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Published on: October 7, 2009
Non-syndromic cleft lip with or without palate-susceptible SNPs is associated with hyperdontia
Shiyi Kan1,2, Guirong Zhu1,2, Yifei Du1,3
1Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, China.
Background:
Non-syndromic supernumerary teeth (NSST) or hyperdontia may share common genetic determinants with non-syndromic cleft lip with or without palate (NSCL/P). The aim of this study was to test the associations between five genome-wide-associated NSCL/P-susceptible single nucleotide polymorphisms (SNPs) (rs2235371, rs7078160, rs8049367, rs4791774, and rs13041247) and the occurrence of NSST.
Materials And Methods:
A total of 163 cases and 326 controls were recruited and their genomic DNA was extracted from blood samples. Five NSCL/P-susceptible SNPs (rs2235371, rs7078160, rs8049367, rs4791774, and rs13041247) were genotyped by TaqMan method. Odds ratio (OR) and 95% confidence interval (CI) were used to estimate the associations between the SNPs and the risk of NSST by PLINK software.
Results:
Rs4791774 (A > G) and rs13041247 (T > C) were associated with risk of NSST (rs4791774: Padd = 0.011, OR, 95% CI = 0.62, 0.43-0.90; rs13041247: Phomo = 0.031, OR, 95% CI = 1.79, 1.05-3.05) and one supernumerary tooth (rs4791774: Pdom = 0.009, OR, 95% CI = 0.56, 0.36-0.87; rs13041247: Phomo = 0.034, OR, 95% CI = 1.82, 1.05-3.15). Rs4791774 (A > G) was also showed association with risk of upper arch supernumerary teeth only (Padd = 0.010, OR, 95% CI = 0.60, 0.41-0.89).
Conclusion:
Non-syndromic cleft lip with or without palate-susceptible loci rs4791774 (A > G) and rs13041247 (T > C) were associated with the risk of supernumerary teeth.
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