Task Activation Results in Regional 13 C-Lactate Signal Increase in the Human Brain
Biorxiv : the Preprint Server for Biology
|February 14, 2024
Summary
Hyperpolarized 13C MRI detected increased 13C-lactate in activated brain regions during visual tasks. This imaging technique successfully measured metabolic changes in the brain, highlighting lactate production.
Area of Science:
- Neuroimaging
- Metabolic imaging
- Biochemistry
Background:
- Hyperpolarized 13C MRI (HP-13C MRI) offers a non-invasive method to study brain metabolism.
- Understanding brain metabolic changes during functional activation is crucial for neuroscience research.
Approach:
- HP-13C MRI was employed to image 13C-lactate, 13C-pyruvate, and 13C-bicarbonate production in healthy volunteers.
- A visual stimulus condition was compared against an eyes-closed control condition.
- BOLD-fMRI was used to identify functional activation regions for targeted analysis.
Key Points:
- A significant increase in 13C-lactate was observed in activated brain regions compared to the rest of the brain (p=0.02).
- No significant changes were detected in 13C-pyruvate or 13C-bicarbonate production.
- Metabolite signals were normalized to brainstem signals for quantitative comparison.
Conclusions:
- HP-13C MRI can effectively measure increased 13C-lactate production in metabolically active brain areas.
- This study demonstrates the utility of HP-13C MRI in visualizing functional metabolic responses in the brain.
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