Inside the Brain’s Hidden Lipid Map

Spatial mass spectrometry reveals how 172 lipids vary across brain regions, cell types, and physiological states

Category	Detail
Condition	Spatial organization of lipids in the adult mouse brain
Key Mechanisms	Lipids form cell membranes and are major components of myelin, axons, dendrites, and synapses; their abundance varies across brain regions and physiological states.
Target Population	Adult mice; the atlas is intended to support research into lipid variation and neurological disease.
Care Setting	Preclinical research using brain-tissue imaging; the atlas does not establish diagnostic biomarkers or clinical use.

MALDI-MSI was used to analyze 109 brain sections from 11 mice, generating lipid data from 7.2 million locations.
Of 26,874 detected mass spectral peaks, 1,400 passed noise-quality checks; downstream analyses focused on 172 high-confidence, nonredundant lipids.
Computational analysis identified 539 lipid-defined regions, termed lipizones, that distinguished anatomical areas including grey matter, white matter, and cortical layers.
Lipid patterns varied across white matter and included patterns linking distant but connected brain regions.
Pregnancy was associated with broader lipid changes than differences between male and nonpregnant female mice, including altered white-matter sphingolipid signals and localized remodeling in cortical layer 4.

The atlas may support future comparisons with mouse models of neurodegenerative, demyelinating, metabolic, or inflammatory disease.

Interpret lipid concentrations in anatomical context because baseline abundance and potential biological roles may differ by brain region.
Consider physiological state, including pregnancy, when interpreting lipid measurements.

Not applicable; this is a preclinical study of adult mice, not a patient treatment study.

No treatments or prescribing data are reported.

For lipid biomarker research, select and report sampling locations with attention to anatomical context.
Distinguish disease-associated changes from normal regional variation when interpreting tissue-based lipidomic results.
Validate findings from the mouse atlas in human tissue and clinical samples before clinical application.