Related Experiment Videos
A human endothelial cell-restricted, externally disposed plasmalemmal protein enriched in intercellular junctions
W A Muller1, C M Ratti, S L McDonnell
1Laboratory of Cellular Physiology and Immunology, Rockefeller University, New York, New York 10021.
The Journal of Experimental Medicine
|August 1, 1989
Summary
Researchers identified a novel 135-kD membrane protein enriched in endothelial cell junctions. This protein may play a role in endothelial-specific functions and serve as a unique marker for human endothelial cells.
Area of Science:
- Cell Biology
- Immunology
- Vascular Biology
Background:
- Endothelial cells form the inner lining of blood vessels.
- Intercellular junctions are critical for maintaining endothelial barrier function.
- Novel cell surface markers are needed for endothelial cell research and applications.
Purpose of the Study:
- To characterize a newly identified integral membrane protein in human endothelial cells.
- To investigate the localization and expression pattern of this novel protein.
- To explore its potential role in endothelial cell biology and as a cell surface marker.
Main Methods:
- Monoclonal antibody (mAb) generation against the target protein.
- Immunocytochemistry and immunofluorescence for protein localization.
- Analysis of protein expression in cultured cells and human tissues.
Main Results:
- A novel 135-kD integral membrane protein was identified and characterized.
- The protein is enriched in the intercellular junctional domain of endothelial cells.
- It is stably expressed in endothelial cell junctions and present on all human blood vessel endothelia, but not other cell types.
Conclusions:
- This protein may mediate endothelial-specific functions within the intercellular domain.
- It represents a unique cell surface marker for identifying and purifying human endothelial cells.
- Further research into its function could reveal new therapeutic targets for vascular diseases.