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dc.contributor.authorMitchell, Erika L D
dc.contributor.authorScott, David
dc.date.accessioned2010-04-01T13:45:09Z
dc.date.available2010-04-01T13:45:09Z
dc.date.issued1997-10
dc.identifier.citationG2 chromosomal radiosensitivity in fibroblasts of ataxia-telangiectasia heterozygotes and a Li-Fraumeni syndrome patient with radioresistant cells. 1997, 72 (4):435-8 Int. J. Radiat. Biol.en
dc.identifier.issn0955-3002
dc.identifier.pmid9343108
dc.identifier.urihttp://hdl.handle.net/10541/95495
dc.description.abstractPURPOSE: To investigate whether the good discrimination we previously observed between ataxia-telangiectasia (A-T) heterozygotes and normal donors for induction of chromosome aberrations by X-rays in G2 lymphocytes is also seen in G2 fibroblasts. Also to investigate the G2 radiosensitivity of a patient with the cancer-prone Li-Fraumeni syndrome (LFS) whose fibroblasts are resistant to the lethal effects of radiation. MATERIALS AND METHODS: Fibroblasts were exposed to 0.5 Gy X-rays and harvested for metaphase analysis 90 min later. RESULTS: Four A-T heterozygote cell strains were all more sensitive than seven normal controls. The LFS strain with a germline TP53 mutation was twice as sensitive as the mean control value. CONCLUSIONS: Although chromosomal, radiosensitivity is seen in A-T heterozygotes and LFS cells, the former are radiosensitive and the latter radioresistant to cell killing. Repair defects may predominate in A-T heterozygotes, inadequate genome surveillance in LFS cells.
dc.language.isoenen
dc.subject.meshAtaxia Telangiectasia
dc.subject.meshChromosome Aberrations
dc.subject.meshChromosomes, Human
dc.subject.meshFibroblasts
dc.subject.meshG2 Phase
dc.subject.meshHeterozygote
dc.subject.meshHumans
dc.subject.meshLi-Fraumeni Syndrome
dc.subject.meshRadiation Tolerance
dc.titleG2 chromosomal radiosensitivity in fibroblasts of ataxia-telangiectasia heterozygotes and a Li-Fraumeni syndrome patient with radioresistant cells.en
dc.typeArticleen
dc.contributor.departmentCRC Department of Cancer Genetics, Paterson Institute for Cancer Research, Christie Hospital NHS Trust, Withington, Manchester, UK.en
dc.identifier.journalInternational Journal of Radiation Biologyen
html.description.abstractPURPOSE: To investigate whether the good discrimination we previously observed between ataxia-telangiectasia (A-T) heterozygotes and normal donors for induction of chromosome aberrations by X-rays in G2 lymphocytes is also seen in G2 fibroblasts. Also to investigate the G2 radiosensitivity of a patient with the cancer-prone Li-Fraumeni syndrome (LFS) whose fibroblasts are resistant to the lethal effects of radiation. MATERIALS AND METHODS: Fibroblasts were exposed to 0.5 Gy X-rays and harvested for metaphase analysis 90 min later. RESULTS: Four A-T heterozygote cell strains were all more sensitive than seven normal controls. The LFS strain with a germline TP53 mutation was twice as sensitive as the mean control value. CONCLUSIONS: Although chromosomal, radiosensitivity is seen in A-T heterozygotes and LFS cells, the former are radiosensitive and the latter radioresistant to cell killing. Repair defects may predominate in A-T heterozygotes, inadequate genome surveillance in LFS cells.


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