- 作者：Thomas W. Ferkol ; Erik G. Puffenberger ; Hauw Lie ; Cynthia Helms ; Kevin A. Strauss ; Anne Bowcock ; John L. Carson ; Milan Hazucha ; D. Holmes Morton ; An ; C. Patel ; Margaret W. Leigh ; Michael R. Knowles ; Maimoona A. Zariwala
- 关键词：NO ; Nitric oxide ; PCD ; Primary ciliary dyskinesia
- 刊名：The Journal of Pediatrics
- 出版年：2013
- 出版时间：August, 2013
- 年：2013
- 卷：163
- 期：2
- 页码：383-387
- 全文大小：321 K
Objective
To determine whether individuals with primary ciliary dyskinesia (PCD) from unrelated Amish and Mennonite families harbor a single and unique founder mutation.Study design
Subjects from Amish and Mennonite communities in several states were enrolled in the study. All subjects were clinically characterized, and nasal nitric oxide levels were measured. Nasal epithelial scrapings were collected from several subjects for ciliary ultrastructural analyses. DNA was isolated from patients with PCD and their unaffected first- and second-degree relatives. Genome-wide homozygosity mapping, linkage analyses, targeted mutation analyses, and exome sequencing were performed.
Results
All subjects from Old-Order Amish communities from Pennsylvania were homozygous for a nonsense mutant DNAH5 allele, c.4348C>T (p.Q1450X). Two affected siblings from an unrelated Mennonite family in Arkansas were homozygous for the same nonsense DNAH5 mutation. Children with PCD from an Amish family from Wisconsin had biallelic DNAH5 mutations, c.4348C>T (p.Q1450X) and c.10815delT (p.P3606HfsX23), and mutations in other genes associated with PCD were also identified in this community.
Conclusion
The Amish and Mennonite subjects from geographically dispersed and socially isolated communities had the same founder DNAH5 mutation, owing to the common heritage of these populations. However, disease-causing mutations in other PCD-associated genes were also found in affected individuals in these communities, illustrating the genetic heterogeneity in this consanguineous population.