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Immunohistochemical and functional studies on rat high endothelial venules using monoclonal antibodies

, : Immunohistochemical and functional studies on rat high endothelial venules using monoclonal antibodies. Virchows Archiv B Cell Pathology Including Molecular Pathology. 63(5): 297-306

The distribution of high endothelial venules (HEVs) in various rat organs has been investigated immunohistochemically using two monoclonal antibodies (MoAbs), REC16-11 and REC4-1. The staining patterns observed with REC16-11 nad REC4-1 were compared with those obtained with the MoAb anti-rat ICAM-1, which is a cell adhesion molecule in HEVs. REC16-11 reacted not only with HEVs but also with all vascular endothelial cells (ECs) in the tissues examined. Electronmicroscopy showed that REC16-11 and REC4-1 reacted with the cell surface antigens of ECs and immunoblot analysis of rat splenic stromal preparations showed that REC4-1 stained 42 kd and 60 kd bands. REC4-1 inhibited the binding of lymphocyte to HEVs in the mucosa-associated lymphoid tissues (MALT), but had no effects on lymphocyte binding to HEVs in peripheral (non-mucosal) lymph nodes. These findings suggested that the MoAb REC4-1 recognized the associated antigen of the lymphocyte-HEV recognition system in MALT.


PMID: 8100100

DOI: 10.1007/bf02899276

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