机构：[1]Department of Otolaryngology, Head & Neck Surgery, Kunming Children’s Hospital, Kunming, China[2]Yunnan Pediatric Institute, Kunming Children’s Hospital, Kunming, China[3]Department of Otolaryngology, First Hospital of Kunming Medical University, Kunming, China外科科室耳鼻咽喉科昆明医科大学附属第一医院[4]Yunnan Rehabilitation School For Children With Hearing Impairment, Kunming, China[5]Institute of Medical Biology, Chinese Academy of Medical Sciences & Peking Union of Medical College, Kunming, China
Background To analyze the clinical phenotypes and genetic variants of a Chinese family with Waardenburg syndrome (WS) and to explore the possible molecular pathogenesis of WS. Methods The clinical data from a patient and his family were collected. The genomic DNA of the patient and his family was purified from their peripheral blood. All exons and flanking sequences of the MITF, PAX3, SOX10, SNAI2, END3, and EDNRB genes were investigated through high-throughput sequencing. Based on the results of high-throughput sequencing, genetic variants in the patient and his family were verified and analyzed by Sanger sequencing. Results The patient was diagnosed with typical WS1 that manifested in hearing impairment, inner canthus ectopia and heterochromic iris. Sanger sequencing revealed the pathogenic heterozygous c.420-424de1CGCGGinsTTAC mutation in the PAX3 gene in the proband, which is a frameshift mutation that changed the amino acid sequence of the PAX3 protein from AVCDRNTVPSV to YSVIETPCRQ* (* refers to a stop codon) from amino acids 141-151. The stop codon induced by this mutation resulted in the truncation of the PAX3 protein. The same mutation sites were also found in the mother and younger sister of the proband. No previous report of this mutation was found in the Human Gene Mutation Database. Conclusion The novel heterozygous c.420-424de1CGCGGinsTTAC mutation is the molecular pathological cause for WS1 in our patient. The clinical and genetic characterization of this family with WS1 elucidated the genetic heterogeneity of PAX3 in WS1. Moreover, the mutation detected in this case has expanded the database of PAX3 mutations.
基金：
National Natural Science Fund of China (China)National Natural Science Foundation of China [81660175]; High-level Health and Family Planning Technical Personnel Training Projects of Yunnan Province [D-201637]; Yunnan Children's Hearing Impairment and Speech Disease Comprehensive Prevention Innovation Team; Yunnan Key Laboratory of Children's Major Disease Research
第一作者机构：[1]Department of Otolaryngology, Head & Neck Surgery, Kunming Children’s Hospital, Kunming, China
共同第一作者：
通讯作者：
通讯机构：[*1]Department of Otolaryngology, Head & Neck Surgery, Kunming Children’s Hospital, 288 Qianxing Road, Xishan, Kunming, Yunnan 650228, P.R. China.[*2]Department of Otolaryngology, First Hospital of Kunming Medical University, 295 Xichang Road, Wuhua,Kunming, Yunnan 650032, P.R. China.
推荐引用方式(GB/T 7714)：
Ma Jing,Lin Ken,Jiang Hong-chao,et al.A novel mutation of the PAX3 gene in a Chinese family with Waardenburg syndrome type I[J].MOLECULAR GENETICS & GENOMIC MEDICINE.2019,7(7):doi:10.1002/mgg3.798.
APA：
Ma, Jing,Lin, Ken,Jiang, Hong-chao,Yang, Yanli,Zhang, Yu...&Ruan, Biao.(2019).A novel mutation of the PAX3 gene in a Chinese family with Waardenburg syndrome type I.MOLECULAR GENETICS & GENOMIC MEDICINE,7,(7)
MLA：
Ma, Jing,et al."A novel mutation of the PAX3 gene in a Chinese family with Waardenburg syndrome type I".MOLECULAR GENETICS & GENOMIC MEDICINE 7..7(2019)
