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Peroxidase arthritis. II. Lymphoid cell-endothelial interactions during a developing immunologic inflammatory
The American Journal of Pathology
|October 1, 1972
Summary
Lymphoid cells interact with vascular endothelium during immunologic synovitis, migrating through vessel walls. Endothelial cell changes occur but their role in this process requires further investigation.
Area of Science:
- Immunology
- Vascular Biology
- Cell Biology
Background:
- Immunologic synovitis involves the immune system's response within joint tissues.
- Understanding lymphoid cell interactions with blood vessels is crucial for immune responses.
Purpose of the Study:
- To investigate the interaction between lymphoid cells and vascular endothelium during immunologic synovitis.
- To characterize the morphological changes in endothelial cells during this process.
Main Methods:
- Repeated intraarticular injections of a heterologous protein antigen in rabbits.
- Microscopic examination of venules and small veins to observe lymphoid cell emigration and endothelial cell morphology.
Main Results:
- Lymphoid cells emigrated through endothelial cytoplasm and intercellular junctions.
- Endothelial cells showed increased mitoses, proliferation, and cytoplasmic changes.
- These changes were transient, receding despite continued antigen exposure, with new vessel growth observed later.
Conclusions:
- Endothelial cell changes are likely a result of lymphoid cell emigration, not the cause.
- Further research is needed to fully understand the complex endothelial-lymphoid cell interactions in synovitis.