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Low levels of ATM in breast cancer patients with clinical radiosensitivity by Zhiming Fang; Sergei Kozlov; Michael J McKay; Rick Woods; Geoff Birrell; Carl N Sprung; Dédée F Murrell; Kiran Wangoo; Linda Teng; John H Kearsley; Martin F Lavin; Peter H Graham; Raymond A Clarke is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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## Background and Purpose Adjuvant radiotherapy for cancer can result in severe adverse side effects for normal tissues. In this respect, individuals with anomalies of the ATM (ataxia telangiectasia) protein/gene are of particular interest as they may be at risk of both breast cancer and clinical radiosensitivity. The association of specific ATM gene mutations with these pathologies has been well documented, however, there is uncertainty regarding pathological thresholds for the ATM protein. ## Results Semi-quantitative immuno-blotting provided a reliable and reproducible method to compare levels of the ATM protein for a rare cohort of 20 cancer patients selected on the basis of their severe adverse normal tissue reactions to radiotherapy. We found that 4/12 (33%) of the breast cancer patients with severe adverse normal tissue reactions following radiotherapy had ATM protein levels < 55% compared to the mean for non-reactor controls. ## Conclusions ATM mutations are generally considered low risk alleles for breast cancer and clinical radiosensitivity. From results reported here we propose a tentative ATM protein threshold of ~55% for high-risk of clinical radiosensitivity for breas

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Author

Zhiming Fang; Sergei Kozlov; Michael J McKay; Rick Woods; Geoff Birrell; Carl N Sprung; Dédée F Murrell; Kiran Wangoo; Linda Teng; John H Kearsley; Martin F Lavin; Peter H Graham; Raymond A Clarke

Publisher

BioMed Central; Medknow Publications; Wolters Kluwer Medknow Publications; London: BioMed Central; Springer Science and Business Media LLC; Medknow (ISSN 2041-9414)

Published

2010

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)