An Anatomically Resolved Mouse Brain Proteome Reveals Parkinson Disease-relevant Pathways

Area of Science:

• Neuroscience
• Proteomics
• Molecular Biology

Background:

• Understanding the mouse brain proteome is crucial for neuroscience research.
• Existing atlases lack detailed spatial resolution for specific neuroanatomical regions.
• Investigating regional differences in protein expression can reveal disease vulnerabilities.

Purpose of the Study:

• To create a comprehensive mouse brain protein atlas with high spatial resolution.
• To document the physiological repertoire of mouse brain proteins across distinct neuroanatomical regions.
• To explore the utility of this atlas in a mouse model of Parkinson's disease.

Main Methods:

• Surgically dissected 17 distinct neuroanatomical regions of the adult mouse brain (<1 mm³ each).
• Quantified protein expression levels for 6,500–7,500 gene products per region and >12,000 for the whole brain.
• Utilized spatially defined protein profiling and validated findings with an alternative method.

Main Results:

• Developed a proteomic atlas covering 17 mouse brain regions with detailed protein expression data.
• Identified spatiotemporal- and genotype-restricted protein changes in a Parkinson's disease mouse model.
• Validated key protein alterations, suggesting potential new research pathways.

Conclusions:

• The mouse brain protein atlas is a valuable resource for studying normal brain function.
• This atlas provides a framework for investigating regional vulnerability in neurological diseases.
• The identified protein changes offer insights into Parkinson's disease mechanisms.