The Cell Cycle G2/M Block Is an Indicator of Cellular Radiosensitivity.
G2/M block
ionizing radiation
melanoma and squamous cell carcinoma
precision medicine
radiosensitivity
Journal
Dose-response : a publication of International Hormesis Society
ISSN: 1559-3258
Titre abrégé: Dose Response
Pays: United States
ID NLM: 101308899
Informations de publication
Date de publication:
Historique:
received:
23
09
2019
revised:
28
10
2019
accepted:
29
10
2019
entrez:
17
12
2019
pubmed:
17
12
2019
medline:
17
12
2019
Statut:
epublish
Résumé
Determination of the radiosensitivity of a specific tumor is essential to its precision tumor radiotherapy, but the measurement of cellular radiosensitivity with a routine colony forming assay is both labor- and time-consuming. An alternative option allowing rapid and precise prediction of radiosensitivity is necessary. In this study, we exposed 4 in vitro cultured cell lines to various doses of X-rays or carbon ions and then measured their radiosensitivities with a routine colony-forming assay, and monitored the kinetics of cell cycle distribution with routine propidium iodine staining and flow cytometry. Based on the results, we correlated cellular radiosensitivity with a dynamic assay of cell cycle distribution, specifically, the negative correlation of cellular radiosensitivity with the accumulated G2/M arrested cells at 48 hours after exposure. The higher the proportion of accumulated G2/M arrested cells at 48 hours after exposure, the lower the radiosensitivity of the cell line, that is, the higher radioresistance of the cell line. These findings provide an optional application of regular cell cycle analysis for the prediction of tumor radiosensitivity.
Sections du résumé
BACKGROUND
BACKGROUND
Determination of the radiosensitivity of a specific tumor is essential to its precision tumor radiotherapy, but the measurement of cellular radiosensitivity with a routine colony forming assay is both labor- and time-consuming. An alternative option allowing rapid and precise prediction of radiosensitivity is necessary.
METHODS
METHODS
In this study, we exposed 4 in vitro cultured cell lines to various doses of X-rays or carbon ions and then measured their radiosensitivities with a routine colony-forming assay, and monitored the kinetics of cell cycle distribution with routine propidium iodine staining and flow cytometry.
RESULTS
RESULTS
Based on the results, we correlated cellular radiosensitivity with a dynamic assay of cell cycle distribution, specifically, the negative correlation of cellular radiosensitivity with the accumulated G2/M arrested cells at 48 hours after exposure. The higher the proportion of accumulated G2/M arrested cells at 48 hours after exposure, the lower the radiosensitivity of the cell line, that is, the higher radioresistance of the cell line.
CONCLUSION
CONCLUSIONS
These findings provide an optional application of regular cell cycle analysis for the prediction of tumor radiosensitivity.
Identifiants
pubmed: 31839758
doi: 10.1177/1559325819891008
pii: 10.1177_1559325819891008
pmc: PMC6902394
doi:
Types de publication
Journal Article
Langues
eng
Pagination
1559325819891008Informations de copyright
© The Author(s) 2019.
Déclaration de conflit d'intérêts
Declaration of Conflicting Interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
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