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Pathogenesis of leukocytoclastic vasculitis
1Dermatology Clinic, University Hospital, Hôpital Edouard-Herriot, 69437 Lyon Cedex 03, France. claudy@cismsun.univ-lyon1.fr
European Journal of Dermatology : EJD
|July 3, 1998
Summary
Leukocytoclastic vasculitis involves immune complex deposition and neutrophil activation, leading to blood vessel damage. This hypersensitivity vasculitis highlights complex endothelial and leukocyte interactions in post-capillary venules.
Area of Science:
- Immunology
- Pathology
- Dermatology
Background:
- Leukocytoclastic vasculitis (LCV) is a form of hypersensitivity vasculitis.
- It shares similarities with the experimental Arthus reaction, involving immune complex deposition.
Purpose of the Study:
- To elucidate the pathomechanisms of leukocytoclastic vasculitis.
- To understand the role of endothelial cells, neutrophils, and immune mediators in LCV.
Main Methods:
- Review of animal and human experimental evidence.
- Analysis of immune complex formation and deposition.
- Examination of the roles of adhesion molecules, cytokines, complement, and neutrophils.
Main Results:
- Immune complexes deposit in vessel walls, triggering endothelial and neutrophil activation.
- Complement membrane attack complex and neutrophil enzymes/radicals damage vessel walls.
- Apoptotic cell death via the Fas/Bc12 system is observed in LCV.
Conclusions:
- Post-capillary venules orchestrate neutrophil activity in LCV.
- Endothelial/leukocyte interactions are central to LCV pathogenesis.
- The precise role of autoantibodies in LCV requires further investigation.