DIFFERENTIAL THYMUS DEPENDENCE OF RAT CD8 ISOFORM EXPRESSION

被引:126
作者
TORRESNAGEL, N
KRAUS, E
BROWN, MH
TIEFENTHALER, G
MITNACHT, R
WILLIAMS, AF
HUNIG, T
机构
[1] UNIV WURZBURG,INST VIROL & IMMUNOBIOL,VERSBACHER STR 7,W-8700 WURZBURG,GERMANY
[2] UNIV OXFORD SIR WILLIAM DUNN SCH PATHOL,MRC,CELLULAR IMMUNOL UNIT,OXFORD OX1 3RE,ENGLAND
关键词
D O I
10.1002/eji.1830221113
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Expression of the rat CD8 molecule was studied using five novel monoclonal antibodies (mAb), four of which are specific for the V-like domain of CD8alpha. whereas one reacts either with the beta chain or with a determinant only expressed on the CD8 alpha/beta heterodimer. mAb to both chains effectively blocked purified lymph node CD8 T cells in mixed lymphocyte reaction and in cell-mediated cytotoxicity. Flow cytometric analysis showed that CD8 T cells from lymph nodes or spleen of normal rats almost exclusively express the alpha/beta isoform, regardless of the T cell receptor isotype (alpha/beta or gamma/delta). In contrast, natural killer (NK) cells carry only CD8alpha chains. This CD8alpha+beta- phenotype was also prominent among CD8 T cells from athymic rats and from intestinal epithelium of normal rats. CD8alpha homodimers can also be expressed as a result of activation, as shown by analysis of CD4 CD8 double-positive T cells obtained from highly purified lymph node CD4 T cells by in vitrok stimulation, Such CD4+CD8alpha+beta- cells also represent a major subset among adult intestinal intraepithelial lymphocytes (IEL), suggesting local activation. Taken together, the difference in CD8 isoform expression among T cells from athymic rats, NK cells, and gut IEL versus CD8 T cells from peripheral lymphatic organs of euthymic animals suggests that like in mice, expression of the CD8 heterodimer is more dependent on intrathymic maturation than that of the homodimer. Since the more stringent thymus dependence of CD8alpha+beta+ T cells may be due to a requirement for thymic selection on self major histocompatibility complex class I antigens, the virtually exclusive CD8alpha+beta+ phenotype of peripheral rat gamma/delta T cells could mean that antigen recognition by this subset is also restricted by MHC class I molecules.
引用
收藏
页码:2841 / 2848
页数:8
相关论文
共 49 条
[1]  
BEVAN DJ, 1986, IMMUNOLOGY, V59, P621
[2]   CHARACTERIZATION OF MURINE THYMOCYTES WITH CD3-ASSOCIATED T-CELL RECEPTOR STRUCTURES [J].
BLUESTONE, JA ;
PARDOLL, D ;
SHARROW, SO ;
FOWLKES, BJ .
NATURE, 1987, 326 (6108) :82-84
[3]   INTESTINAL INTRAEPITHELIAL LYMPHOCYTES ARE A DISTINCT SET OF GAMMA-DELTA-T-CELLS [J].
BONNEVILLE, M ;
JANEWAY, CA ;
ITO, K ;
HASER, W ;
ISHIDA, I ;
NAKANISHI, N ;
TONEGAWA, S .
NATURE, 1988, 336 (6198) :479-481
[4]   FUNCTIONAL SUBCLASSES OF T LYMPHOCYTES BEARING DIFFERENT LY ANTIGENS .1. GENERATION OF FUNCTIONALLY DISTINCT T-CELL SUBCLASSES IS A DIFFERENTIATIVE PROCESS INDEPENDENT OF ANTIGEN [J].
CANTOR, H ;
BOYSE, EA .
JOURNAL OF EXPERIMENTAL MEDICINE, 1975, 141 (06) :1376-1389
[5]  
CANTRELL DA, 1982, IMMUNOLOGY, V45, P97
[6]  
CEREDIG R, 1989, J IMMUNOL, V142, P3353
[7]  
CERFBENSUSSAN N, 1984, J IMMUNOL, V132, P2244
[8]   MONOCLONAL-ANTIBODY TO A TRIGGERING STRUCTURE EXPRESSED ON RAT NATURAL-KILLER CELLS AND ADHERENT LYMPHOKINE-ACTIVATED KILLER CELLS [J].
CHAMBERS, WH ;
VUJANOVIC, NL ;
DELEO, AB ;
OLSZOWY, MW ;
HERBERMAN, RB ;
HISERODT, JC .
JOURNAL OF EXPERIMENTAL MEDICINE, 1989, 169 (04) :1373-1389
[9]   THE HINGE REGION OF THE CD8-ALPHA CHAIN - STRUCTURE, ANTIGENICITY, AND UTILITY IN EXPRESSION OF IMMUNOGLOBULIN SUPERFAMILY DOMAINS [J].
CLASSON, BJ ;
BROWN, MH ;
GARNETT, D ;
SOMOZA, C ;
BARCLAY, AN ;
WILLIS, AC ;
WILLIAMS, AF .
INTERNATIONAL IMMUNOLOGY, 1992, 4 (02) :215-225
[10]  
CRON RQ, 1989, J IMMUNOL, V142, P3754