Genome-wide linkage scan of nonsyndromic orofacial clefting in 91 families of central European origin

American Journal of Medical Genetics. Part a
Elisabeth MangoldAmalia Diaz Lacava

Abstract

Orofacial clefts are among the most common of all congenital disorders. Nonsyndromic cases of cleft lip with or without cleft palate (NSCL/P) and cleft palate only (NSCPO) are considered to have a multifactorial etiology which involves both genetic and environmental factors. We present the results of a genome-wide linkage scan in 91 families of central European descent with nonsyndromic orofacial clefts (NSC). The sample included 74 NSCL/P families, 15 NSCPO families, and 2 mixed families (a total of 217 affected and 230 unaffected individuals were genotyped). We genotyped 542 microsatellite markers (average intermarker distance = 6.9 cM). Multipoint nonparametric linkage analysis was performed using Allegro 2.0f. In addition to the factors investigated in previous genome-wide linkage analyses, we searched for sex-specific susceptibility loci, loci demonstrating parental imprinting and loci that are shared by NSCL/P and NSCPO. Several genomic regions likely to contain susceptibility loci for NSC were identified at the level of nominal significance. Some of these overlap with regions identified in previous studies. Suggestive evidence of linkage was obtained for the loci 4q21-q26 and 1p31-p21, with the chromosome 1 locus showing...Continue Reading

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Citations

Jun 19, 2012·Annual Review of Genomics and Human Genetics·Mary L Marazita
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