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Tissue distribution of human IgG Fc receptors CD16, CD32 and CD64: An immunohistochemical study
Author(s) -
TUIJNMAN WOUTER B.,
WICHEN DICK F.,
SCHUURMAN HENKJAN
Publication year - 1993
Publication title -
apmis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.909
H-Index - 88
eISSN - 1600-0463
pISSN - 0903-4641
DOI - 10.1111/j.1699-0463.1993.tb00117.x
Subject(s) - pathology , biology , germinal center , cd16 , immunohistochemistry , high endothelial venules , antibody , follicular dendritic cells , spleen , tonsil , lymph node , microbiology and biotechnology , cd64 , chemistry , antigen , immunology , immune system , b cell , medicine , cd3 , antigen presenting cell , cd8 , t cell
The tissue distribution of human IgG Fc receptors (FcγRs) classified in three clusters of differentiation (CD16, using 5 antibodies, CD32, using 2 antibodies; and CD64, using 3 antibodies) was evaluated by immunohistochemistry on lymphoid (lymph node, spleen, thymus, tonsil) and non‐lymphoid (heart, jejunum, kidney, liver, lung, muscle, stomach, and skin) tissues. Macrophage‐like cells, including Kupffer cells, expressed all three classes of FcγR. Part of the cells coexpressed HLA‐DR. Interdigitating dendritic cells that were present in high density in interfollicular areas of a lymph node showing dermatopathic lymphadenopathy were immunoreactive for CD32, but not for CD16 or CD64 antibodies. In lymphoid tissue, mantle zones of secondary follicles were labelled by CD32 and some CD16 antibodies. The immunolabelling of mantle zones was not present after washing the sections at low pH, which suggests that the molecules detected were passively absorbed on the cell surface (i.e. soluble FcγR). The immunolabelling of tonsil sections by various CD16 antibodies showed three patterns. The first (anti‐Leu‐11b) revealed labelling of solitary macrophage‐like cells. The second (BW209/2 and 3G8) revealed, in addition, labelling of germinal centres. The third (CLBgranI and CLBgranII) revealed labelling of solitary cells and follicle mantles. This labelling on tissue sections was also seen in the analysis of follicular dendritic cells isolated from tonsil. The cells were faintly immunoreactive for 3G8, as well as for CD16 mAb CLBgranl, and both CD32 mAbs. In all tissues investigated there was immunoreactivity for FcγRs in varying intensity on endothelial cells of blood vessels.