A candidate gene approach to identify modifiers of the palatal phenotype in 22q11.2 deletion syndrome patients

Josine C. C. Widdershoven*, Mark Bowser, Molly B. Sheridan, Donna M. McDonald-McGinn, Elaine H. Zackai, Cynthia B. Solot, Richard E. Kirschner, Frits A. Beemer, Bernice E. Morrow, Marcella Devoto, Beverly S. Emanuel

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

9 Citations (Web of Science)

Abstract

Objective: Palatal anomalies are one of the identifying features of 22q11.2 deletion syndrome (22q11.2DS) affecting about one third of patients. To identify genetic variants that increase the risk of cleft or palatal anomalies in 22q11.2DS patients, we performed a candidate gene association study in 101 patients with 22q11.2DS genotyped with the Affymetrix genome-wide human SNP array 6.0. Methods: Patients from Children's Hospital of Philadelphia, USA and Wilhelmina Children's Hospital Utrecht, The Netherlands were stratified based on palatal phenotype (overt cleft, submucosal cleft, bifid uvula). SNPs in 21 candidate genes for cleft palate were analyzed for genotype-phenotype association. In addition, TBX1 sequencing was carried out. Quality control and association analyses were conducted using the software package PLINK. Results: Genotype and phenotype data of 101 unrelated patients (63 non-cleft subjects (62.4%), 38 cleft subjects (37.6%)) were analyzed. A Total of 39 SNPs on 10 genes demonstrated a p-value
Original languageEnglish
Pages (from-to)123-127
JournalInternational Journal of Pediatric Otorhinolaryngology
Volume77
Issue number1
DOIs
Publication statusPublished - Jan 2013

Keywords

  • 22q11.2 deletion syndrome
  • Cleft palate
  • Candidate gene

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