Related Experiment Videos
Plasminogen activator system in pemphigus vulgaris
B M Schaefer1, C J Jaeger, M D Kramer
1University Institute for Immunology, Laboratory for Immunopathology, Heidelberg, Germany.
The British Journal of Dermatology
|November 1, 1996
Summary
Pemphigus vulgaris (PV) involves autoantibodies causing skin blisters. This study reveals plasminogen activators and inhibitors are differentially regulated in acantholytic keratinocytes, offering new insights into PV pathology.
Area of Science:
- Dermatology
- Molecular Biology
- Biochemistry
Background:
- Pemphigus vulgaris (PV) is an autoimmune blistering disease.
- PV pathology is associated with plasminogen activation in lesional epidermis.
- The plasminogen activator (PA) system, including urokinase-type plasminogen activator (uPA), tissue-type PA (tPA), and plasminogen activator inhibitors (PAI-1, PAI-2), plays a role in pericellular proteolysis.
Purpose of the Study:
- To investigate the topographical organization of PA system components in lesional epidermis of Pemphigus vulgaris.
- To understand the differential regulation of PA system components in keratinocytes involved in blister formation.
Main Methods:
- Immunohistological analysis of lesional and non-lesional epidermis from PV patients.
- Detection of plasmin(ogen), uPA receptor (uPA-R), uPA, and PAI-2 in keratinocytes.
Main Results:
- Plasmin(ogen) was detected in 9/10 acantholytic keratinocytes.
- uPA-R and uPA were found in 4/10 cases, while PAI-2 was present in 7/10 cases.
- Three distinct phenotypes of acantholytic keratinocytes regarding PA system component expression were identified.
Conclusions:
- The study demonstrates differential regulation of PA system components (PAs and PAIs) in acantholytic keratinocytes of Pemphigus vulgaris.
- These findings contribute to understanding the molecular mechanisms underlying epidermal splitting in PV.