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Severe reaction to radiotherapy for breast cancer as the presenting feature of ataxia telangiectasia

BACKGROUND: Severe early and late radiation reaction to radiotherapy is extremely rare in breast cancer patients. Such a reaction prompted an investigation into a 44-year-old mother (patient A-T213). METHODS: A neurological examination was performed and blood lymphocytes and skin fibroblasts were as...

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Autores principales: Byrd, P J, Srinivasan, V, Last, J I, Smith, A, Biggs, P, Carney, E F, Exley, A, Abson, C, Stewart, G S, Izatt, L, Taylor, A M
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3261689/
https://www.ncbi.nlm.nih.gov/pubmed/22146522
http://dx.doi.org/10.1038/bjc.2011.534
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author Byrd, P J
Srinivasan, V
Last, J I
Smith, A
Biggs, P
Carney, E F
Exley, A
Abson, C
Stewart, G S
Izatt, L
Taylor, A M
author_facet Byrd, P J
Srinivasan, V
Last, J I
Smith, A
Biggs, P
Carney, E F
Exley, A
Abson, C
Stewart, G S
Izatt, L
Taylor, A M
author_sort Byrd, P J
collection PubMed
description BACKGROUND: Severe early and late radiation reaction to radiotherapy is extremely rare in breast cancer patients. Such a reaction prompted an investigation into a 44-year-old mother (patient A-T213). METHODS: A neurological examination was performed and blood lymphocytes and skin fibroblasts were assessed for radiosensitivity chromosomally and by colony-forming assay. The ATM gene was sequenced and ATM mutations modelled by site-directed mutagenesis. The ATM kinase activity was also assessed. RESULTS: Patient A-T213 was normally ambulant with no ataxia and minimal other neurological features. T lymphocytes and skin fibroblasts were unusually radiosensitive, although less sensitive than in classical ataxia telangiectasia (A-T). A lymphoblastoid cell line and skin fibroblasts expressed ATM protein with some retained kinase activity. One missense ATM mutation c.8672G>A (p.Gly2891Asp) and a c.1A>G substitution were identified. In the modelling system, the p.Gly2891Asp mutant protein was expressed and shown to have residual ATM kinase activity. CONCLUSION: Patient A-T213 has a milder form of A-T with biallelic ATM mutations, which may have contributed to breast cancer development, and certainly caused the severe radiation reaction. Ataxia telangiectasia should be investigated as a potential cause of untoward severe early and late radiation reactions in breast cancer patients.
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spelling pubmed-32616892012-01-19 Severe reaction to radiotherapy for breast cancer as the presenting feature of ataxia telangiectasia Byrd, P J Srinivasan, V Last, J I Smith, A Biggs, P Carney, E F Exley, A Abson, C Stewart, G S Izatt, L Taylor, A M Br J Cancer Clinical Study BACKGROUND: Severe early and late radiation reaction to radiotherapy is extremely rare in breast cancer patients. Such a reaction prompted an investigation into a 44-year-old mother (patient A-T213). METHODS: A neurological examination was performed and blood lymphocytes and skin fibroblasts were assessed for radiosensitivity chromosomally and by colony-forming assay. The ATM gene was sequenced and ATM mutations modelled by site-directed mutagenesis. The ATM kinase activity was also assessed. RESULTS: Patient A-T213 was normally ambulant with no ataxia and minimal other neurological features. T lymphocytes and skin fibroblasts were unusually radiosensitive, although less sensitive than in classical ataxia telangiectasia (A-T). A lymphoblastoid cell line and skin fibroblasts expressed ATM protein with some retained kinase activity. One missense ATM mutation c.8672G>A (p.Gly2891Asp) and a c.1A>G substitution were identified. In the modelling system, the p.Gly2891Asp mutant protein was expressed and shown to have residual ATM kinase activity. CONCLUSION: Patient A-T213 has a milder form of A-T with biallelic ATM mutations, which may have contributed to breast cancer development, and certainly caused the severe radiation reaction. Ataxia telangiectasia should be investigated as a potential cause of untoward severe early and late radiation reactions in breast cancer patients. Nature Publishing Group 2012-01-17 2011-12-06 /pmc/articles/PMC3261689/ /pubmed/22146522 http://dx.doi.org/10.1038/bjc.2011.534 Text en Copyright © 2012 Cancer Research UK https://creativecommons.org/licenses/by-nc-sa/3.0/This work is licensed under the Creative Commons Attribution-NonCommercial-Share Alike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
spellingShingle Clinical Study
Byrd, P J
Srinivasan, V
Last, J I
Smith, A
Biggs, P
Carney, E F
Exley, A
Abson, C
Stewart, G S
Izatt, L
Taylor, A M
Severe reaction to radiotherapy for breast cancer as the presenting feature of ataxia telangiectasia
title Severe reaction to radiotherapy for breast cancer as the presenting feature of ataxia telangiectasia
title_full Severe reaction to radiotherapy for breast cancer as the presenting feature of ataxia telangiectasia
title_fullStr Severe reaction to radiotherapy for breast cancer as the presenting feature of ataxia telangiectasia
title_full_unstemmed Severe reaction to radiotherapy for breast cancer as the presenting feature of ataxia telangiectasia
title_short Severe reaction to radiotherapy for breast cancer as the presenting feature of ataxia telangiectasia
title_sort severe reaction to radiotherapy for breast cancer as the presenting feature of ataxia telangiectasia
topic Clinical Study
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3261689/
https://www.ncbi.nlm.nih.gov/pubmed/22146522
http://dx.doi.org/10.1038/bjc.2011.534
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