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Genetic Interactions in Nonsyndromic Orofacial Clefts in Europe-EUROCRAN Study

Research output: Contribution to journalArticle

  • Peter A Mossey
  • Julian Little
  • Regine Steegers-Theunissen
  • Anne Molloy
  • Borut Peterlin
  • William C Shaw
  • Candice Johnson
  • David R FitzPatrick
  • Paola Franceschelli
  • Michele Rubini

Related Edinburgh Organisations

Original languageEnglish
JournalCleft Palate Craniofacial Journal
Early online date20 Dec 2016
DOIs
StatePublished - Nov 2017

Abstract

BACKGROUND:   Nonsyndromic cleft lip with or without cleft palate (nsCL±P) and nonsyndromic cleft palate (nsCP) are caused by a combination of genetic and environmental risk factors. We investigated gene-environment and gene-gene joint effects in a large multicenter study of case-parent triads.

METHODS:   The nsCL±P or nsCP triads were recruited in 11 European countries between 2001 and 2005. We collected DNA samples from infants and from their mothers and fathers, and mothers completed a questionnaire on exposures, including smoking and folic acid supplement use during pregnancy. We used log-linear regression to estimate relative risks (RRs) and 95% confidence intervals (CIs) for associations between nsCL±P or nsCP and variants in MTHFR, MTHFD1, TGFA, SATB2, and MSX1, stratifying by environmental or genetic factors.

RESULTS:   We obtained genotype and exposure data for 728 nsCL±P triads and 292 nsCP triads. In male infants, there was no association between the mother's homozygous MSX1 p(CA) *4/*4 genotype and nsCL±P (RR, 0.98; 95% CI, 0.63-1.54), but this maternal genotype resulted in a doubling of risk for female infants (RR, 2.21; 95% CI, 1.13-4.34). There was evidence suggestive of gene-gene joint-effects between MTHFR-TGFA for nsCP but not for nsCL±P.

CONCLUSION:   Although we chose the genes and their variants and putative joint effects based on associations previously reported in the literature, we replicated few associations. These results do not provide evidence supporting associations between these genes and oral clefts in European populations, although gene-environment and gene-gene interactions could play a role in oral cleft etiology.

ID: 30258352