Abstract
Collagen type VI is a candidate for a role in the pathogenesis of congenital heart defects (CHD) in Down's syndrome. Three restriction fragment length polymorphisms of the COL6A1 gene were used to determine COL6A1 genotypes in 50 families of affected children with trisomy 21 (29 with congenital heart defects and 21 without) and 37 unrelated volunteers. We found seven unusual genotypes in the parents of affected children with Down's syndrome, five being unique to the parents of children with trisomy 21 and CHD. There were no unusual genotypes associated with other chromosome 21 loci. No single COL6A1 genotype was associated with CHD. Thus, the unusual genotypes unique to parents of affected children suggest that genetic variation in the COL6A1 gene region contributes to the pathogenesis of CHD in Down's syndrome.
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Davies, G.E., Howard, C.M., Farrer, M.J. et al. Unusual genotypes in the COL6A1 gene in parents of children with trisomy 21 and major congenital heart defects. Hum Genet 93, 443–446 (1994). https://doi.org/10.1007/BF00201672
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DOI: https://doi.org/10.1007/BF00201672