The NuRD complex-mediated p21 suppression facilitates chemoresistance in BRCA-proficient breast cancer.

Abstract

The Mi-2/nucleosome remodeling and deacetylase (NuRD) complex play a role in silencing gene expression. CHD4, the core component of the NuRD complex, which cooperates with histone deacetylase in reducing tumor suppressor genes (TSGs). To dissect the mechanisms underlying cancer promotion, we clarify the role of CHD4 in cyclin-dependent kinase inhibitor protein p21. Here, our data indicates that CHD4 deficiency impairs the recruitments of HDAC1 to the p21 promoter. ~ 300bp proximal promoter region is responsible for CHD4-HDAC1 axis-mediated p21 transcriptional activity. For identifying the role of anti-cancer drug response, knockdown of p21 overcomes cisplatin and poly-(ADP-ribose) polymerase (PARP) inhibitor-mediated growth suppression in CHD4-depleted cells. Consistent with in vitro data, tissue of patients and bioinformatics approach also showed positive correlation between CHD4 and p21. Overall, our findings not only identify that CHD4 deficiency preferentially impairs cell survival via increasing the level of p21, but also establishes targeting CHD4 as a potential therapeutic implication in BRCA-proficient breast cancer treatment.

• Authors: Ming-Feng Hou, Chi-Wen Luo, Tsung-Ming Chang, Wen-Chun Hung, Tzu-Yi Chen, Ya-Li Tsai, Chee-Yin Chai, Mei-Ren Pan
• Journal: Experimental cell research (Exp Cell Res) Vol. 359 Issue 2 Pg. 458-465 (10 15 2017) ISSN: 1090-2422 [Electronic] United States
• PMID: 28842166 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2017 Elsevier Inc. All rights reserved.

Chemical References

• Antineoplastic Agents
• Autoantigens
• CHD4 protein, human
• Cyclin-Dependent Kinase Inhibitor p21
• DNA
• Poly(ADP-ribose) Polymerases
• HDAC1 protein, human
• Histone Deacetylase 1
• Mi-2 Nucleosome Remodeling and Deacetylase Complex
• Cisplatin

Topics

• Antineoplastic Agents (pharmacology)
• Autoantigens (genetics, metabolism)
• Cell Line, Tumor
• Chromatin Assembly and Disassembly
• Cisplatin (pharmacology)
• Cyclin-Dependent Kinase Inhibitor p21 (genetics, metabolism)
• DNA (genetics, metabolism)
• DNA Breaks, Double-Stranded
• DNA Repair
• Databases, Protein
• Drug Resistance, Neoplasm (genetics)
• Female
• Gene Expression Regulation, Neoplastic
• Histone Deacetylase 1 (genetics, metabolism)
• Humans
• Mi-2 Nucleosome Remodeling and Deacetylase Complex (genetics, metabolism)
• Poly(ADP-ribose) Polymerases (genetics, metabolism)
• Promoter Regions, Genetic
• Protein Array Analysis
• Signal Transduction