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Journal of Histochemistry and Cytochemistry, Vol. 48, 923-932, July 2000, Copyright © 2000, The Histochemical Society, Inc.

ARTICLE

Lectin Histochemistry of the Spleen: A New Lectin Visualizes the Stromal Architecture of White Pulp and the Sinuses of Red Pulp

Jochen Düllmanna, Susanne Feldhausa, Els J. M. Van Dammeb, Willy J. Peumansb, and Udo Schumachera
a Institut für Anatomie, Universitäts-Krankenhaus Eppendorf, Hamburg, Germany
b Laboratorium voor Fytopathologie en Plantenbescherming, Katholieke Universiteit Leuven, Leuven, Belgium

Correspondence to: Jochen Düllmann, Institut für Anatomie, Universitäts-Krankenhaus Eppendorf, Martinistr. 52, D 20246 Hamburg, Germany.

The subcompartmentalization of the white pulp in the spleen is the result of interactions of specific resident stromal cells and migrating subtypes of lymphocytes. Because carbohydrate residues of cell membranes and extracellular matrices are involved in cell–cell and cell–matrix interactions, they were investigated in rat spleen by a broad panel of lectins. Splenic macrophages, which were also demonstrated by Perls' Prussian blue reaction, were labeled selectively by most mannose-specific lectins and gave the characteristic distribution patterns in all splenic (sub)compartments. One recently isolated lectin, Chelidonium majus agglutinin (CMA), visualized predominantly central arterioles, the reticular meshwork (RM) in the periarteriolar lymphatic sheaths (PALS), the circumferential reticulum cells limiting PALS and follicles, and some follicular dendritic cells (FDCs) in white pulp. The endothelial cells of venous sinuses in red pulp were also labeled by CMA and, if frozen sections were used, CMA also labeled the macrophages of the red pulp. Compared to CMA, the monoclonal antibody CD11, which can be used only in frozen sections, stained almost solely the fibrous (extracellular) component of the RM. Because CMA stains the reticulum cells in particular, it is better suited to visualize the stromal architecture of splenic white pulp than the monoclonal antibody. Because CMA can be applied to paraffin-embedded material, it is a particularly useful tool to study the splenic stromal architecture in archival material. (J Histochem Cytochem 48:923–931, 2000)

Key Words: spleen, stromal architecture, follicular dendritic cells, macrophages, lectins


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