; ² ; ⁷ ; Thomas S. Dexheimer³ ; ⁷ ; Andrew S. Rosenthal³ ; Wai Kit Chu⁴ ; Dharmendra Kumar Singh⁶ ; Georgina Mosedale¹ ; Csaná ; d Z. Bachrati¹ ; Lena Schultz³ ; Masaaki Sakurai³ ; Pavel Savitsky⁵ ; Mika Abu¹ ; Peter J. McHugh¹ ; Vilhelm A. Bohr⁶ ; Curtis C. Harris² ; Ajit Jadhav³ ; Opher Gileadi⁵ ; David J. Maloney³ ; Anton Simeonov³ ; ^{asimeono@mail.nih.gov} ; Ian D. Hickson¹ ; ⁴ ; ^{iandh@sund.ku.dk}
• 刊名：Chemistry & Biology
• 出版年：2013
• 出版时间：24 January, 2013
• 年：2013
• 卷：20
• 期：1
• 页码：55-62
• 全文大小：553 K

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Summary

The Bloom¡¯s syndrome protein, BLM, is a member of the conserved RecQ helicase family. Although cell lines lacking BLM exist, these exhibit progressive genomic instability that makes distinguishing primary from secondary effects of BLM loss problematic. In order to be able to acutely disable BLM function in cells, we undertook a high throughput screen of a chemical compound library for small molecule inhibitors of BLM. We present ML216, a potent inhibitor of the DNA unwinding activity of BLM. ML216 shows cell-based activity and can induce sister chromatid exchanges, enhance the toxicity of aphidicolin, and exert antiproliferative activity in cells expressing BLM, but not those lacking BLM. These data indicate that ML216 shows strong selectivity for BLM in cultured cells. We discuss the potential utility of such a BLM-targeting compound as an anticancer agent.