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Immunohistochemical analysis of human peripheral blood and lymphoid tissues using monoclonal antibodies immunoreactive with non-lymphoid cells
Authors:R Giorno
Abstract:Immunoperoxidase methods were used to study human peripheral blood and lymphoid tissues using a panel of monoclonal antibodies to non-lymphoid cells. The majority of peripheral blood monocytes were immunoreactive for LeuM1, LeuM2, LeuM3 and LeuM5. Rare peripheral blood monocytes were immunoreactive for R4/23. The different antibodies showed characteristic patterns of immunoreactivity in peripheral lymphoid tissues. LeuM1 was immunoreactive with scattered cells in the paracortex of lymph node and tonsil and with many cells in the marginal zone of the spleen. LeuM2 was immunoreactive with endothelial cells in lymph node and tonsil. A few cells in the red pulp of the spleen were immunoreactive for LeuM2. LeuM3 and R4/23 showed distinctive immunoreactivity in germinal centers of secondary follicles, giving a "lacy" pattern. LeuM3 was also immunoreactive with endothelium in lymph node and tonsil and with sinus lining cells in lymph node. LeuM5 was immunoreactive with macrophages in the germinal center, fibroblastic reticulum cells in the mantle zone and interdigitating reticulum cells in the paracortex of lymph node and tonsil.
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