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Oligodendroglial pathology in canine distemper
A Zurbriggen1, I Schmid, H U Graber
1Institute of Animal Neurology, University of Berne, Switzerland. zurbriggen@itn.unibe.ch
Acta Neuropathologica
|February 7, 1998
Summary
Canine distemper virus (CDV) causes demyelination in dogs by infecting oligodendrocytes. This restricted infection leads to reduced myelin gene expression, contributing to the disease process.
Area of Science:
- Veterinary Neurology
- Viral Pathogenesis
- Neuroimmunology
Background:
- Canine distemper virus (CDV) causes multifocal demyelinating disease in dogs.
- The precise mechanism of acute demyelination in canine distemper remains poorly understood.
- While CDV replication correlates with demyelination, direct oligodendrocyte infection is not well-established.
Purpose of the Study:
- To investigate the role of oligodendrocyte infection in canine distemper-induced demyelination in vivo.
- To correlate oligodendrocyte infection with myelin gene expression changes in demyelinating lesions.
- To overcome limitations in canine oligodendrocyte labeling for in vivo studies.
Main Methods:
- Combined immunohistochemistry and in situ hybridization techniques.
- Examination of oligodendrocytes within demyelinating lesions in canine brain tissue.
- Assessment of CDV replication and myelin gene transcription in oligodendrocytes.
Main Results:
- Demonstrated massive down-regulation of myelin gene expression in demyelinating lesions.
- Showed a correlation between CDV infection and reduced myelin gene transcription.
- Provided evidence for restricted CDV infection in oligodendrocytes in vivo, contributing to demyelination.
Conclusions:
- CDV infection significantly impacts myelin gene expression in canine demyelinating lesions.
- Restricted oligodendrocyte infection by CDV is a key factor in the pathogenesis of canine distemper demyelination.
- This study elucidates a critical mechanism in CDV-induced neurological disease.