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  • Title: Evaluating eight newly identified susceptibility loci for nonsyndromic cleft lip with or without cleft palate in a Mesoamerican population.
    Author: Ludwig KU, Wahle P, Reutter H, Paredes-Zenteno M, Muñoz-Jimenez SG, Ortiz-Lopez R, Böhmer AC, Tessmann P, Nowak S, Nöthen MM, Knapp M, Rojas-Martinez A, Mangold E.
    Journal: Birth Defects Res A Clin Mol Teratol; 2014 Jan; 100(1):43-7. PubMed ID: 24382704.
    Abstract:
    BACKGROUND: Nonsyndromic cleft lip with or without cleft palate (NSCL/P) is among the most frequently occurring congenital malformations worldwide. The number of genetic loci identified as being involved in NSCL/P etiology was recently increased by a large genome-wide meta-analysis of European and Asian samples. This meta-analysis confirmed all six previously recognized genetic susceptibility loci and identified six novel ones. METHODS: To investigate which of these 12 loci contribute to NSCL/P risk in an independent sample of distinct ethnicity, we performed a case-control association analysis in a sample of the Mesoamerican population. A total of 153 individuals with NSCL/P (cases) and 337 unaffected controls were included. Top single-nucleotide polymorphisms (SNPs) at 8 of the 12 loci (1p22.1, 1p36, 2p21, 3p11.1, 8q21.3, 13q31.1, 15q22, and 20q12) were analyzed using mass spectroscopy and restriction-length-fragment polymorphism analyses. In a previous study, we had analyzed the remaining four NSCL/P susceptibility regions (IRF6, 8q24, 10q25, and 17q22) in the same sample. RESULTS: Single-marker association analyses applying allelic, dominant, and recessive models revealed nominal significant associations for four of the eight loci, with two additional loci showing at least a trend of association in the hypothesized direction. CONCLUSION: In combination with results from our previous study using the same sample, our data suggest that the majority of the known NSCL/P susceptibility regions identified to date also confer risk for this malformation in the Mesoamerican population. Birth Defects Research (Part A) 100:43-47, 2014. © 2013 Wiley Periodicals, Inc.
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