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Device for quantitative cytochemistry: a computerized scanning microdensitometer 'grain counter'

N S Markovic, L E Lipkin, O S Markovic

    The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society
    |October 1, 1978
    PubMed
    Summary
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    This study introduces a computerized scanning microdensitometer for quantitative cytochemistry, enabling precise measurement of cellular reactions and enzyme kinetics in leukocytes.

    Area of Science:

    • Cellular biology
    • Biochemistry
    • Histochemistry

    Background:

    • Quantitative cytochemistry requires precise measurement of cellular components and reactions.
    • Previous methods lacked the ability to quantitate reaction products and kinetics within single cells.

    Purpose of the Study:

    • To develop and validate a method for quantitative analysis of cytochemical reactions in single cells.
    • To measure the kinetics of enzyme formation and activity within individual leukocytes.

    Main Methods:

    • Utilized a computerized scanning microdensitometer and autoradiographic grain counter.
    • Performed optical density and area measurements on stained leukocytes.
    • Employed an adapted Dvorak-Stotler Chamber for in-situ enzyme kinetics studies.

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    Main Results:

    • Successfully quantitated cytochemical final reaction products and their formation kinetics in single cells.
    • Analyzed various cellular components including glycogen, lipids, and multiple enzymes (peroxidase, esterases, phosphatases).
    • Demonstrated the capability to measure enzyme kinetics within single cells using chamber studies.

    Conclusions:

    • The developed system provides accurate quantitative data on cellular reactions and enzyme kinetics.
    • This methodology enhances the study of cellular biochemistry and disease processes at the single-cell level.