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Genome wide study of maternal and parent-of-origin effects on the etiology of orofacial clefts
Journal article   Open access   Peer reviewed

Genome wide study of maternal and parent-of-origin effects on the etiology of orofacial clefts

Min Shi, Jeffrey C Murray, Mary L Marazita, Ronald G Munger, Ingo Ruczinski, Jacqueline B Hetmanski, Tao Wu, Tanda Murray, Richard J Redett, Allen J Wilcox, …
American journal of medical genetics. Part A, Vol.158A(4), pp.784-794
04/2012
DOI: 10.1002/ajmg.a.35257
PMCID: PMC3617127
PMID: 22419666
url
https://www.ncbi.nlm.nih.gov/pmc/articles/3617127View
Open Access

Abstract

We performed a genome wide association analysis of maternally-mediated genetic effects and parent-of-origin effects on risk of orofacial clefting using over 2,000 case-parent triads collected through an international cleft consortium. We used log-linear regression models to test individual SNPs. For SNPs with a p-value <10 −5 for maternal genotypic effects, we also applied a haplotype-based method, TRIMM, to extract potential information from clusters of correlated SNPs. None of the SNPs were significant at the genome wide level. Our results suggest neither maternal genome nor parent of origin effects play major roles in the etiology of orofacial clefting in our sample. This finding is consistent with previous genetic studies and recent population-based cohort studies in Norway and Denmark, which showed no apparent difference between mother-to-offspring and father-to-offspring recurrence of clefting. We, however, cannot completely rule out maternal genome or parent of origin effects as risk factors because very small effects might not be detectable with our sample size, they may influence risk through interactions with environmental exposures or may act through a more complex network of interacting genes. Thus the most promising SNPs identified by this study may still be worth further investigation.
P GWAS association study maternal genes CL family-based study CP parent-of-origin

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