INHIBITION BY ANTI-CD2 MONOCLONAL-ANTIBODIES OF ANTI-CD3-INDUCED T-CELL-DEPENDENT B-CELL ACTIVATION

被引:5
|
作者
STOHL, W
CROW, MK
机构
[1] HOSP SPECIAL SURG,DEPT MED,NEW YORK,NY 10021
[2] CORNELL UNIV,MED CTR,NEW YORK HOSP,COLL MED,NEW YORK,NY 10021
关键词
D O I
10.1016/0008-8749(90)90269-W
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Anti-CD3 mAb can activate T cells to help in B cell activation as detected by late events, such as maturation of B cells into Ig-secreting cells (IgSC), or by early events, such as B cell surface expression of the activation marker CD23. Two different anti-CD2 mAb each inhibited anti-CD3-induced T cell-dependent B cell activation in a dose-dependent fashion. Neither irradiation of the T cells prior to culture nor depletion of CD8+ cells abrogated the inhibitory effects of anti-CD2 mAb. Despite the ability of these anti-CD2 mAb to inhibit anti-CD3-induced IL2 production, addition of exogenous IL2 to anti-CD2 mAb-containing cultures could not fully reverse the inhibitory effects on IgSC generation. Furthermore, addition of various combinations of IL1, IL2, IL4, and IL6 or crude PBMC or monocyte culture supernatants also could not reverse anti-CD2-driven inhibition. In T cell-depleted cultures, anti-CD2 mAb had no effect on the ability of IL4 to induce B cell CD23 expression, confirming that anti-CD2 mAb had no direct effect on B cells. However, in cultures containing T + non-T cells, anti-CD2 mAb did partially inhibit IL4-induced B cell CD23 expression. Taken together, these observations demonstrate that certain CD2 ligands can modulate T cell-dependent B cell activation by a mechanism which, at least in part, involves a direct effect by the CD2 ligand on the T cell itself. © 1990.
引用
收藏
页码:257 / 270
页数:14
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