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Distinctive adhesion pathways are involved in epitheliotropic processes at different sites
L H Jaspars1, R C Beljaards, P Bonnet
1Department of Pathology, Free University Hospital, Amsterdam, Netherlands.
The Journal of Pathology
|April 1, 1996
Summary
Lymphocyte migration into tissues (epitheliotropism) involves cell adhesion. Different diseases utilize specific adhesion molecules for lymphocyte-epithelial interactions, indicating a tailored process.
Area of Science:
- Immunology
- Cell Biology
- Pathology
Background:
- Epitheliotropism, the intraepithelial migration of lymphoid cells, occurs in various physiological and pathological states.
- This process is understood as a multi-step mechanism involving lymphoid cell interactions with the epithelial basement membrane (EBM) and epithelial cells.
Purpose of the Study:
- To investigate the adhesion mechanisms underlying epitheliotropism in diverse conditions.
- To analyze the roles of specific adhesion molecules in lymphocyte-epithelial and lymphocyte-EBM interactions.
Main Methods:
- Immunohistochemistry was employed to examine adhesion molecule expression.
- The study analyzed lymphoid cells and epithelial cells in tonsillar hyperplasia, coeliac disease, MALTomas, and mycosis fungoides (MF).
Main Results:
- Adhesion molecule combinations varied significantly across the studied disorders.
- Specific interactions were identified: alpha 3 beta 1 integrin/laminin-5 in MF, alpha 4 integrin/VCAM-1 in tonsillar hyperplasia, and alpha E beta 7/E-cadherin in coeliac disease.
Conclusions:
- The adhesion pathways in epitheliotropism are associated with the type of lymphoid cell (reactive, neoplastic, B, or T) and the epithelial site.
- These findings highlight the diverse molecular mechanisms governing lymphocyte migration in different pathological contexts.