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Molecular Imaging of Human Brain Organoids Using Mass Spectrometry

Molecular Imaging of Human Brain Organoids Using Mass Spectrometry

Published on: September 27, 2024

Is there a path beyond BOLD? Molecular imaging of brain function.

Alan P Koretsky¹

¹Laboratory of Functional and Molecular Imaging, National Institutes of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA. koretskya@ninds.nih.gov

|March 13, 2012

Summary

Magnetic Resonance Imaging (MRI) struggles to directly monitor brain function due to its reliance on neuro-vascular coupling. Despite innovative molecular imaging tools, a robust human brain MRI method for direct neuronal monitoring remains elusive.

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Area of Science:

Neuroscience
Medical Imaging
Biochemistry

Background:

Blood-Oxygen-Level-Dependent (BOLD) functional Magnetic Resonance Imaging (fMRI) indirectly measures neural activity through neuro-vascular coupling.
This indirect relationship presents limitations in precisely monitoring neuronal function.
Developing direct MRI-based measures of brain function is a key research goal.

Observation:

Various MRI-based techniques have been explored to more directly assess brain function.
These include manganese-enhanced MRI, calcium-sensitive agents, membrane potential probes, neurotransmitter sensors, and gene expression imaging strategies.
Significant advancements in molecular imaging tools have been achieved, particularly for animal models.

Findings:

Despite progress, a universally robust MRI approach for directly imaging neuronal activity in the human brain has not yet been established.
Current methods, while innovative, still face challenges in achieving direct neuronal proximity and reliable measurement in humans.

Implications:

The development of direct neuronal monitoring MRI techniques could revolutionize brain research and clinical diagnostics.
Such advancements hold the potential for more accurate understanding of neurological disorders and treatment efficacy.
Further innovation is needed to bridge the gap between current molecular imaging capabilities and direct neuronal observation in humans.