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HLA-DR antigen detection in giant cell lesions
Journal of Oral Pathology
|September 1, 1986
Summary
Human Leukocyte Antigen (HLA)-DR expression was found in most giant cell lesions, primarily on macrophage-like cells. This marker did not effectively differentiate between inflammatory and neoplastic types of these lesions.
Area of Science:
- Immunohistochemistry
- Pathology
- Cell Biology
Background:
- Giant cell lesions encompass a spectrum from inflammatory to neoplastic conditions.
- Understanding the cellular markers in these lesions is crucial for diagnosis.
- Human Leukocyte Antigen (HLA)-DR is an important cell surface marker expressed on antigen-presenting cells.
Purpose of the Study:
- To evaluate the expression of HLA-DR antigens in various giant cell lesions.
- To determine if HLA-DR expression can help distinguish between different types of giant cell lesions.
Main Methods:
- Formalin-fixed, paraffin-embedded tissues from 66 giant cell lesions were analyzed.
- Immunohistochemistry using a monoclonal antibody and avidin-biotin peroxidase labeling was performed.
- Expression of HLA-DR antigens was assessed on different cell types within the lesions.
Main Results:
- HLA-DR antigens were detected in nearly all evaluated giant cell lesions.
- Expression was predominantly observed on round, macrophage-like cells.
- Granulomatous inflammatory lesions showed higher immunoreactivity compared to non-inflammatory lesions.
- Multinucleate giant cells exhibited less reactivity in non-inflammatory lesions than in inflammatory ones.
Conclusions:
- HLA-DR antigen expression is a common feature across various giant cell lesions.
- The observed expression patterns do not appear to be a reliable diagnostic tool for differentiating between inflammatory and neoplastic giant cell lesions.