Human myelin proteome and comparative analysis with mouse myelin
Akihiro Ishii1, Ranjan Dutta, Greg M Wark
1Departments of Neuroscience and Cell Biology and Center for Vascular Biology, University of Connecticut Medical School, Farmington, CT 06030, USA.
Summary
This study identifies 308 proteins in human myelin, offering a comprehensive resource for understanding myelin function and diseases like multiple sclerosis. The findings enhance our knowledge of the central nervous system
Area of Science:
- Neuroscience
- Proteomics
- Cell Biology
Background:
- Myelin, produced by oligodendrocytes (OLs), is vital for central nervous system (CNS) axonal function.
- Damage to myelin causes neurological disorders, including multiple sclerosis.
- Limited knowledge of human myelin proteins hinders understanding of myelination and myelin diseases.
Purpose of the Study:
- To conduct a large-scale analysis of the human myelin proteome.
- To identify and functionally characterize human myelin proteins.
- To provide a resource for studying demyelinating diseases.
Main Methods:
- Shotgun proteomics approach using 1D PAGE and liquid chromatography/tandem MS.
- Comparative microarray analysis of human white and gray matter.
- Bioinformatic comparisons with existing databases and previous myelin proteome studies.
- Immunoblotting for verification of selected proteins.
Main Results:
- Identified 308 common proteins in human and mouse myelin fractions.
- Confirmed enrichment of several identified protein transcripts in OL-rich white matter.
- Found 111 identified proteins/transcripts specifically expressed in OLs.
- Validated over 50% of identified proteins against previous studies and discovered 163 new proteins.
Conclusions:
- The study provides a comprehensive catalog of human myelin proteins.
- These findings offer insights into the complexity of the myelin membrane.
- This resource is valuable for future research on myelin biology and demyelinating diseases.
