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De Novo Mutations in Ataxin-2 Gene and ALS Risk

Author

Listed:
  • José Miguel Laffita-Mesa
  • Jorge Michel Rodríguez Pupo
  • Raciel Moreno Sera
  • Yaimee Vázquez Mojena
  • Vivian Kourí
  • Leonides Laguna-Salvia
  • Michael Martínez-Godales
  • José A Valdevila Figueira
  • Peter O Bauer
  • Roberto Rodríguez-Labrada
  • Yanetza González Zaldívar
  • Martin Paucar
  • Per Svenningsson
  • Luís Velázquez Pérez

Abstract

Pathogenic CAG repeat expansion in the ataxin-2 gene (ATXN2) is the genetic cause of spinocerebellar ataxia type 2 (SCA2). Recently, it has been associated with Parkinsonism and increased genetic risk for amyotrophic lateral sclerosis (ALS). Here we report the association of de novo mutations in ATXN2 with autosomal dominant ALS. These findings support our previous conjectures based on population studies on the role of large normal ATXN2 alleles as the source for new mutations being involved in neurodegenerative pathologies associated with CAG expansions. The de novo mutations expanded from ALS/SCA2 non-risk alleles as proven by meta-analysis method. The ALS risk was associated with SCA2 alleles as well as with intermediate CAG lengths in the ATXN2. Higher risk for ALS was associated with pathogenic CAG repeat as revealed by meta-analysis.

Suggested Citation

  • José Miguel Laffita-Mesa & Jorge Michel Rodríguez Pupo & Raciel Moreno Sera & Yaimee Vázquez Mojena & Vivian Kourí & Leonides Laguna-Salvia & Michael Martínez-Godales & José A Valdevila Figueira & Pet, 2013. "De Novo Mutations in Ataxin-2 Gene and ALS Risk," PLOS ONE, Public Library of Science, vol. 8(8), pages 1-13, August.
    • Handle: RePEc:plo:pone00:0070560
    DOI: 10.1371/journal.pone.0070560
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    References listed on IDEAS

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    1. Andrew C. Elden & Hyung-Jun Kim & Michael P. Hart & Alice S. Chen-Plotkin & Brian S. Johnson & Xiaodong Fang & Maria Armakola & Felix Geser & Robert Greene & Min Min Lu & Arun Padmanabhan & Dana Clay-, 2010. "Ataxin-2 intermediate-length polyglutamine expansions are associated with increased risk for ALS," Nature, Nature, vol. 466(7310), pages 1069-1075, August.
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    Cited by:

    1. Ming-Dong Wang & James Gomes & Neil R Cashman & Julian Little & Daniel Krewski, 2014. "Intermediate CAG Repeat Expansion in the ATXN2 Gene Is a Unique Genetic Risk Factor for ALS−A Systematic Review and Meta-Analysis of Observational Studies," PLOS ONE, Public Library of Science, vol. 9(8), pages 1-9, August.

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