Population specificity of the DNAI1 gene mutation spectrum in primary ciliary dyskinesia (PCD)
| Autor: | Barbara Nitka, Kinga Humińska, Ewa Ziętkiewicz, Ewa Rutkiewicz, Andrzej Pogorzelski, Zuzanna Bukowy, Hanna Przystałowska, Urszula Skrzypczak, Michal Witt, Katarzyna Voelkel |
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| Rok vydání: | 2010 |
| Předmět: |
Male
Pulmonary and Respiratory Medicine Population Biology medicine.disease_cause Pathogenesis 03 medical and health sciences Monoallelic Mutation Prevalence otorhinolaryngologic diseases medicine Humans Genetic Predisposition to Disease education 030304 developmental biology Primary ciliary dyskinesia lcsh:RC705-779 Genetics 0303 health sciences Mutation education.field_of_study Genetic heterogeneity Research 030305 genetics & heredity Axonemal Dyneins lcsh:Diseases of the respiratory system medicine.disease 3. Good health Ciliary Motility Disorders DNAI1 gene Female Poland |
| Zdroj: | Respiratory Research, Vol 11, Iss 1, p 174 (2010) Respiratory Research |
| ISSN: | 1465-993X |
| DOI: | 10.1186/1465-9921-11-174 |
| Popis: | Background Mutations in the DNAI1 gene, encoding a component of outer dynein arms of the ciliary apparatus, are the second most important genetic cause of primary ciliary dyskinesia (PCD), the genetically heterogeneous recessive disorder with the prevalence of ~1/20,000. The estimates of the DNAI1 involvement in PCD pathogenesis differ among the reported studies, ranging from 4% to 10%. Methods The coding sequence of DNAI1 was screened (SSCP analysis and direct sequencing) in a group of PCD patients (157 families, 185 affected individuals), the first ever studied large cohort of PCD patients of Slavic origin (mostly Polish); multiplex ligation-dependent probe amplification (MLPA) analysis was performed in a subset of ~80 families. Results Three previously reported mutations (IVS1+2-3insT, L513P and A538T) and two novel missense substitutions (C388Y and G515S) were identified in 12 families (i.e. ~8% of non-related Polish PCD patients). The structure of background SNP haplotypes indicated common origin of each of the two most frequent mutations, IVS1+2-3insT and A538T. MLPA analysis did not reveal any significant differences between patients and control samples. The Polish cohort was compared with all the previously studied PCD groups (a total of 487 families): IVS1+2-3insT remained the most prevalent pathogenetic change in DNAI1 (54% of the mutations identified worldwide), and the increased global prevalence of A538T (14%) was due to the contribution of the Polish cohort. Conclusions The worldwide involvement of DNAI1 mutations in PCD pathogenesis in families not preselected for ODA defects ranges from 7 to 10%; this global estimate as well as the mutation profile differs in specific populations. Analysis of the background SNP haplotypes suggests that the increased frequency of chromosomes carrying A538T mutations in Polish patients may reflects local (Polish or Slavic) founder effect. Results of the MLPA analysis indicate that no large exonic deletions are involved in PCD pathogenesis. |
| Databáze: | OpenAIRE |
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