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ATM and the molecular pathogenesis of ataxia telangiectasia

Peter J McKinnon1

  • 1Department of Genetics, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. peter.mckinnon@stjude.org

Annual Review of Pathology
|November 1, 2011
PubMed

Insights

Ataxia telangiectasia (A-T) stems from ATM protein kinase loss, impacting DNA-damage signaling. This defect is crucial for understanding neurodegeneration in A-T and related DNA-repair deficiency disorders.

Area of Science:

  • Genetics and Molecular Biology
  • Neuroscience
  • Cellular Biology

Background:

  • Ataxia telangiectasia (A-T) is caused by the inactivation of the ATM protein kinase.
  • ATM plays a critical role in DNA-damage signaling, essential for maintaining tissue homeostasis.
  • Understanding ATM's primary functions is key to preventing A-T pathology, particularly its neurodegenerative aspects.

Purpose of the Study:

  • To elucidate the role of ATM protein kinase in DNA-damage signaling and its implications for neurodegeneration in A-T.
  • To explore how ATM loss contributes to the degenerative effects observed in the nervous system.
  • To connect insights from A-T with other DNA-repair deficiency syndromes to understand neurodegeneration.

Main Methods:

  • Review of existing literature on ATM biochemistry and cell biology.
  • Analysis of phenotypic similarities between A-T and other neurodegenerative diseases linked to DNA-repair deficiencies.
  • Focus on defective DNA-damage signaling as a central mechanism.

Main Results:

  • Defective DNA-damage signaling due to ATM inactivation is identified as the primary cause of A-T.
  • ATM loss leads to neurodegenerative effects, highlighting the nervous system's vulnerability.
  • Shared mechanisms of neurodegeneration exist across A-T and related DNA-repair disorders.

Conclusions:

  • Failure to appropriately respond to DNA damage is a direct cause of neurodegeneration in A-T.
  • ATM's role in DNA-damage signaling is fundamental to preventing A-T-related neurodegeneration.
  • Studying ATM and related disorders provides critical insights into the molecular basis of neurodegeneration.

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