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An electron microscopic study on the reticuloendothelial cells in the lymph nodes
Acta Pathologica Japonica
|May 1, 1981
Summary
This study distinguishes histiocytes from reticulum cells in lymph nodes based on cellular features and developmental origins. These distinct cell types differentiate early, impacting lymph node development and lymphocyte formation.
Area of Science:
- Immunology
- Cell Biology
- Developmental Biology
Background:
- The Reticuloendothelial System (RES) comprises diverse cells within lymph nodes.
- Cytological characteristics and embryological origins of RES cells require clarification.
Purpose of the Study:
- To differentiate histiocytes from reticulum cells in lymph nodes.
- To elucidate the embryological correlations of these cells.
Main Methods:
- Light and electron microscopy.
- Examination of lymph nodes and anlages from germ-free rats, nude mice, and human fetuses.
Main Results:
- Histiocytes and reticulum cells exhibit distinct intracellular organelles, reticulum fiber interactions, and endogenous peroxidatic activity.
- Reticulum cells and histiocytes follow separate differentiation pathways from early lymph node development.
- Sinus endothelial cells originate from lymphatic vessel endothelial lining.
Conclusions:
- Histiocytes and reticulum cells are distinct cell populations with divergent developmental fates.
- Primitive reticular cells differentiate into mature reticulum cells, lympho-reticular cells, lymphoblasts, and lymphocytes.
- Understanding these cellular distinctions is crucial for lymph node development and function.