ArticleProceedings of the National Academy of Sciences of the United States of America2023
Dissection of DNA damage and repair pathways in live cells by femtosecond laser microirradiation and free-electron modeling.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 16 citations in OpenAlex.
- Navigating the base excision repair pathway in chromatin-focus on oxidative DNA damage.Nucleic acids research · 2026Review
- Predicting and controlling laser-induced breakup and multidirectional propulsion of liquid droplets.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Crosstalk-Free Real-Time Precision Opto-Control of Biochemical Processes Through Intra-Pixel Optical Decoupling.Chemistry methods : new approaches to solving problems in chemistry · 2026Article
- Label-free tracking of subcortical white matter degradationBiomedical optics express · 2026Article
- Hyperthermal Reactions in DNA Triggered by 1-20 eV Electrons: Absolute Cross Sections for Crosslinks, Strand Breaks, Clustered Damages and Base Modifications.International journal of molecular sciences · 2025Article
- Oxygen Effect on 0-30 eV Electron Damage to DNA Under Different Hydration Levels: Base and Clustered Lesions, Strand Breaks and Crosslinks.Molecules (Basel, Switzerland) · 2024Article
- Laser synthesis of nanoparticles in organic solvents - products, reactions, and perspectives.Beilstein journal of nanotechnology · 2024Review
Corrections and comments
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Authors and funding
11 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Understanding and predicting the outcome of the interaction of light with DNA has a significant impact on the study of DNA repair and radiotherapy. We report on a combination of femtosecond pulsed laser microirradiation at different wavelengths, quantitative imaging, and numerical modeling that yields a comprehensive picture of photon-mediated and free-electron-mediated DNA damage pathways in live cells. Laser irradiation was performed under highly standardized conditions at four wavelengths between 515 nm and 1,030 nm, enabling to study two-photon photochemical and free-electron-mediated DNA damage in situ. We quantitatively assessed cyclobutane pyrimidine dimer (CPD) and γH2AX-specific immunofluorescence signals to calibrate the damage threshold dose at these wavelengths and performed a comparative analysis of the recruitment of DNA repair factors xeroderma pigmentosum complementation group C (XPC) and Nijmegen breakage syndrome 1 (Nbs1). Our results show that two-photon-induced photochemical CPD generation dominates at 515 nm, while electron-mediated damage dominates at wavelengths ≥620 nm. The recruitment analysis revealed a cross talk between nucleotide excision and homologous recombination DNA repair pathways at 515 nm. Numerical simulations predicted electron densities and electron energy spectra, which govern the yield functions of a variety of direct electron-mediated DNA damage pathways and of indirect damage by
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