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Related Experiment Videos

Is brain a gluconeogenic organ?

S B Bhattacharya1, A G Datta

  • 1Indian Institute of Chemical Biology, Calcutta.

Molecular and Cellular Biochemistry
|August 11, 1993
PubMed
Summary
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Goat brain tissue demonstrates gluconeogenesis, producing glucose from alanine. Hormones like glucagon and certain drugs influence this process, suggesting the brain may function as a gluconeogenic organ.

Area of Science:

  • Biochemistry
  • Neuroscience
  • Metabolic research

Background:

  • The brain primarily relies on glucose for energy.
  • Gluconeogenesis is the metabolic pathway for glucose synthesis, typically occurring in the liver.
  • The brain's capacity for glucose production has been historically underestimated.

Purpose of the Study:

  • To investigate the potential for gluconeogenesis in goat brain tissue.
  • To examine the effects of hormonal and pharmacological agents on brain glucose metabolism.
  • To determine if the brain possesses gluconeogenic capabilities.

Main Methods:

  • Measurement of key gluconeogenic enzyme activities (AAT, fru-P2ase, G-6-Pase) in goat brain tissue.
  • Administration of glucagon, alpha-agonists/antagonists (phenylephrine, phenoxybenzamine), and beta-antagonists (propranolol).

Related Experiment Videos

  • Assessment of glucose production from alanine in cerebral cortical slices.

    • Main Results:

    • Glucagon significantly increased alanine amino transferase (AAT), fructose-1,6-bisphosphatase (fru-P2ase), and glucose-6-phosphatase (G-6-Pase) activities.
    • Alpha-adrenergic agents phenylephrine and phenoxybenzamine also elevated AAT and G-6-Pase.
    • Cerebral cortical slices produced glucose from alanine, an effect potentiated by glucagon and alpha-adrenergic agents, and reversed by propranolol.

    Conclusions:

    • Goat brain tissue exhibits gluconeogenic activity, evidenced by glucose production from alanine.
    • Key gluconeogenic enzymes are present and modulated by hormonal and adrenergic signaling.
    • These findings suggest the brain functions as a gluconeogenic organ, albeit with lower efficiency compared to the liver.