ArticleMolecular and cellular biochemistry2020
dSTORM microscopy evidences in HeLa cells clustered and scattered γH2AX nanofoci sensitive to ATM, DNA-PK, and ATR kinase inhibitors.
Article in Molecular and cellular biochemistry, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 7 citations in OpenAlex.
- The effects of carbon-ion beam irradiation on three-dimensional in vitro models of normal oral mucosa and oral cancer: development of a novel tool to evaluate cancer therapy.In vitro cellular & developmental biology. Animal · 2024Article
- Chromatin Organization after High-LET Irradiation Revealed by Super-Resolution STED Microscopy.International journal of molecular sciences · 2024Article
- Analysis of Ionizing Radiation Induced DNA Damage by Superresolution dSTORM Microscopy.Pathology oncology research : POR · 2021Article
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6 authors at 2 institutions in 2 countries.
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Abstract
In response to DNA double-strand breaks (DSB), histone H2AX is phosphorylated around the lesion by a feed forward signal amplification loop, originating γH2AX foci detectable by immunofluorescence and confocal microscopy as elliptical areas of uniform intensity. We exploited the significant increase in resolution (~ × 10) provided by single-molecule localization microscopy (SMLM) to investigate at nanometer scale the distribution of γH2AX signals either endogenous (controls) or induced by the radiomimetic bleomycin (BLEO) in HeLa cells. In both conditions, clustered substructures (nanofoci) confined to γH2AX foci and scattered nanofoci throughout the remnant nuclear area were detected. SR-Tesseler software (Voronoï tessellation-based segmentation) was combined with a custom Python script to first separate clustered nanofoci inside γH2AX foci from scattered nanofoci, and then to perform a cluster analysis upon each nanofoci type. Compared to controls, γH2AX foci in BLEO-treated nuclei presented on average larger areas (0.41 versus 0.19 µm
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