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Updated: Jun 29, 2026

Metabolomic Analysis of Rat Brain by High Resolution Nuclear Magnetic Resonance Spectroscopy of Tissue Extracts
Published on: September 21, 2014
Proteome Profiling of Rat Brain Cortical Changes during Early Postnatal Brain Development.
Witold M Winnik1, William Padgett1, Emily M Pitzer1
1Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, United States.
This study used label-free quantitation (LFQ) to profile rat brain development, finding significant similarities between rat and mouse cortex proteomes. Male and female rat brain profiles showed high correlation, validating the LFQ method.
Area of Science:
- Neuroscience
- Proteomics
- Developmental Biology
Background:
- Early postnatal brain development involves complex proteomic changes.
- Understanding species-specific proteomic profiles is crucial for comparative neuroscience.
- Label-free quantitation (LFQ) offers a sensitive method for proteome analysis.
Purpose of the Study:
- To profile proteome changes in developing rat cortex from postnatal days 2 to 22.
- To compare rat brain proteomic data with published mouse data.
- To validate the LFQ approach for brain development studies.
Main Methods:
- Proteome profiling using label-free quantitation (LFQ) on rat brain cortical extracts.
- Detergent-free sample preparation for postnatal days (PND) 2, 8, 15, and 22.
- Comparative analysis using Proteome Discoverer, Pearson correlation coefficient (PCC), and linear regression.
Main Results:
- Identified similarities and differences between rat and mouse cortex proteomic profiles.
- Observed generally lower abundance of synaptic proteins in mice compared to rats.
- Demonstrated high correlation (98-99% by PCC) between male and female rat brain profiles.
Conclusions:
- LFQ is a robust method for analyzing brain development proteomes.
- Rat and mouse cortex proteomes show conserved developmental trends.
- Species-specific differences in synaptic protein abundance exist during early development.
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