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Related Experiment Videos

Experimental corticosteroid myopathy

P W Braunstein, U DeGirolami

    Acta Neuropathologica
    |January 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Steroids like triamcinolone can cause muscle damage in rats. Different steroid types affect specific muscle fiber types, with triamcinolone being the most potent in causing lesions.

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    Area of Science:

    • Muscle physiology
    • Pharmacology
    • Histopathology

    Background:

    • Glucocorticoids are potent anti-inflammatory drugs with known side effects.
    • Muscle atrophy and necrosis are potential adverse effects of corticosteroid therapy.

    Purpose of the Study:

    • To investigate the differential effects of various corticosteroids on specific muscle fiber types.
    • To determine the potency of different steroids in inducing muscle lesions.

    Main Methods:

    • Adult rats were administered four different steroids (triamcinolone, dexamethasone, betamethasone, cortisone) intraperitoneally for 14-63 days.
    • Histological and histochemical analyses were performed on the extensor digitorum longus (EDL) and soleus (SOL) muscles.

    Main Results:

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    • Triamcinolone demonstrated the highest potency in causing muscle lesions.
    • Selective fiber type involvement was observed: Type 1 fibers in the soleus muscle showed necrosis, while Type 2 fibers in both soleus and EDL muscles exhibited atrophy.

    Conclusions:

    • Corticosteroids exhibit selective toxicity towards different muscle fiber types.
    • Triamcinolone is particularly potent in inducing steroid-induced myopathy, affecting both necrotic and atrophic changes in specific muscle fibers.