Normal Mouse Brain Proteome II: Analysis of Brain Regions by High-resolution Mass Spectrometry

Area of Science:

• Neuroscience
• Proteomics
• Biochemistry

Background:

• The central nervous system exhibits complex organization and diversity.
• Proteomics offers insights into this complexity.
• Understanding regional brain proteomes is crucial.

Purpose of the Study:

• To identify the whole-proteome content of specific mouse brain regions.
• To create a comprehensive proteomic map of the normal mouse brain.

Main Methods:

• High-resolution mass spectrometry (MS) was employed.
• Nano-liquid chromatography-MS/MS Orbitrap elite technology was utilized.
• Brains from eight 8-week-old C57BL/6N normal male mice were analyzed.

Main Results:

• A total of 16,574 proteins were identified across seven distinct brain regions.
• The cerebral cortex had 2,795 identified proteins, with 534 unique to this region.
• Other regions like the olfactory bulb, hippocampus, hypothalamus, midbrain, cerebellum, and medulla also showed distinct proteomic profiles.

Conclusions:

• The study provides the most comprehensive proteomic map of the normal mouse brain to date.
• These proteomic data can serve as a valuable resource for future research.
• The findings are applicable to studies on brain diseases, including cancer and neurodegenerative disorders.