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Lipidomics and Transcriptomics in Neurological Diseases
Published on: March 18, 2022
Comparative lipidomics of mouse brain exposed to enriched environment
Yoshiaki Sato1, Francois Bernier, Ikumi Suzuki
1Eisai Company, Limited, Ibaraki 300-2635, Japan; and.
Journal of Lipid Research
|July 9, 2013
Summary
Environmental enrichment alters mouse brain lipid metabolism, particularly phospholipids in the prefrontal cortex. This study reveals region-specific lipid changes linked to memory function and potential insights into memory disorders.
Area of Science:
- Neuroscience
- Metabolomics
- Lipidomics
Background:
- Environmental housing conditions significantly impact animal behavior and brain function.
- Previous research focused on proteomic and transcriptomic changes, with limited understanding of brain metabolome alterations in response to environmental stimuli.
- Analyzing brain metabolome changes is complex, necessitating refined analytical methods.
Purpose of the Study:
- To investigate the impact of enriched versus impoverished housing conditions on the brain metabolome, specifically phospholipids and gangliosides, in mice.
- To establish a reliable method for analyzing these lipids in brain tissue.
- To explore the relationship between environmental enrichment, brain lipid changes, and memory function.
Main Methods:
- Lipidomic analysis focusing on phospholipids and gangliosides in mouse brain tissue.
- Optimization of a weak anion exchange cartridge prefractionation method for enhanced lipid analysis.
- Liquid chromatography-mass spectrometry (LC-MS) to profile metabolic signatures in the cerebral cortex and hippocampus.
- Behavioral assessment using the fear conditioning paradigm and brain immunohistochemistry to confirm memory differences.
Main Results:
- No significant alterations in ganglioside composition were observed in the cerebral cortex or hippocampus.
- Significant differences in phospholipids containing 22:6 fatty acid were identified in the prefrontal cortex of mice exposed to different housing conditions.
- Confirmed significant memory differences between the groups using fear conditioning and immunohistochemistry.
Conclusions:
- Environmental enrichment and impoverished housing represent a relevant model for studying aberrant lipid metabolism, particularly concerning docosahexaenoic acid (DHA).
- The study identified novel, region-specific phospholipid changes in the prefrontal cortex.
- These lipid alterations may be linked to changes in memory function and offer insights into the role of lipids in memory disorders.
