Identification of a Novel Variant of ARHGAP29 in a Chinese Family with Nonsyndromic Cleft Lip and Palate

• Published in: BioMed research international 2020, Vol.2020 (2020), p.1-6
• Main Authors: Fan, Liang-Liang, Jin, Jie-Yuan, Wang, Kai, Xiao, Xiang-Shui, Tang, Jian-Xia, Xiang, Rong
• Format: Article
• Language: English
• Subjects: Adolescent; Adult; Base Sequence; Birth defects; Cleft lip; Cleft Lip - diagnosis; Cleft Lip - genetics; Cleft Lip - pathology; Cleft lip/palate; Cleft palate; Cleft Palate - diagnosis; Cleft Palate - genetics; Cleft Palate - pathology; Computational Biology - methods; Congenital defects; Congenital diseases; Craniofacial growth; Etiology; Female; Fistula; Gene Expression; Gene regulation; Genes; Genetic aspects; Genetic factors; Genetic polymorphisms; Genetic Predisposition to Disease; Genetic screening; Genetics; Genomes; Genomics; Genotype & phenotype; GTPase-Activating Proteins - genetics; Heterozygote; Humans; Identification and classification; Male; Mutation; Mutation, Missense; Pathogenicity; Pathogens; Pedigree; Physiological aspects; Polymorphism; Polymorphism, Single Nucleotide; RhoA protein; Whole Exome Sequencing
• ISSN: 2314-6133; 2314-6141
• DOI: 10.1155/2020/8790531

Background. Cleft lip with or without cleft palate (CL/P) is the most common facial birth defect, with a worldwide incidence of 1 in 700-1000 live births. CL/P can be divided into syndromic CL/P (SCL/P) and nonsyndromic CL/P (NSCL/P). Genetic factors are an important component to the etiology of NSCL/P. ARHGAP29, one of the NSCL/P disease-causing genes, mediates the cyclical regulation of small GTP binding proteins such as RhoA and plays an essential role in cellular shape, proliferation, and craniofacial development. Methods. The present study investigated a Chinese family with NSCL/P and explored potential pathogenic variants using whole-exome sequencing (WES). Variants were screened and filtered through bioinformatic analysis and prediction of variant pathogenicity. Cosegregation was subsequently conducted. Results. We identified a novel heterozygous missense variant of ARHGAP29 (c.2615C > T, p.A872V) in a Chinese pedigree with NSCL/P. Conclusion. We detected the disease-causing variant in this NSCL/P family. Our identification expands the genetic spectrum of ARHGAP29 and contributes to novel approaches to the genetic diagnosis and counseling of CL/P families.