Related Experiment Video
Updated: Jul 17, 2026
Ex vivo Imaging of T Cells in Murine Lymph Node Slices with Widefield and Confocal Microscopes
Published on: July 15, 2011
Immunohistochemical study of the reticular and vascular network of mouse lymph node using vibratome sections
Bin Ma1, Jadwiga Jablonska, Werner Lindenmaier
1Gene Regulation and Differentiation, Helmholtz Centre for Infection Research, Inhoffenstrasse 7, D-38124 Braunschweig, Germany. bma@gbf.de
Insights
This study maps the 3D structure of lymph node fibers, revealing how extracellular matrix proteins organize immune cell compartments. Understanding this architecture is key for immune cell function in both health and disease.
Area of Science:
- Immunology
- Cell Biology
- Histology
Background:
- Lymph node function depends on intricate microanatomy, with cells organized by a network of fibers, vessels, and nerves.
- The precise spatial arrangement of non-immune cells influences immune cell behavior.
Purpose of the Study:
- To investigate the molecular organization and distribution of the reticular fiber system within lymph nodes.
- To visualize the 3D architecture of lymph node compartments and their vasculature.
- To examine changes in lymph node structure during pathological conditions.
Main Methods:
- Utilized antibodies against extracellular matrix proteins (fibronectin, collagen IV, laminin), perlecan, and ERTR-7.
- Employed three-dimensional (3D) reconstruction techniques.
- Reconstructed various lymph node compartments, including B-cell follicles, paracortex, medulla, and germinal centers in reactive lymph nodes.
Main Results:
- Fibronectin, collagen IV, and laminin are localized to reticular fibers with similar distribution.
- Perlecan is specifically found within the lymph node's vascular system.
- Detailed 3D visualizations of lymph node vasculature relative to immune cells were achieved.
- Structural alterations in reactive lymph nodes, particularly germinal centers, were observed.
Conclusions:
- The study provides a detailed 3D map of non-immune components in lymph nodes.
- This understanding is crucial for comprehending cell adhesion, migration, activation, and differentiation.
- The findings are relevant for both normal physiological processes and pathological conditions affecting lymph nodes.
Abstract:
The function of lymph nodes is greatly influenced by their unique microanatomy, in which distinct subpopulations of cells are compartmentalized by a meshwork of reticular cells and fibres, specialized blood and lymphatic vessels and nerves. Using antibodies against extracellular matrix (ECM) proteins (fibronectin, collagen IV and laminin), proteoglycan (perlecan), and a fibroblastic marker (ERTR-7), the distribution and molecular organization of the system of reticular fibres was investigated by three-dimensional (3D) reconstruction methods. Fibronectin, collagen IV and laminin are restricted to reticular fibres and have a similar distribution pattern, whereas perlecan is limited to the vascular system of the lymph node. Various compartments of the lymph node, such as the B-cell follicle, paracortex (including the high endothelial venules and paracortical cord), and medulla have been reconstructed to visualize their vasculature with respect to B and T cells. Since the morphology of lymph nodes may change significantly in pathological conditions, different compartments of reactive lymph node (after low-dose Listeria monocytogenes infection), especially germinal centres, were also investigated. The data presented here should facilitate our understanding of the 3D organization of non-immune cell components of lymph nodes, which is crucial for cell adhesion, migration, activation, and differentiation in normal and pathological conditions.
