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Related Experiment Videos

Glucose transporter proteins in brain

F Maher1, S J Vannucci, I A Simpson

  • 1National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892.

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
|October 1, 1994
PubMed
Summary

Brain glucose transporters like GLUT1, GLUT3, and GLUT5 are crucial for supplying energy to neurons and glia. Their specific expression patterns in brain cells influence overall cerebral metabolic activity.

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Biochemistry

Background:

  • Glucose is the primary energy source for the mammalian brain.
  • Glucose transport proteins are vital for supplying neurons and glia with glucose.
  • At least three glucose transporter isoforms are known to play significant roles in the brain.

Purpose of the Study:

  • To review the current understanding of cell-specific glucose transporter expression in the brain.
  • To discuss the implications of glucose transporter heterogeneity for cerebral metabolic activity.

Main Methods:

  • Literature review of studies on glucose transporter expression in the brain.
  • Analysis of cell-specific expression patterns of GLUT1, GLUT3, and GLUT5.

Main Results:

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  • GLUT1 (55-kDa) is highly expressed at the blood-brain barrier and in parenchymal cells (45-kDa), likely in astrocytes.
  • GLUT3 is expressed in neurons.
  • GLUT5 is expressed in microglia.

Conclusions:

  • Distinct glucose transporter isoforms are localized to specific cell types within the brain.
  • This cell-specific expression pattern of glucose transporters (GLUT1, GLUT3, GLUT5) is important for regulating cerebral metabolic activity.