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Related Experiment Videos

Amylase in the lung

M Otsuki, H Yuu, M Maeda

    Cancer
    |April 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Elevated amylase in lung cancer may stem from normal lung tissue activation, not ectopic production, except in rare cases. This study clarifies amylase origins in lung cancer and pneumonia.

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    Area of Science:

    • Biochemistry
    • Oncology
    • Pulmonology

    Background:

    • Elevated serum amylase is observed in primary lung cancer.
    • Previous studies suggested increased salivary-type amylase activity, but not ectopic production.

    Purpose of the Study:

    • To clarify the nature of amylase in lung cancer patients.
    • To determine if amylase is ectopically produced in tumor tissues.

    Main Methods:

    • Electrophoresis and column-chromatography (Sephadex G-75 Superfine) of serum, pleural fluid, and tumor extracts.
    • Isoamylase analysis.

    Main Results:

    • Hyperamylasemia in lung cancer cases showed increased salivary-type isoamylases, similar to pneumonia.
    • Amylase elution patterns differed from salivary amylase.
  • Ectopic amylase production with a unique isoamylase pattern was found in one lung cancer case.

    • Conclusions:

    • Salivary-type hyperamylasemia in lung cancer may result from inflammatory activation of normal lung amylase.
    • Ectopic amylase production is rare but possible in primary lung cancer.