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Related Experiment Videos

Needle biopsy for muscle chemistry.

R H Edwards, D A Jones, C Maunder

    Lancet (London, England)
    |March 29, 1975
    PubMed
    Summary

    Needle biopsy enables human skeletal muscle analysis for metabolites and electrolytes. For accurate results in neuromuscular and metabolic disorders, freeze-dry and dissect samples, using creatine and nucleotides as reliable standards.

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    Area of Science:

    • Biochemistry
    • Human Physiology
    • Medical Diagnostics

    Background:

    • Needle biopsy is a standard method for obtaining human skeletal muscle tissue.
    • Biochemical analysis of muscle metabolites and electrolytes is crucial for diagnosing various disorders.
    • Tissue homogeneity in healthy muscle contrasts with the heterogeneity caused by fat and fibrous tissue replacement in myopathies, complicating analysis.

    Purpose of the Study:

    • To summarize analytical methods for muscle metabolites and electrolytes.
    • To provide normal ranges for muscle metabolites and electrolytes.
    • To review changes in these components in neuromuscular and metabolic disorders.

    Main Methods:

    • Enzymic microanalytical techniques for muscle metabolites.
    • Neutron-activation analysis for electrolytes.
    • Freeze-drying and dissection of needle-biopsy samples to remove connective tissue.

    Main Results:

    • Total creatine, total adenosine+inosine nucleotides, potassium, and phosphorus showed high correlation with sample dry weight after dissection.
    • These components are suggested as reliable standards for biochemical analysis.
    • The study highlights the importance of using multiple standards for accurate metabolite assessment in disease.

    Conclusions:

    • Freeze-drying and dissecting needle-biopsy samples are recommended for accurate biochemical analysis.
    • Total creatine, nucleotides, potassium, and phosphorus can serve as reliable standards for muscle metabolite quantification.
    • Accurate assessment of muscle metabolites in disease requires reference to multiple standards to account for potential disease-specific alterations.

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