Orofacial Cleft Risk Is Increased with Maternal Smoking and Specific Detoxification-Gene Variants

Maternal smoking is a recognized risk factor for orofacial clefts. Maternal or fetal pharmacogenetic variants are plausible modulators of this risk. In this work, we studied 5,427 DNA samples, including 1,244 from subjects in Denmark and Iowa with facial clefting and 4,183 from parents, siblings, or...

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Veröffentlicht in:American journal of human genetics 2007-01, Vol.80 (1), p.76-90
Hauptverfasser: Shi, Min, Christensen, Kaare, Weinberg, Clarice R., Romitti, Paul, Bathum, Lise, Lozada, Anthony, Morris, Richard W., Lovett, Michael, Murray, Jeffrey C.
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container_issue 1
container_start_page 76
container_title American journal of human genetics
container_volume 80
creator Shi, Min
Christensen, Kaare
Weinberg, Clarice R.
Romitti, Paul
Bathum, Lise
Lozada, Anthony
Morris, Richard W.
Lovett, Michael
Murray, Jeffrey C.
description Maternal smoking is a recognized risk factor for orofacial clefts. Maternal or fetal pharmacogenetic variants are plausible modulators of this risk. In this work, we studied 5,427 DNA samples, including 1,244 from subjects in Denmark and Iowa with facial clefting and 4,183 from parents, siblings, or unrelated population controls. We examined 25 single-nucleotide polymorphisms in 16 genes in pathways for detoxification of components of cigarette smoke, to look for evidence of gene-environment interactions. For genes identified as related to oral clefting, we studied gene-expression profiles in fetal development in the relevant tissues and time intervals. Maternal smoking was a significant risk factor for clefting and showed dosage effects, in both the Danish and Iowan data. Suggestive effects of variants in the fetal NAT2 and CYP1A1 genes were observed in both the Iowan and the Danish participants. In an expanded case set, NAT2 continued to show significant overtransmission of an allele to the fetus, with a final P value of .00003. There was an interaction between maternal smoking and fetal inheritance of a GSTT1-null deletion, seen in both the Danish ( P=.03) and Iowan ( P=.002) studies, with a Fisher’s combined P value of
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Maternal or fetal pharmacogenetic variants are plausible modulators of this risk. In this work, we studied 5,427 DNA samples, including 1,244 from subjects in Denmark and Iowa with facial clefting and 4,183 from parents, siblings, or unrelated population controls. We examined 25 single-nucleotide polymorphisms in 16 genes in pathways for detoxification of components of cigarette smoke, to look for evidence of gene-environment interactions. For genes identified as related to oral clefting, we studied gene-expression profiles in fetal development in the relevant tissues and time intervals. Maternal smoking was a significant risk factor for clefting and showed dosage effects, in both the Danish and Iowan data. Suggestive effects of variants in the fetal NAT2 and CYP1A1 genes were observed in both the Iowan and the Danish participants. In an expanded case set, NAT2 continued to show significant overtransmission of an allele to the fetus, with a final P value of .00003. There was an interaction between maternal smoking and fetal inheritance of a GSTT1-null deletion, seen in both the Danish ( P=.03) and Iowan ( P=.002) studies, with a Fisher’s combined P value of &lt;.001, which remained significant after correction for multiple comparisons. Gene-expression analysis demonstrated expression of GSTT1 in human embryonic craniofacial tissues during the relevant developmental interval. 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Maternal or fetal pharmacogenetic variants are plausible modulators of this risk. In this work, we studied 5,427 DNA samples, including 1,244 from subjects in Denmark and Iowa with facial clefting and 4,183 from parents, siblings, or unrelated population controls. We examined 25 single-nucleotide polymorphisms in 16 genes in pathways for detoxification of components of cigarette smoke, to look for evidence of gene-environment interactions. For genes identified as related to oral clefting, we studied gene-expression profiles in fetal development in the relevant tissues and time intervals. Maternal smoking was a significant risk factor for clefting and showed dosage effects, in both the Danish and Iowan data. Suggestive effects of variants in the fetal NAT2 and CYP1A1 genes were observed in both the Iowan and the Danish participants. In an expanded case set, NAT2 continued to show significant overtransmission of an allele to the fetus, with a final P value of .00003. There was an interaction between maternal smoking and fetal inheritance of a GSTT1-null deletion, seen in both the Danish ( P=.03) and Iowan ( P=.002) studies, with a Fisher’s combined P value of &lt;.001, which remained significant after correction for multiple comparisons. Gene-expression analysis demonstrated expression of GSTT1 in human embryonic craniofacial tissues during the relevant developmental interval. 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subjects Arylamine N-Acetyltransferase - biosynthesis
Arylamine N-Acetyltransferase - genetics
Biological and medical sciences
Cleft Lip - genetics
Cleft Palate - genetics
Cytochrome P-450 CYP1A1 - biosynthesis
Cytochrome P-450 CYP1A1 - genetics
Deoxyribonucleic acid
DNA
Embryo, Mammalian - metabolism
Face
Female
Fundamental and applied biological sciences. Psychology
Gene expression
Gene Expression Profiling
General aspects. Genetic counseling
Genetics of eukaryotes. Biological and molecular evolution
Glutathione Transferase - genetics
History, 16th Century
Humans
Linkage Disequilibrium
Male
Maternal Exposure - adverse effects
Medical genetics
Medical sciences
Molecular and cellular biology
Polymorphism
Polymorphism, Single Nucleotide
Pregnancy
Risk Factors
Smoking
Smoking - genetics
Tobacco, tobacco smoking
Toxicology
title Orofacial Cleft Risk Is Increased with Maternal Smoking and Specific Detoxification-Gene Variants
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