Abstract:
BACKGROUND:Primary ciliary dyskinesia (PCD) is a rare genetic disorder caused by functional impairment of cilia throughout the body. The involvement of copy number variation (CNV) in the development of PCD is largely unknown. METHODS:We examined 93 Japanese patients with clinically suspected PCD from 84 unrelated families. CNV was examined either by exome sequencing of a PCD gene panel or by whole-exome sequencing (WES). The identified alterations were validated by PCR and Sanger sequencing. Nasal ciliary ultrastructure was examined by electron microscopy. RESULTS:Analysis of CNV by the panel or WES revealed a biallelic deletion in the dynein regulatory complex subunit 1 (DRC1) gene in 21 patients, which accounted for 49% of the PCD patients in whom a disease-causing gene was found. Sanger sequencing of the PCR product revealed a 27,748-bp biallelic deletion including exons 1-4 of DRC1 with identical breakpoints in all 21 patients. The ciliary ultrastructure of the patients with this CNV showed axonemal disorganization and the loss or gain of central microtubules. CONCLUSION:The deletion of DRC1 is the major cause of PCD in Japan and this alteration can cause various ciliary ultrastructural abnormalities.
journal_name
Mol Genet Genomic Medjournal_title
Molecular genetics & genomic medicineauthors
Takeuchi K,Xu Y,Kitano M,Chiyonobu K,Abo M,Ikegami K,Ogawa S,Ikejiri M,Kondo M,Gotoh S,Nagao M,Fujisawa T,Nakatani Kdoi
10.1002/mgg3.1137subject
Has Abstractpub_date
2020-03-01 00:00:00pages
e1137issue
3issn
2324-9269journal_volume
8pub_type
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