Tumor immunity in patients with primary intracranial tumors was assessed in relation to the general status of host immunocompetence. Lymphocyte sensitization to tumor-specific membrane antigens was demonstrated by the proliferative response of lymphocytes in the presence of autochthonous tumor cells. Paradoxically, one-half of the patients could not be sensitized to a primary antigen, dinitroch...

We have studied functional alteration of immunocytes in mice following inoculation of Toxocara canis second stage larvae. Results indicated depression of lymphocyte blastogenesis in response to concanavalin-A, phytohemagglutinin and allogeneic non B-cells; however, B-cell polyclonal activation was not affected as indicated by the production of total IgG. In contrast, frequency of antibody ...

Background:Thyroid nodules are found in more than 50% of patients using ultrasonography. The incidence thyroid the population is increasing, between 5% and 15% malignant nodules. In today's era, to identify exact nature very necessary, because cancer most common endocrine malignancy that occurs inflammatory process plays a major role many events, including tumor development, growth, clinical pr...

CONTEXT Sepsis is characterized by the development of adaptive immune cell alterations, which intensity and duration are associated with increased risk of health-care associated infections and mortality. However, pathophysiological mechanisms leading to such lymphocyte dysfunctions are not completely understood, although both intrinsic lymphocyte alterations and antigen-presenting cells (APCs) ...

In vitro radiation survival of peripheral blood T lymphocytes was studied in 1 5 clinically normal adults and 4 patients with Fanconi’s anemia. Tritiated thymidine incorporation in a whole blood lymphocyte stimulation test (1ST) and a newly developed whole blood T-lymphocyte colony assay were used to measure lymphocyte blastogenesis and colony formation in response to phytohemagglutinin (PHA) o...

T lymphocyte activation is a pivotal step of the adaptive immune response. It requires the recognition by T-cell receptors (TCR) of peptides presented in the context of major histocompatibility complex molecules (pMHC) present at the surface of antigen-presenting cells (APCs). T lymphocyte activation also involves engagement of costimulatory receptors and adhesion molecules recognizing ligands ...

Transfer factor (TF) derived from donors with strong delayed hypersensitivity to coccidioidin (CDN) was administered to four patients with active disseminated or progressive pulmonary coccidioidomycosis. The clinical and immunologic response to TF was studied. Before the administration of TF, all four patients had defective thymus-derived lymphocyte (T-cell) function. In no case were lymphocyte...

background: various responses and different prognosis to specific treatment in different patients from one hand, and importance of ifn-γ producer cells on the other hand impressed us to study tc1. methods: the study was conducted in ghaem medical center and bu-ali research institute, mashhad university of medical sciences, iran from 2001 to 2002. lymphocytes of 36 patients were counted and cult...

The recent introduction of a reliable, T-lymphocyte proliferation assay, which utilizes thioglycollate-induced, nylon wool column-passed, peritoneal exudate lymphocytes from immune mice (PETLES), allowed us to investigate the genetic control of murine immune responses at the T-lymphocyte level. Examination of the blast cells generated in this population 5 days after stimulation with antigen, re...

Estimation of T-lymphocyte subsets continues to be an important aspect for monitoring HIV disease progression and response to antiretroviral therapy. Most of the diagnostic laboratories often rely on studies from western for CD4+T-lymphocyte reference values, which could, often be unreliable for usage in local settings. To establish the normal reference values of T lymphocyte subsets from healt...