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Related Experiment Videos

Proteolytic activity in CSF

P T Richards, M L Cuzner

    Advances in Experimental Medicine and Biology
    |January 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

    Cerebrospinal fluid (CSF) proteolytic enzyme activity, at acid and neutral pH, can be measured using a sensitive assay. Elevated levels of these enzymes are linked to multiple sclerosis and central nervous system infections.

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    Area of Science:

    • Biochemistry
    • Neuroscience
    • Clinical Chemistry

    Background:

    • Proteolytic enzymes in cerebrospinal fluid (CSF) play roles in various physiological and pathological processes.
    • Understanding their activity is crucial for diagnosing neurological disorders.
    • Previous assays lacked sensitivity or specificity for different pH conditions.

    Purpose of the Study:

    • To develop and validate a sensitive assay for measuring proteolytic enzyme activity in CSF across different pH values.
    • To investigate the correlation between specific CSF proteolytic enzyme levels and neurological conditions like multiple sclerosis and CNS infections.

    Main Methods:

    • A sensitive assay was developed utilizing 125I-labeled basic protein as a substrate.
    • Enzyme activity was measured by monitoring the rate of substrate breakdown.

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  • Polyacrylamide gel electrophoresis was employed for precise analysis.
  • CSF samples from patients with acute multiple sclerosis, CNS infections, and controls were analyzed at both acid and neutral pH.

    • Main Results:

    • The assay demonstrated high sensitivity in detecting proteolytic enzyme activity in CSF.
    • Elevated levels of CSF cellular neutral proteinase were observed in patients with acute multiple sclerosis.
    • Increased supernatant acid proteinase activity was detected in patients with central nervous system infections.

    Conclusions:

    • The developed assay is effective for quantifying proteolytic enzyme activity in CSF at both acid and neutral pH.
    • Increased neutral proteinase activity in CSF is a potential biomarker for acute multiple sclerosis.
    • Elevated acid proteinase activity in CSF may indicate CNS infections.