ATM germline mutations in women with familial breast cancer and a relative with haematological malignancy.

Antonio Russo, Laura La Paglia, Laura La Paglia, Jérôme Champ, Eve Cavaciuti, Anthony Laugé, Jean-Louis Viovy, Dominique Stoppa-Lyonnet, Jérémie Weber

Risultato della ricerca: Articlepeer review

19 Citazioni (Scopus)

Abstract

Biallelic inactivation of the ATM gene causes ataxia-telangiectasia (A-T), a complex neurological disease associated with a high risk of leukaemias and lymphomas. Mothers of A-T children, obligate ATM heterozygote mutation carriers, have a breast cancer (BC) relative risk of about 3. The frequency of ATM carriers in BC women with a BC family history has been estimated to be 2.70%. To further our clinical understanding of familial BC and examine whether haematological malignancies are predictive of ATM germline mutation, we estimated the frequency of heterozygote mutation carriers in a series of 122 BC women with a family history of both BC and haematological malignancy and without BRCA1/2 mutation. The gene screening was performed with a new high throughput method, EMMA (enhanced mismatch mutation analysis). Amongst 28 different ATM variants, eight mutations have been identified in eight patients: two mutations leading to a putative truncated protein and six being likely deleterious mutations. One of the truncating mutations was initially interpreted as a missense mutation, p.Asp2597Tyr, but is actually a splice mutation (c.7789G>T/p.Asp2597_Lys2643>LysfsX3). The estimated frequency of ATM heterozygote mutation carriers in our series is 6.56% (95% CI: 2.16-10.95), a significantly higher figure than that observed in the general population, estimated to be between 0.3 and 0.6%. Although a trend towards an increased frequency of ATM carriers was observed, it was not different from that observed in a population of familial BC women not selected for haematological malignancy as the frequency of ATM carriers was 2.70%, a value situated in the confidence interval of our study.
Lingua originaleEnglish
Numero di pagine0
RivistaBreast Cancer Research and Treatment
Volume2009-04
Stato di pubblicazionePublished - 2009

All Science Journal Classification (ASJC) codes

  • Oncology
  • Cancer Research

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