Response of V79 cells to low doses of X-rays and negative pi-mesons: clonogenic survival and DNA strand breaks.

2.50
Hdl Handle:
http://hdl.handle.net/10541/95840
Title:
Response of V79 cells to low doses of X-rays and negative pi-mesons: clonogenic survival and DNA strand breaks.
Authors:
Marples, Brian; Adomat, H; Koch, C J; Skov, K A
Abstract:
Mammalian cells are hypersensitive to very low doses of X-rays (< 0.2 Gy), a response which is followed by increased radioresistance up to 1 Gy. Increased radioresistance is postulated to be a response to DNA damage, possibly single-strand breaks, and it appears to be a characteristic of low linear energy transfer (LET) radiation. Here we demonstrate a correspondence between the extent of the increased radioresistance and linear energy transfer of 250 kVp X-rays and plateau and Bragg peak negative pi-mesons. The results support our hypothesis since the size of the increased radioresistant response appears to correspond to the number of radiation induced single-strand breaks. Furthermore, since survival prior to the increased radioresistant response (< 0.2 Gy) was LET-independent, these data support the notion that the increased radioresistant response may dictate the overall survival response to higher doses. However, while these data provide further circumstantial evidence for the involvement of DNA strand breaks in the triggering of increased radioresistance, more direct conclusions cannot be made. The data are not accurate enough to detect structure in the single-strand break profiles, the production of single-strand breaks being apparently linear with dose.
Affiliation:
Medical Biophysics, BC Cancer Research Centre, Vancouver, Canada.
Citation:
Response of V79 cells to low doses of X-rays and negative pi-mesons: clonogenic survival and DNA strand breaks. 1996, 70 (4):429-36 Int. J. Radiat. Biol.
Journal:
International Journal of Radiation Biology
Issue Date:
Oct-1996
URI:
http://hdl.handle.net/10541/95840
DOI:
10.1080/095530096144905
PubMed ID:
8862454
Type:
Article
Language:
en
ISSN:
0955-3002
Appears in Collections:
All Paterson Institute for Cancer Research

Full metadata record

DC FieldValue Language
dc.contributor.authorMarples, Brianen
dc.contributor.authorAdomat, Hen
dc.contributor.authorKoch, C Jen
dc.contributor.authorSkov, K Aen
dc.date.accessioned2010-04-07T10:18:03Z-
dc.date.available2010-04-07T10:18:03Z-
dc.date.issued1996-10-
dc.identifier.citationResponse of V79 cells to low doses of X-rays and negative pi-mesons: clonogenic survival and DNA strand breaks. 1996, 70 (4):429-36 Int. J. Radiat. Biol.en
dc.identifier.issn0955-3002-
dc.identifier.pmid8862454-
dc.identifier.doi10.1080/095530096144905-
dc.identifier.urihttp://hdl.handle.net/10541/95840-
dc.description.abstractMammalian cells are hypersensitive to very low doses of X-rays (< 0.2 Gy), a response which is followed by increased radioresistance up to 1 Gy. Increased radioresistance is postulated to be a response to DNA damage, possibly single-strand breaks, and it appears to be a characteristic of low linear energy transfer (LET) radiation. Here we demonstrate a correspondence between the extent of the increased radioresistance and linear energy transfer of 250 kVp X-rays and plateau and Bragg peak negative pi-mesons. The results support our hypothesis since the size of the increased radioresistant response appears to correspond to the number of radiation induced single-strand breaks. Furthermore, since survival prior to the increased radioresistant response (< 0.2 Gy) was LET-independent, these data support the notion that the increased radioresistant response may dictate the overall survival response to higher doses. However, while these data provide further circumstantial evidence for the involvement of DNA strand breaks in the triggering of increased radioresistance, more direct conclusions cannot be made. The data are not accurate enough to detect structure in the single-strand break profiles, the production of single-strand breaks being apparently linear with dose.en
dc.language.isoenen
dc.subject.meshAnimals-
dc.subject.meshCell Survival-
dc.subject.meshCells, Cultured-
dc.subject.meshClone Cells-
dc.subject.meshCricetinae-
dc.subject.meshCricetulus-
dc.subject.meshDNA-
dc.subject.meshDNA Damage-
dc.subject.meshDose-Response Relationship, Radiation-
dc.subject.meshFibroblasts-
dc.subject.meshLinear Energy Transfer-
dc.subject.meshMesons-
dc.subject.meshRadiation Tolerance-
dc.subject.meshX-Rays-
dc.titleResponse of V79 cells to low doses of X-rays and negative pi-mesons: clonogenic survival and DNA strand breaks.en
dc.typeArticleen
dc.contributor.departmentMedical Biophysics, BC Cancer Research Centre, Vancouver, Canada.en
dc.identifier.journalInternational Journal of Radiation Biologyen
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