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Related Experiment Videos

A topographic quantitative method for measuring brain tissue pH under physiological and pathophysiological

L Csiba, W Paschen, K A Hossmann

    Brain Research
    |December 19, 1983
    PubMed
    Summary

    Researchers developed a new method to measure brain pH using umbelliferone. This technique allows for quantitative regional assessment of brain pH in animal models under normal and ischemic conditions.

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    Area of Science:

    • Neuroscience
    • Biochemistry
    • Medical Imaging

    Background:

    • Accurate measurement of brain pH is crucial for understanding neurological conditions.
    • Existing methods for brain pH assessment have limitations in regional quantification.
    • The umbelliferone method offers potential for fluorescence-based pH imaging.

    Purpose of the Study:

    • To develop and validate a modified umbelliferone technique for quantitative regional brain pH assessment.
    • To apply the technique to evaluate brain pH changes under normal and ischemic conditions in animal models.

    Main Methods:

    • A modified umbelliferone method was employed using 20-micron thick brain sections.
    • Sections were exposed to umbelliferone-soaked paper strips.
    • Fluorescence imaging (excitation 370 nm and 340 nm, emission 450 nm) was captured photographically.

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  • A computerized image-processing system was used to subtract images and quantify regional fluorescence.
  • Regional pH values were calculated based on fluorescence ratios.

    • Main Results:

    • The developed technique enabled quantitative regional assessment of brain pH.
    • The method was successfully applied to measure brain pH in rats and cats.
    • The technique allowed for the evaluation of brain pH under both normal physiological and ischemic pathological conditions.

    Conclusions:

    • The modified umbelliferone method provides a viable approach for quantitative regional brain pH analysis.
    • This technique can be valuable for studying brain pathophysiology, particularly in conditions involving altered pH.
    • Further validation and application in diverse neurological research are warranted.