Immunization of mice with peptide constructs, consisting of a determinant recognized by T cytotoxic cells colinearly linked to a determinant recognized by T helper cells (TDc-TDh) was able to induce cytotoxic T lymphocytes in vivo. Interestingly, this induction could be achieved in the absence of adjuvant in non-depleted as well as in CD4(+)-cell-depleted BALB/c mice. In the latter case, induct...

BACKGROUND Iron-deficiency anaemia (IDA) is a major worldwide public health problem. Children and women of reproductive age are especially vulnerable to IDA, and it has been reported that these patients are more prone to infection. This study was done to evaluate alteration of lymphocyte subgroups in IDA. METHODS In this prospective study, we investigated lymphocyte subsets in pre-menopausal ...

The perivascular mononuclear cell collections of the rheumatoid synovium were examined both at the light and electron microscopic level by an immunoperoxidase staining technique using monoclonal antibodies directed against T cell subsets. These accumulations were variable in composition and size, not only in specimens from different patients but in the same specimen. Some areas (lymphocyte-rich...

Neuraminidase treated T-lymphocytes from normals and CLL gave an enhanced response to PWM when compared to untreated T-lymphocytes. However the overall response of CLL T-lymphocytes was much lower as compared to normals. CLL T-lymphocytes showed an imbalance of T-subsets, where the Tu (Helper) were not only reduced 20.4± 2.96 but also diluted by increased ‘fy (Suppressor) 45 2+5 . 35, when comp...

12-O-tetradecanoylphorbol-13-acetate (TPA) selectively abrogates, in nanomolar concentrations, the expression of the T4 differentiation antigen, as defined by the monoclonal anti-T4 antibody (1) on Il-2-producing T helper lymphocytes from normal donors and on T helper lymphocytes from a patient with malignant T cell lymphoma (Sézary's syndrome); this compound does not affect the expression of c...

Major histocompatibility complex-restricted helper T cell clones against "minor" antigens expressed on B cell and macrophage surfaces, when confronted with appropriate T cell-depleted spleen cells, are induced to proliferation and, in turn, activate "target-responder" B cells to polyclonal growth and maturation. Irradiation of helper cell populations, however, demonstrates that their effector f...

The changes and the possible roles of splenic T lymphocyte subpopulations in high-responder Long-Evans (LE) rats and low-responder Sprague-Dawley (SD) rats with induced adjuvant arthritis (AA) were investigated. Total splenic T lymphocytes of both strains did not change significantly after the adjuvant injection. However, LE rats exhibited an increase in percentage of helper T cells and helper/...

Systemic lupus erythematosus (SLE) is an autoimmune disease characterised by increased B cell activity and depressed T cell function. However, the contribution of the immunoregulatory system to its pathogenesis is still unclear. The recent development in the production of monoclonal antibodies and the availability of bench-top flow cytometers have allowed rapid quantitation of peripheral blood ...

T lymphocytes differentiate in discrete stages within the thymus. Immature thymocytes lacking CD4 and CD8 coreceptors differentiate into double-positive cells (CD4(+)CD8(+)), which are selected to become either CD4(+)CD8(-)helper cells or CD4(-)CD8(+) cytotoxic cells. A stage-specific transcriptional silencer regulates expression of CD4 in both immature and CD4(-)CD8(+) thymocytes. We show here...

Intravesical bacillus Calmette-Guerin (BCG) administration has been used as an adjuvant therapy after transurethral resection for superficial bladder cancer, but the exact mechanisms of its antitumor activity are not yet known. The aim of this study was to characterize the immunologic aspects of antitumor activity of BCG using an animal model. C3H/He inbred mice and murine bladder tumor cell li...