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Related Experiment Videos

Juvenile-onset distal myopathy in Rottweiler dogs

S M Hanson1, M O Smith, T L Walker

  • 1Southern California Veterinary Surgical Group, Irvine, USA.

Journal of Veterinary Internal Medicine
|April 30, 1998
PubMed
Summary

This study identifies a novel canine muscular dystrophy in Rottweilers, characterized by muscle weakness and carnitine deficiency. These findings suggest a potential new genetic muscle disorder in dogs.

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Area of Science:

  • Veterinary Neurology
  • Canine Genetics
  • Muscle Diseases

Background:

  • Investigating novel neuromuscular disorders in canine populations is crucial for understanding disease mechanisms.
  • Distal myopathies in humans are often associated with genetic factors and muscle degeneration.

Observation:

  • Four juvenile Rottweilers presented with progressive muscle weakness, abnormal stances (plantigrade/palmigrade), and splayed digits.
  • Electromyography showed primary myopathic changes, with reduced muscle action potentials.
  • Muscle biopsies revealed myofiber atrophy, fibrosis, and fatty infiltration, predominantly in distal muscles.

Findings:

  • All affected dogs exhibited decreased plasma carnitine levels (total and free).
  • Muscle carnitine levels were also reduced in most affected dogs.

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  • Histopathology confirmed a primary myopathy consistent with muscular dystrophy, distinct from metabolic disorders.

    • Implications:

    • This research describes a previously unreported form of canine muscular dystrophy.
    • The findings highlight the importance of carnitine levels in diagnosing canine muscle disorders.
    • This discovery may offer insights into human distal myopathies and their genetic underpinnings.