Macrophage-lymphocyte clusters in lymph nodes: a possible substrate for cellular interactions in the immune response.

The American Journal of Anatomy
A G Farr, P P De Bruyn

Abstract

The lumens of the lymphatic sinuses in lymph nodes are traversed by fibrocellular trabeculae. Joined to these trabeculae were macrophages, which formed cell clusters with lymphocytes. It is proposed, based on structural similarities, that these cell clusters are the equivalent in vivo to those seen during primary and secondary immune responses in vitro. These intraluminal macrophages were located in the path of lymph-borne antigen, as well as in the path of newly formed and recirculating lymphocytes in sinuses. This would facilitate the possible interaction between macrophage-associated antigen and antigen-reactive lymphoid cells. The attachment of numerous lymphocytes to the surfaces of macrophages and the resulting cell clusters also afford increased opportunities for lymphocyte-lymphocyte contact.

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May 1, 1981·Acta Pathologica Japonica·H SakumaM Kojima
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Aug 1, 1990·AIDS Research and Human Retroviruses·D J Mock, N J Roberts

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