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The role of ATM in breast cancer development

Jana Prokopcova1, Zdenek Kleibl, Claire M Banwell

  • 1Department of Biochemistry and Experimental Oncology, First Faculty of Medicine, Charles University, Prague, Czech Republic. jproko@lf1.cuni.cz

Breast Cancer Research and Treatment
|October 25, 2006
PubMed

Insights

Individuals with mutations in the ataxia telangiectasia mutated (ATM) gene may face a higher risk of breast cancer. Research suggests ATM heterozygotes exhibit increased sensitivity to DNA damage, linking them to elevated cancer susceptibility.

Area of Science:

  • Genetics
  • Oncology
  • DNA Repair

Background:

  • DNA damage sensing and repair are critical for preventing cancer.
  • The ataxia telangiectasia mutated (ATM) protein kinase is vital for responding to DNA double-strand breaks.
  • Mutations in the ATM gene cause ataxia telangiectasia (AT), a syndrome linked to increased cancer risk.

Purpose of the Study:

  • To investigate the association between ATM gene mutations and breast cancer risk.
  • To explore the role of ATM heterozygosity in cancer predisposition.
  • To consolidate evidence supporting an increased breast cancer risk in ATM heterozygotes.

Main Methods:

  • Review of epidemiological studies on AT relatives and breast cancer incidence.
  • In vitro analysis of DNA repair and radiosensitivity in heterozygous cells.
  • Clinical examination of ATM mutation frequency in high-risk breast cancer families.

Main Results:

  • Epidemiological data indicate a higher breast cancer risk in relatives of AT patients.
  • Cellular studies demonstrate hyperradiosensitivity in ATM heterozygous cells.
  • Clinical findings reveal an increased prevalence of ATM mutations in families with a history of breast cancer.

Conclusions:

  • ATM heterozygosity is increasingly recognized as a risk factor for breast cancer.
  • The cellular hyperradiosensitivity observed in heterozygotes supports their increased cancer susceptibility.
  • Further research into ATM's role in sporadic and familial breast cancer is warranted.

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