Strong Genetic Evidence of DCDC2 as a Susceptibility Gene for Dyslexia
We searched for linkage disequilibrium (LD) in 137 triads with dyslexia, using markers that span the most-replicated dyslexia susceptibility region on 6p21-p22, and found association between the disease and markers within the VMP/DCDC2/KAAG1 locus. Detailed refinement of the LD region, involving seq...
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Published in | American journal of human genetics Vol. 78; no. 1; pp. 52 - 62 |
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Main Authors | , , , , , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Chicago, IL
Elsevier Inc
01.01.2006
University of Chicago Press Cell Press The American Society of Human Genetics |
Subjects | |
Online Access | Get full text |
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Summary: | We searched for linkage disequilibrium (LD) in 137 triads with dyslexia, using markers that span the most-replicated dyslexia susceptibility region on 6p21-p22, and found association between the disease and markers within the
VMP/DCDC2/KAAG1 locus. Detailed refinement of the LD region, involving sequencing and genotyping of additional markers, showed significant association within
DCDC2 in single-marker and haplotype analyses. The association appeared to be strongest in severely affected patients. In a second step, the study was extended to include an independent sample of 239 triads with dyslexia, in which the association—in particular, with the severe phenotype of dyslexia—was confirmed. Our expression data showed that
DCDC2, which contains a doublecortin homology domain that is possibly involved in cortical neuron migration, is expressed in the fetal and adult CNS, which—together with the hypothesized protein function—is in accordance with findings in dyslexic patients with abnormal neuronal migration and maturation. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1 |
ISSN: | 0002-9297 1537-6605 |
DOI: | 10.1086/498992 |