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Function and cell surface phenotype of dendritic cells from rat cornea
A Choudhury1, V A Pakalnis, W E Bowers
1Department of Microbiology & Immunology, University of South Carolina School of Medicine, Columbia 29208, USA.
Investigative Ophthalmology & Visual Science
|December 1, 1995
Summary
Dendritic cells (DC) isolated from rat corneas are functionally active after injury, suggesting a role in corneal immune regulation. Cytokines like IL-1 beta and GM-CSF enhance their activity.
Area of Science:
- Immunology
- Ophthalmology
- Cell Biology
Background:
- Dendritic cells (DCs) are crucial immune regulators.
- The role of corneal DCs in ocular immunity is not fully understood.
Purpose of the Study:
- To isolate and characterize rat corneal dendritic cells (DCs).
- To investigate the function and surface markers of corneal DCs in vitro.
- To examine the in vivo migration and activation of corneal DCs following epithelial injury.
Main Methods:
- Enzymatic isolation and immunomagnetic enrichment of DCs from rat corneas.
- In vitro functional assays, including lymphocyte stimulation.
- In vivo induction of DC migration via corneal epithelial trauma, followed by immunofluorescence and confocal microscopy.
- Assessment of cytokine effects (IL-1 beta, GM-CSF) on DC function.
Main Results:
- Corneal DCs possess lymphoid DC-specific markers and lymphostimulatory function.
- Isolated DCs from fresh corneal preparations showed functional activity.
- Corneal epithelial injury induced DC migration to the central cornea with increased functional activity.
- IL-1 beta and GM-CSF enhanced the functional activity of corneal DCs.
Conclusions:
- Corneal DCs exhibit lymphostimulatory capacity, potentially suppressed by neighboring cells in normal conditions.
- Epithelial injury activates corneal DCs, possibly mediated by cytokines like IL-1 beta and GM-CSF.
- Corneal DCs play a significant role in the immune regulation of the anterior segment of the eye.