"Repaired and Activated" DNAzyme Enables the Monitoring of DNA Alkylation Repair in Live Cells. Issue 36 (30th July 2021)

• Record Type: Journal Article
• Authors: Wang, Xiangnan; Yi, Xin; Huang, Zhimei; He, Jianjun; Wu, Zhenkun; Chu, Xia; Jiang, Jian‐Hui
• Is Part Of: Angewandte Chemie international edition. Volume 60:Issue 36(2021)
• Page Start: 19889
• Page End: 19896
• Publication Date: 2021-07-30
• Subjects: biosensors -- cancer therapy -- DNA methylation -- DNA repair -- DNAzymes; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202106557
• Languages: English
• ISSNs: 1433-7851

Abstract

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 (O 6 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 O 6 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. Abstract : We report "repaired and activated" DNAzymes (RADzymes) as a simple and versatile platform for the measurement of multiple DNA alkylation repair in living cells. The catalytic activity of RADzymes was remarkably suppressed and could be restored via enzyme‐mediated DNA repair, thus providing a useful strategy for the study of DNA repair, clinical diagnosis and therapeutic assessment.