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Yu D, Wang L, Li J, Zeng X, Jia Y, Tian J, Campbell A, Sun H, Fan H. Dual-responsive probe and DNA interstrand crosslink precursor target the unique redox status of cancer cells. Chem Commun (Camb) 2023; 59:14705-14708. [PMID: 37997159 DOI: 10.1039/d3cc05175g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
Elevated GSH and H2O2 in cancer cells is sometimes doubted due to their contrary reactivities. Here, we construct a dual-responsive fluorescent probe to confirm the conclusion, and employ this to exploit a redox-inducible DNA interstrand crosslink (ICL) precursor. It crosslinks DNA upon activation by GSH and H2O2, affording an alternative dual-responsive strategy.
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Affiliation(s)
- Dehao Yu
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Luo Wang
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Jingao Li
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Xuanwei Zeng
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Yuanyuan Jia
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Junyu Tian
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Anahit Campbell
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA
| | - Huabing Sun
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Heli Fan
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
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Byrne SR, Rokita SE. Unraveling Reversible DNA Cross-Links with a Biological Machine. Chem Res Toxicol 2020; 33:2903-2913. [PMID: 33147957 DOI: 10.1021/acs.chemrestox.0c00413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reversible generation and capture of certain electrophilic quinone methide intermediates support dynamic reactions with DNA that allow for migration and transfer of alkylation and cross-linking. This reversibility also expands the possible consequences that can be envisioned when confronted by DNA repair processes and biological machines. To begin testing the response to such an encounter, quinone methide-based modification of DNA has now been challenged with a helicase (T7 bacteriophage gene protein four, T7gp4) that promotes 5' to 3' translocation and unwinding. This model protein was selected based on its widespread application, well characterized mechanism and detailed structural information. Little over one-half of the cross-linking generated by a bisfunctional quinone methide remained stable to T7gp4 and did not suppress its activity. The helicase likely avoids the topological block generated by this fraction of cross-linking by its ability to shift from single- to double-stranded translocation. The remaining fraction of cross-linking was destroyed during T7gp4 catalysis. Thus, this helicase is chemically competent to promote release of the quinone methide from DNA. The ability of T7gp4 to act as a Brownian ratchet for unwinding DNA may block recapture of the QM intermediate by DNA during its transient release from a donor strand. Most surprisingly, T7gp4 releases the quinone methide from both the translocating strand that passes through its central channel and the excluded strand that was typically unaffected by other lesions. The ability of T7gp4 to reverse the cross-link formed by the quinone methide does not extend to that formed irreversibly by the nitrogen mustard mechlorethamine.
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Affiliation(s)
- Shane R Byrne
- Chemistry Biology Interface Graduate Training Program and Department of Chemistry, Johns Hopkins University, 3400 N. Charles St., Baltimore, Maryland 21218, United States
| | - Steven E Rokita
- Chemistry Biology Interface Graduate Training Program and Department of Chemistry, Johns Hopkins University, 3400 N. Charles St., Baltimore, Maryland 21218, United States
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