Role of the multifunctional DNA repair and redox signaling protein Ape1/Ref-1 in cancer and endothelial cells

Small-molecule inhibition of the redox function of Ape1

Meihua Luo, Sarah Delaplane, Aihua Jiang, April Reed, Ying He, Melissa Fishel, Rodney L. Nyland, Richard F. Borch, Xiaoxi Qiao, Millie Georgiadis, Mark Kelley

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

The DNA base excision-repair pathway is responsible for the repair of DNA damage caused by oxidation/alkylation and protects cells against the effects of endogenous and exogenous agents. Removal of the damaged base creates a baseless (AP) site. AP endonuclease1 (Ape1) acts on this site to continue the BER-pathway repair. Failure to repair baseless sites leads to DNA strand breaks and cytotoxicity. In addition to the repair role of Ape1, it also functions as a major redox-signaling factor to reduce and activate transcription factors such as AP1, p53, HIF-1α, and others that control the expression of genes important for cell survival and cancer promotion and progression. Thus, the Ape1 protein interacts with proteins involved in DNA repair, growth-signaling pathways, and pathways involved in tumor promotion and progression. Although knockdown studies with siRNA have been informative in studying the role of Ape1 in both normal and cancer cells, knocking down Ape1 does not reveal the individual role of the redox or repair functions of Ape1. The identification of small-molecule inhibitors of specific Ape1 functions is critical for mechanistic studies and translational applications. Here we discuss small-molecule inhibition of Ape1 redox and its effect on both cancer and endothelial cells.

Original languageEnglish
Pages (from-to)1853-1867
Number of pages15
JournalAntioxidants and Redox Signaling
Volume10
Issue number11
DOIs
StatePublished - Nov 1 2008

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Endothelial cells
DNA Repair
Oxidation-Reduction
Repair
Endothelial Cells
Molecules
DNA
Neoplasms
Proteins
DNA Breaks
Alkylation
Small Interfering RNA
DNA Damage
Cells
Cell Survival
Transcription Factors
Gene Expression
Cytotoxicity
Growth
Tumors

ASJC Scopus subject areas

  • Biochemistry

Cite this

Role of the multifunctional DNA repair and redox signaling protein Ape1/Ref-1 in cancer and endothelial cells : Small-molecule inhibition of the redox function of Ape1. / Luo, Meihua; Delaplane, Sarah; Jiang, Aihua; Reed, April; He, Ying; Fishel, Melissa; Nyland, Rodney L.; Borch, Richard F.; Qiao, Xiaoxi; Georgiadis, Millie; Kelley, Mark.

In: Antioxidants and Redox Signaling, Vol. 10, No. 11, 01.11.2008, p. 1853-1867.

Research output: Contribution to journalArticle

Luo, Meihua ; Delaplane, Sarah ; Jiang, Aihua ; Reed, April ; He, Ying ; Fishel, Melissa ; Nyland, Rodney L. ; Borch, Richard F. ; Qiao, Xiaoxi ; Georgiadis, Millie ; Kelley, Mark. / Role of the multifunctional DNA repair and redox signaling protein Ape1/Ref-1 in cancer and endothelial cells : Small-molecule inhibition of the redox function of Ape1. In: Antioxidants and Redox Signaling. 2008 ; Vol. 10, No. 11. pp. 1853-1867.
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