ArticleJournal of radiation research2024
Detection of genome instability by 53BP1 expression as a long-lasting health effect in human epidermis surrounding radiation-induced skin cancers.
Article in Journal of radiation research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Mechanistic Perspectives on Radiation-Induced Skin Injury and the Protective Effects of Berberine.Journal of inflammation research · 2025Article
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6 authors.
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Abstract
We previously reported endogenous activation of the DNA damage response (DDR) in the epidermis surrounding basal cell carcinoma resected from Nagasaki atomic bomb survivors, suggesting the presence of genomic instability (GIN) in the survivors as a late effect of radiation. Dual-color immunofluorescence (IF) analysis of TP53-binding protein-1 (53BP1) and a proliferative indicator, Ki-67, to elucidate GIN in tumor tissues revealed that abnormal 53BP1 expression is closely associated with carcinogenesis in several organs. The present study aimed to confirm the presence of radiation-induced GIN in the non-neoplastic epidermis of patients with radiation-induced skin cancer. Formalin-fixed paraffin-embedded tissues were obtained from all participants between 2008 and 2019 at the Nagasaki University Hospital. 53BP1 nuclear expression was examined using dual-color IF analysis with Ki-67 expression to assess the extent and integrity of the DDR. Expressions of gamma-H2AX, p53 and p21 were also analyzed using the dual-color IF analysis for their association with 53BP1. The results of this study provide evidence for sporadic activation of the DDR in medically irradiated and ultraviolet-exposed epidermis as a long-lasting radiation effect, which is a predisposition to skin cancer. Furthermore, the incidence of abnormal 53BP1 expression in cancer cells was higher than in non-neoplastic epidermal cells surrounding cancer, suggesting a correlation between the type of 53BP1 and the malignant potential of skin tumors. This study highlights the usefulness of dual-color IF for 53BP1 (and Ki-67) as an indicator to estimate the level of GIN as a long-lasting health effect of radiation exposure.
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