The myelin water imaging transcriptome: myelin water fraction regionally varies with oligodendrocyte-specific gene expression.
Gene expression
Myelin
Myelin water fraction
Myelin water imaging
Neuroimaging transcriptomics
Transcriptome
White matter
Journal
Molecular brain
ISSN: 1756-6606
Titre abrégé: Mol Brain
Pays: England
ID NLM: 101468876
Informations de publication
Date de publication:
23 Jul 2024
23 Jul 2024
Historique:
received:
28
02
2024
accepted:
19
06
2024
medline:
24
7
2024
pubmed:
24
7
2024
entrez:
23
7
2024
Statut:
epublish
Résumé
Identifying sensitive and specific measures that can quantify myelin are instrumental in characterizing microstructural changes in neurological conditions. Neuroimaging transcriptomics is emerging as a valuable technique in this regard, offering insights into the molecular basis of promising candidates for myelin quantification, such as myelin water fraction (MWF). We aimed to demonstrate the utility of neuroimaging transcriptomics by validating MWF as a myelin measure. We utilized data from a normative MWF brain atlas, comprised of 50 healthy subjects (mean age = 25 years, range = 17-42 years) scanned at 3 Tesla. Magnetic resonance imaging data included myelin water imaging to extract MWF and T1 anatomical scans for image registration and segmentation. We investigated the inter-regional distributions of gene expression data from the Allen Human Brain Atlas in conjunction with inter-regional MWF distribution patterns. Pearson correlations were used to identify genes with expression profiles mirroring MWF. The Single Cell Type Atlas from the Human Protein Atlas was leveraged to classify genes into gene sets with high cell type specificity, and a control gene set with low cell type specificity. Then, we compared the Pearson correlation coefficients for each gene set to determine if cell type-specific gene expression signatures correlate with MWF. Pearson correlation coefficients between MWF and gene expression for oligodendrocytes and adipocytes were significantly higher than for the control gene set, whereas correlations between MWF and inhibitory/excitatory neurons were significantly lower. Our approach in integrating transcriptomics with neuroimaging measures supports an emerging technique for understanding and validating MRI-derived markers such as MWF.
Identifiants
pubmed: 39044257
doi: 10.1186/s13041-024-01115-4
pii: 10.1186/s13041-024-01115-4
doi:
Substances chimiques
Water
059QF0KO0R
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
45Informations de copyright
© 2024. The Author(s).
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