"Repaired and Activated" DNAzyme Enables the Monitoring of DNA Alkylation Repair in Live Cells.

Abstract

Direct measurement of DNA repair is critical for the annotation of their clinical relevance and the discovery of drugs for cancer therapy. Here we reported a "repaired and activated" DNAzyme (RADzyme) by incorporating a single methyl lesion (O6 MeG, 3MeC, or 1MeA) at designated positions through systematic screening. We found that the catalytic activity of the RADzyme was remarkably suppressed and could be restored via enzyme-mediated DNA repair. Benefit from these findings, a fluorogenic RADzyme sensor was developed for the monitoring of MGMT-mediated repair of O6 MeG lesion. Importantly, the sensor allowed the evaluation of MGMT repair activity in different cells and under drugs treatment. Furthermore, another RADzyme sensor was engineered for the monitoring of ALKBH2-mediated repair of 3MeC lesion. This strategy provides a simple and versatile tool for the study of the basic biology of DNA repair, clinical diagnosis and therapeutic assessment.

• Authors: Xiangnan Wang, Xin Yi, Zhimei Huang, Jianjun He, Zhenkun Wu, Xia Chu, Jian-Hui Jiang
• Journal: Angewandte Chemie (International ed. in English) (Angew Chem Int Ed Engl) Vol. 60 Issue 36 Pg. 19889-19896 (09 01 2021) ISSN: 1521-3773 [Electronic] Germany
• PMID: 34165234 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: © 2021 Wiley-VCH GmbH.

Chemical References

• DNA, Catalytic
• DNA

Topics

• Alkylation
• Cell Line, Tumor
• DNA (chemistry, metabolism)
• DNA Repair
• DNA, Catalytic (metabolism)
• Humans