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Related Experiment Videos

Local cerebral glucose utilization during intracerebral pH changes.

D Van Nimmen, J Weyne, G Demeester

    Journal of Cerebral Blood Flow and Metabolism : Official Journal of the International Society of Cerebral Blood Flow and Metabolism
    |October 1, 1986
    PubMed
    Summary

    Altering cerebrospinal fluid (CSF) pH affects brain glucose metabolism. Acidic pH lowered local cerebral metabolic rate for glucose (LCMRglu), while alkaline pH increased it, impacting brain pH homeostasis.

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    Area of Science:

    • Neuroscience
    • Biochemistry
    • Physiology

    Background:

    • Cerebrospinal fluid (CSF) pH is critical for maintaining brain homeostasis.
    • Brain glucose metabolism is tightly regulated and sensitive to metabolic changes.

    Purpose of the Study:

    • To investigate the impact of altered cerebrospinal fluid (CSF) pH on local cerebral metabolic rate for glucose (LCMRglu) in rats.
    • To explore the role of brain glucose metabolism in pH regulation.

    Main Methods:

    • Ventriculocisternal perfusion with artificial cerebrospinal fluid (CSF) at varying pH levels (acidic, neutral, alkaline) in rats.
    • Measurement of local cerebral metabolic rate for glucose (LCMRglu) in the caudatoputamen.
    • Manipulation of CSF pH by altering bicarbonate ([HCO3-]) concentration.

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    Main Results:

    • Acidotic CSF significantly depressed LCMRglu in the caudatoputamen.
    • Alkalotic CSF strongly increased LCMRglu in the caudatoputamen.
    • Demonstrated a direct correlation between CSF pH and brain glucose metabolism.

    Conclusions:

    • Cerebrospinal fluid (CSF) pH directly influences brain glucose metabolism.
    • Alterations in brain glucose metabolism play a role in the homeostatic regulation of brain pH.
    • Findings highlight the sensitivity of neuronal metabolism to pH changes.