Arsenic Disruption of DNA Damage Responses—Potential Role in Carcinogenesis and Chemotherapy

Biomolecules

Clarisse S. Muenyi²  Mats Ljungman⁴  J. Christopher States¹  Wolf-Dietrich Heyer³  Thomas Helleday³ 

[1] Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY 40292, USA;Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY 40292, USA; E-Mail:;Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY 40292, USA; E-Mail;Departments of Radiation Oncology and Environmental Health Sciences, University of Michigan, Ann Arbor, MI 48109-2800, USA; E-Mail:

关键词: arsenic;    DNA repair;    DNA damage response;    ubiquitination;    XPC;    MSH2;   

DOI  :  10.3390/biom5042184

来源: mdpi

【 摘 要 】

Arsenic is a Class I human carcinogen and is widespread in the environment. Chronic arsenic exposure causes cancer in skin, lung and bladder, as well as in other organs. Paradoxically, arsenic also is a potent chemotherapeutic against acute promyelocytic leukemia and can potentiate the cytotoxic effects of DNA damaging chemotherapeutics, such as cisplatin, in vitro. Arsenic has long been implicated in DNA repair inhibition, cell cycle disruption, and ubiquitination dysregulation, all negatively impacting the DNA damage response and potentially contributing to both the carcinogenic and chemotherapeutic potential of arsenic. Recent studies have provided mechanistic insights into how arsenic interferes with these processes including disruption of zinc fingers and suppression of gene expression. This review discusses these effects of arsenic with a view toward understanding the impact on the DNA damage response.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.