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Related Experiment Videos

Primary ciliary dyskinesia in the dog.

W B Morrison1, N J Wilsman, L E Fox

  • 1Department of Veterinary Clinical Sciences, Iowa State University, Ames.

Journal of Veterinary Internal Medicine
|April 1, 1987
PubMed
Summary

Electron microscopy diagnosed primary ciliary dyskinesia in dogs. Abnormal central and B microtubules were found in respiratory cilia, revealing specific outer dynein arm component absence, not just shortening.

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Area of Science:

  • Veterinary Pathology
  • Cell Biology
  • Genetics

Background:

  • Primary ciliary dyskinesia (PCD) is a rare genetic disorder affecting motile cilia.
  • Diagnosis often relies on identifying characteristic ultrastructural defects in cilia.
  • Canine models offer valuable insights into human PCD.

Purpose of the Study:

  • To diagnose primary ciliary dyskinesia in affected dogs using electron microscopy.
  • To characterize the ultrastructural abnormalities in respiratory cilia of dogs with PCD.
  • To clarify the nature of outer dynein arm defects in canine PCD.

Main Methods:

  • Electron microscopy was employed for ultrastructural analysis.
  • A specific technique involving membrane solubilization, fixation, and negative staining with glutaraldehyde tannic acid was utilized.
  • Respiratory cilia samples were obtained from affected English pointer dogs and a golden retriever.

Main Results:

  • Abnormally constructed central and B microtubules were identified in respiratory cilia.
  • The study revealed that shortened outer dynein arms in PCD represent the absence of specific peripheral components.
  • This finding refines the understanding of outer dynein arm structure and function.

Conclusions:

  • Electron microscopy is a reliable diagnostic tool for canine primary ciliary dyskinesia.
  • Specific defects in microtubule structure and outer dynein arm components are key ultrastructural markers for PCD.
  • Understanding these canine ciliary defects can inform research into human primary ciliary dyskinesia.

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