What question did this study set out to answer?

Investigate the relationship between muscle fiber diameter and the incidence of muscle fiber necrosis across various muscles, developmental stages, and experimental conditions in mdx mice.

August 1, 1988Muscle & Nerve

Small‐caliber skeletal muscle fibers do not suffer necrosis in mdx mouse dystrophy

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Authors

GKGeorge KarpatiMontreal Neurological Institute and Hospital SCStirling CarpenterHospital de São João SPSteven A. PrescottUniversity of Calgary

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Implication

Murine study demonstrates that muscle fibers under 20 micrometers escape necrosis in mdx dystrophy, indicating that small fiber caliber prevents dystrophic degeneration.

Key Points

Investigate the relationship between muscle fiber diameter and the incidence of muscle fiber necrosis across various muscles, developmental stages, and experimental conditions in mdx mice.
Measured the prevalence of centronucleated fibers across different ages in mdx mice as a cumulative marker of prior muscle fiber necrosis.
Assessed fiber diameter and necrosis across intact limb muscles, leg muscles subjected to peripheral nerve section or cordotomy at 15 days, and rotator extraocular muscles.
Centronucleated fiber prevalence increased progressively after day 20, reaching a peak of 80% at 60 days in standard mdx limb muscles.
Necrosis and centronucleation were absent in limb muscles before day 15, in denervated or cordotomy-immobilized muscles, and in extraocular muscles throughout life, all maintaining diameters below approximately 20 µm.

Cite This Study

Karpati et al. (1988) studied this question.

synapsesocial.com/papers/6a72b59526a7f98052de6e16 https://doi.org/10.1002/mus.880110802

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Implication

Murine study demonstrates that muscle fibers under 20 micrometers escape necrosis in mdx dystrophy, indicating that small fiber caliber prevents dystrophic degeneration.

Small‐caliber skeletal muscle fibers do not suffer necrosis in mdx mouse dystrophy

Discussion

Member takes

Implication

Key Points

Cite This Study

Small‐caliber skeletal muscle fibers do not suffer necrosis in mdx mouse dystrophy

Discussion

Member takes

Implication

Key Points

Cite This Study

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