基础医学与临床2024，Vol.44Issue(5)：677-682,6.DOI:10.16352/j.issn.1001-6325.2024.05.0677
2例中国原发性纤毛运动障碍患者致病变异的鉴定
Identification of the pathogenic variants in two Chinese patients with primary ciliary dyskinesia
摘要
Abstract
Objective To characterize the clinical features and to identify the pathogenic variants in two Chinese patients with primary ciliary dyskinesia(PCD).Methods The clinical data and peripheral blood sample from the patients were collected,and genomic DNA was subsequently extracted from the peripheral blood.Candidate patho-genic variants were identified using whole exome sequencing(WES)and further confirmed by Sanger sequencing technology.Finally,the pathogenicity of the variants was predicted through bioinformatic analysis.Results Two Chinese patients with PCD had diffuse bronchiectasis cpmlicated with recurrent infection and the decreased level of nasal nitric oxide(nNO).WES results showed that both patients carried frameshift mutations in known pathogenic genes of PCD.Patient 1 carried a homozygous variant in outer dynein arm docking complex subunit 1(ODAD1)(NM_144577):c.702_705dupGCAG(p.P236Afs*11)and patient 2 carried a hemizygous variant in dynein ax-onemal assembly factor 6(DNAAF6)(NM_173494):c.532_533delCT(p.L178Sfs*2).Neither variant had been recorded in The Human Gene Mutation Database(HGMD).Both frameshift variants caused changes in the open reading frame,which resulted in premature termination codon.According to the American College of Medical Genetics and Genomics(ACMG)guidelines,c.702_705dupGCAG in ODAD1 was categorized as a pathogenic va-riant(PVS1+PM2+PM3+PP4)and c.532_533delCT in DNAAF6 was categorized as a pathogenic variant(PVS1+PM2+PM3+PP4).Conclusions The novel variants c.702_705dupGCAG found in ODAD1 and c.532_533delCT found in DNAAF6 are pathogenic and support their PCD diagnosis for the two patients,respectively.These results may enrich the mutation spectrum of the ODAD1 and DNAAF6.关键词
原发性纤毛运动障碍/全外显子组测序/致病变异Key words
primary ciliary dyskinesia/whole exome sequencing/pathogenic variant分类
医药卫生引用本文复制引用
郑海霞,周王继,田欣伦,刘雅萍..2例中国原发性纤毛运动障碍患者致病变异的鉴定[J].基础医学与临床,2024,44(5):677-682,6.基金项目
北京协和医院中央高水平医院临床科研专项-科技创新人才项目(2023-PUMCH-E-012) （2023-PUMCH-E-012）
