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Cilia transport.

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Biological Transport↗

Long-term follow-up of the clinical relevance of short outer dynein arms in human nasal cilia.

Clinical significance of short outer dynein arms was examined in a long-term follow-up study of 76 patients with various respiratory symptoms. Clinical evaluations, nasal mucociliary transport rate (NMTR) measurement and transmission electron microscopy were performed. Follow-up examinations took place 5-11 years later. In the initial examination four patients and on follow-up seven patients were found to have short outer dynein arms in their nasal mucosal biopsies. Short dynein arms were associated with a slow NMTR, poorly coordinated ciliary beat direction, and clinical symptoms of perennial rhinitis and recurrent sinusitis. Short dynein arms were found to be a significant histologic finding and probably represent a variant of primary ciliary dyskinesia. In some cases short outer dynein arms may be a reversible finding with improving clinical symptoms. It is obvious that at least part of dynein defects are acquired.

Adolescent↗