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Apoptosis in histiocytic necrotizing lymphadenitis
Q Liu1, K Ohshima, T Shinohara
1First Department of Pathology, School of Medicine, Fukuoka University, Japan.
Pathology International
|October 1, 1995
Summary
Histiocytic necrotizing lymphadenitis (HNL) involves two cell death patterns: apoptosis and necrosis. Apoptosis, particularly in T lymphocytes, is a key pathological feature of HNL.
Area of Science:
- Pathology
- Immunology
- Cell Biology
Background:
- Cell death is classified into necrosis and apoptosis, differing in morphology, biochemistry, and biological roles.
- Histiocytic necrotizing lymphadenitis (HNL) is a condition where understanding cell death mechanisms is crucial.
Purpose of the Study:
- To investigate the patterns and characteristics of cell death in histiocytic necrotizing lymphadenitis (HNL).
- To identify the specific cell types undergoing apoptosis in HNL.
Main Methods:
- Histomorphology and ultrastructural analysis of 10 HNL cases.
- In situ apoptosis detection using ApopTag staining.
- Double staining to identify cell types undergoing apoptosis.
Main Results:
- Two distinct cell death patterns were observed: apoptosis and necrosis.
- Apoptosis, characterized by cell shrinkage and chromatin condensation, was present in all cases.
- ApopTag staining confirmed apoptosis in T lymphocytes, which were also identified as the main proliferative cells.
Conclusions:
- Apoptosis is a significant form of cell death in HNL.
- T lymphocytes play a central role in the pathology of HNL through proliferation and apoptosis.
- The main pathological features of HNL include T lymphocyte apoptosis and proliferation.