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ATM gene and lymphoid malignancies.

F Gumy-Pause1, P Wacker, A-P Sappino

  • 1Department of Pediatrics, Hematology/Oncology Unit, University Hospital of Geneva, Switzerland. Fabienne.GumyPause@medecine.unige.ch

Leukemia
|November 25, 2003
PubMed
Summary

Mutations in the ATM gene are linked to ataxia-telangiectasia and increase the risk of lymphoid cancers. This review examines ATM gene alterations in sporadic lymphoid tumors, noting differences from ataxia-telangiectasia mutations.

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Area of Science:

  • Genetics
  • Oncology
  • Molecular Biology

Background:

  • Inherited mutations in the ATM gene cause ataxia-telangiectasia, a disorder linked to increased childhood leukemia and lymphoma.
  • ATM gene alterations are frequently observed in sporadic lymphoid tumors, suggesting its role in lymphomagenesis.
  • Loss of heterozygosity at 11q22-23, the ATM gene locus, is common in sporadic lymphoid malignancies.

Purpose of the Study:

  • To review recent data on the ATM gene in sporadic lymphoid malignancies.
  • To discuss the role of ATM gene alterations in the pathogenesis of lymphoid tumors.
  • To explore the contrasting mutation types (nonsense vs. missense) in ataxia-telangiectasia and sporadic lymphoid tumors.

Main Methods:

  • Literature review of published studies on ATM gene alterations.
  • Analysis of mutation prevalence in ataxia-telangiectasia and sporadic lymphoid disorders.
  • Comparative analysis of mutation types (nonsense and missense) in different disease contexts.

Main Results:

  • ATM gene alterations are prevalent in various sporadic lymphoproliferative disorders.
  • Loss of heterozygosity at the ATM locus is a frequent event in sporadic lymphoid tumors.
  • A higher proportion of missense alterations in ATM are found in sporadic lymphoid tumors compared to nonsense mutations in ataxia-telangiectasia.

Conclusions:

  • The ATM gene plays a significant role in the pathogenesis of sporadic lymphoid malignancies.
  • The distinct mutation profiles in ataxia-telangiectasia and sporadic lymphoid tumors warrant further investigation.
  • Understanding ATM gene alterations is crucial for comprehending lymphomagenesis.

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