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Patterns of major histocompatibility complex class II expression on T cell subsets in different immunological compartments 1. Expression on resting T cells
Author(s) -
Dutia Bernadette M.,
McConnell Ian,
Bird Kay,
Keating Paula,
Hopkins John
Publication year - 1993
Publication title -
european journal of immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.272
H-Index - 201
eISSN - 1521-4141
pISSN - 0014-2980
DOI - 10.1002/eji.1830231123
Subject(s) - biology , cd8 , lymph node , major histocompatibility complex , mhc class ii , t cell , immunology , monoclonal antibody , lymph , lymph node stromal cell , microbiology and biotechnology , antibody , antigen , immune system , pathology , medicine
Abstract In this study we have investigated the expression of major histocompatibility complex (MHC) class II molecules on T cells from various lymphoid compartments in the sheep. Monoclonal antibodies which react specifically with sheep MHC class II molecules homologous to the human DQ and DR molecules have been characterized. These antibodies have been used, together with the monoclonal antibodies specific for sheep CD4‐, CD8‐ and T19‐positiveT cells, to quantitate DQ and DR expression on T cell subsets in adult and fetal peripheral blood, afferent lymph, lymph node and efferent lymph. The results show that expression of class II by T cells depends on the age of the animal and the physiological location of the T cell. In fetal blood there is no expression of class II on CD8 + or T19 + cells and very low expression on CD4 + T cells. In adult peripheral blood and efferent lymph a significant proportion of cells express DR but not DQ. A very different situation is found in afferent lymph and the peripheral lymph node: in afferent lymph the majority of T cells in all three subsets express both DQ and DR molecules; in the lymph node over 50% of T cells express DR and 30 % are DQ + . These results suggest that within all T cell subsets there is a progression from DQ − DR − to DQ − DR + and DQ + DR + which correlates with physiological stages of T cell differentiation in vivo .