CD4+ T cells have been shown to be crucial in the development of experimental autoimmune myasthenia gravis (EAMG). The role of CD8+ T cells in EAMG is less well established. We previously showed that antibody depletion of CD8+ T cells in rats effectively suppresses EAMG. To further study the role and relationship of CD4+ versus CD8+ T cells in induction of EAMG, CD4-/-, CD8-/-, and CD4-8- mutan...

We previously demonstrated that cultures of rat uveitogenic T cells rapidly become dominated by CD4+ cells, but activation of CD8+ autoreactive T cells also occurred during the in vitro culture of in vivo-primed T cells. In the present study, we show that the commonly used uveitogenic peptide, interphotoreceptor retinoid-binding protein (IRBP) 1-20, generated both CD4+ and CD8+ autoreactive T c...

Background: PPreviously, it was shown that exhausted CD4+ and CD8+ T cells in chronic lymphocytic leukemia (CLL) co-express the two immune-inhibitory receptors, Tim-3 and PD-1. Present study investigated the expression of Blimp-1, a transcription factor involved in T cell exhaustion, in patients with CLL. Materials and Methods: Peripheral blood mononuclear cells were collected from 25 untreate...

background and objectives : haemorrhagic septicaemia (hs), caused by pasteurella multocida, is the most important bacterial disease of cattle and buffaloes in india. oil adjuvant vaccine (oav) is the most potent vaccine available for the control of hs. the study aims to evaluate the effect of alum co-adjuvantation of oav on emulsion stability and immune response. materials and methods : two dif...

To elucidate the role of CD4+CD25+ regulatory T cells in oral tolerance, we used the model of contact hypersensitivity (CHS) to 2,4-dinitrofluorobenzene (DNFB), which is mediated by CD8+ Tc1 effector cells independently of CD4+ T-cell help. Conversely to normal mice, invariant chain knock-out (KO) (Ii degrees / degrees ) mice, which are deficient in CD4+ T cells, cannot be orally tolerized and ...

Accumulating evidence suggests that CD4 help is needed at the memory stage to mount effective secondary CD8 T cell responses. In this paper, we report that memory CD4 T cells can provide efficient help to memory CD8 T cells after interaction of the two lymphocytes with distinct dendritic cells. Provision of help to CD8 T cells required direct cell-cell contact and involved both IL-2 and CD40 li...

OBJECTIVE To determine the role of CD4+ and CD8+ T lymphocytes in the pathogenesis of alopecia areata. DESIGN Relapse of alopecia areata was induced in autologous human scalp grafts on Prkdc(scid) mice by injection of activated T lymphocytes derived from lesional skin. CD4+ and CD8+ T cells were separated by magnetic beads before injection. SETTING University-based dermatology practice. P...

Differential expression o f the CD4 and CD8 antigens on T lymphocytes has been used as a basis to construct models of thymic differentiat ion, and to identify functionally distinct subsets o f T cells (1, 2). In the thymus, most cells coexpress both CD4 and CD8, while minor subpopulations express the phenotypes CD4,8; CD4+,8-; and CD4,8 + (1, 2). It has been proposed that dur ing thymic on toge...

Immunization of BALB/c mice with a plasmid containing the gene for Trypanosoma cruzi trans-sialidase (TS) induced antibodies that inhibited TS enzymatic activity, CD4+ Th1 and CD8+ Tc1 cells, and protective immunity against infection. We used this model to obtain basic information on the requirement of CD4 or CD8 or B-cell epitopes for an effective DNA-induced immunity against T. cruzi infectio...