Identification of candidate genes for dyslexia susceptibility on chromosome 18

Thomas S. Scerri, Silvia Paracchini, Andrew Morris, I. Laurence MacPhie, Joel Talcott, John Stein, Shelley D. Smith, Bruce F. Pennington, Richard K. Olson, John C. deFries, Anthony P. Monaco

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

Background: Six independent studies have identified linkage to chromosome 18 for developmental dyslexia or general reading ability. Until now, no candidate genes have been identified to explain this linkage. Here, we set out to identify the gene(s) conferring susceptibility by a two stage strategy of linkage and association analysis. Methodology/Principal Findings: Linkage analysis: 264 UK families and 155 US families each containing at least one child diagnosed with dyslexia were genotyped with a dense set of microsatellite markers on chromosome 18. Association analysis: Using a discovery sample of 187 UK families, nearly 3000 SNPs were genotyped across the chromosome 18 dyslexia susceptibility candidate region. Following association analysis, the top ranking SNPs were then genotyped in the remaining samples. The linkage analysis revealed a broad signal that spans approximately 40 Mb from 18p11.2 to 18q12.2. Following the association analysis and subsequent replication attempts, we observed consistent association with the same SNPs in three genes; melanocortin 5 receptor (MC5R), dymeclin (DYM) and neural precursor cell expressed, developmentally downregulated 4-like (NEDD4L). Conclusions: Along with already published biological evidence, MC5R, DYM and NEDD4L make attractive candidates for dyslexia susceptibility genes. However, further replication and functional studies are still required.

Original languageEnglish (US)
Article numbere13712
JournalPloS one
Volume5
Issue number10
DOIs
StatePublished - 2010

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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    Scerri, T. S., Paracchini, S., Morris, A., MacPhie, I. L., Talcott, J., Stein, J., Smith, S. D., Pennington, B. F., Olson, R. K., deFries, J. C., & Monaco, A. P. (2010). Identification of candidate genes for dyslexia susceptibility on chromosome 18. PloS one, 5(10), [e13712]. https://doi.org/10.1371/journal.pone.0013712