{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T08:09:34Z","timestamp":1773043774076,"version":"3.50.1"},"reference-count":40,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2012,3,13]],"date-time":"2012-03-13T00:00:00Z","timestamp":1331596800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100007543","name":"Charles University Grant Agency","doi-asserted-by":"crossref","award":["48409"],"award-info":[{"award-number":["48409"]}],"id":[{"id":"10.13039\/100007543","id-type":"DOI","asserted-by":"crossref"}]},{"name":"Internal Grant Agency of the Ministry of Health of the Czech Republic","award":["NT11469-5"],"award-info":[{"award-number":["NT11469-5"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pediatric Pulmonology"],"published-print":{"date-parts":[[2012,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Introduction<\/jats:title><jats:p>Primary ciliary dyskinesia (PCD) is a rare genetically heterogenous condition. Mutations in <jats:italic>DNAH5<\/jats:italic> or <jats:italic>DNAI1<\/jats:italic> genes can be found in about a third of the patients with PCD. Increased occurrence of mutations was described in several exons of these long genes. The objective of the study was to test the sensitivity of sequencing of selected 13 exons (as compared to costly sequencing of all 100 exons of the two genes), and to determine the prevalence of the <jats:italic>DNAH5<\/jats:italic> or <jats:italic>DNAI1<\/jats:italic> mutations in the Czech PCD database.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The Czech national PCD database has identified 31 pediatric patients, diagnosed based on clinical findings and tests on the ciliated epithelium. Twenty\u2010seven patients from 24 families agreed on genetic testing. In the first step, direct sequencing of selected 13 exons (9 of <jats:italic>DNAH5<\/jats:italic> and 4 of <jats:italic>DNAI1<\/jats:italic>) was performed, and then we compared its effectiveness in detecting at least one mutation with results of sequencing all 100 exons of the two genes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The sequencing of all exons identified compound heterozygosity for PCD mutations in nine patients from eight families (<jats:italic>DNAH5<\/jats:italic> in eight and <jats:italic>DNAI1<\/jats:italic> in one patient), and heterozygozity for a <jats:italic>DNAH5<\/jats:italic> mutation of uncertain functional significance in one additional patient. The first step of selected exon sequencing detected a mutation in five out of these eight families, its actual sensitivity being 62.5%, with a high predictive value. The phenotypic and clinical characteristics of all the paediatric patients with PCD are shown.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Selected exon sequencing detects at least one mutated allele in over a half of our patients who have PCD due to <jats:italic>DNAH5<\/jats:italic> or <jats:italic>DNAI1<\/jats:italic> mutations. To lower the costs of the genetic testing, targeted step\u2010wise genetic testing may be a reasonable approach to detect mutations in PCD patients, especially if their phenotype is taken into account. Pediatr Pulmonol. 2012. 47:864\u2013875. \u00a9 2012 Wiley Periodicals, Inc.<\/jats:p><\/jats:sec>","DOI":"10.1002\/ppul.22520","type":"journal-article","created":{"date-parts":[[2012,3,13]],"date-time":"2012-03-13T20:26:03Z","timestamp":1331670363000},"page":"864-875","source":"Crossref","is-referenced-by-count":36,"title":["Effectiveness of sequencing selected exons of <i>DNAH5 and DNAI1<\/i> in diagnosis of primary ciliary 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