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Monitoring Astrocyte Reactivity and Proliferation in Vitro Under Ischemic-Like Conditions

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Published on: October 21, 2017

Impaired task-dependent cerebral cortex oxygenation in Glut1 deficiency.

Kosar Khaksari¹, Chad Blackshear², Ana Moreno Chaza³

¹Center for Experimental Neurotherapeutics, St. Jude Children's Research Hospital, Memphis, TN, United States.

Frontiers in Neuroscience

|July 10, 2026

Summary

Individuals with glucose transporter type 1 deficiency (G1D) show reduced brain oxygenation responses during cognitive tasks. Despite this, their cognitive performance is preserved, suggesting compensatory mechanisms at play.

Keywords:

Glut1 deficiency brain dysfunction fNIRS functional near infrared spectroscopy rare disease

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Published on: February 21, 2012

Area of Science:

Neuroscience
Metabolic Disorders
Neuroimaging

Background:

Neuronal activation demands increased glucose and oxygen.
Glucose transporter type 1 deficiency (G1D) impairs brain glucose availability.
Limited substrate may constrain neural activity in G1D.

Purpose of the Study:

To investigate neuroenergetic responses to cognitive tasks in G1D.
To compare cortical oxygenation in G1D patients and controls using fNIRS.

Main Methods:

Functional near-infrared spectroscopy (fNIRS) was used to measure task-evoked hemoglobin changes.
Individuals with G1D and age-matched controls performed standardized cognitive tasks.
Cortical activation and regional oxygenation were quantified.

Main Results:

G1D patients exhibited attenuated cortical oxygenation responses compared to controls.
Task-dependent metabolic responses were constrained in individuals with G1D.

Conclusions:

G1D is associated with altered neuroenergetic response to neural activation.
Preserved cognitive performance in G1D suggests adaptive or compensatory mechanisms.
fNIRS reveals functional brain differences in G1D.