Variants of the elongator protein 3 (ELP3) gene are associated with motor neuron degeneration
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Horvitz_Variants of.pdf
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Author(s)
Horvitz, Howard Robert
Date Issued
November 2008
Journal
Human Molecular Genetics
Publisher
Oxford University Press
Citation
Simpson, C. L. et al. “Variants of the Elongator Protein 3 (ELP3) Gene Are Associated with Motor Neuron Degeneration.” Human Molecular Genetics 18.3 (2008) : 472-481.
Version
Final published version
Abstract
Amyotrophic lateral sclerosis (ALS) is a spontaneous, relentlessly progressive motor neuron disease, usually resulting in death from respiratory failure within 3 years. Variation in the genes SOD1 and TARDBP accounts for a small percentage of cases, and other genes have shown association in both candidate gene and genome-wide studies, but the genetic causes remain largely unknown. We have performed two independent parallel studies, both implicating the RNA polymerase II component, ELP3, in axonal biology and neuronal degeneration. In the first, an association study of 1884 microsatellite markers, allelic variants of ELP3 were associated with ALS in three human populations comprising 1483 people (P = 1.96 × 10−9). In the second, an independent mutagenesis screen in Drosophila for genes important in neuronal communication and survival identified two different loss of function mutations, both in ELP3 (R475K and R456K). Furthermore, knock down of ELP3 protein levels using antisense morpholinos in zebrafish embryos resulted in dose-dependent motor axonal abnormalities [Pearson correlation: −0.49, P = 1.83 × 10−12 (start codon morpholino) and −0.46, P = 4.05 × 10−9 (splice-site morpholino), and in humans, risk-associated ELP3 genotypes correlated with reduced brain ELP3 expression (P = 0.01). These findings add to the growing body of evidence implicating the RNA processing pathway in neurodegeneration and suggest a critical role for ELP3 in neuron biology and of ELP3 variants in ALS.
MIT Department
Massachusetts Institute of Technology. Department of Biology
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Creative Commons Attribution Noncommercial
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DOI of Published Version
https://doi.org/10.1093/hmg/ddn375
