We previously demonstrated that stimulation of bovine peripheral blood mononuclear cells (PBMCs) with staphylococcal enterotoxin C (SEC), led to an inversion of the CD4(+):CD8(+)T cell ratio and generation of an atypical CD8(+)T cell subpopulation expressing CD26. In the present study, we examined T cell apoptosis and proliferation profiles of PBMC subpopulations in cultures stimulated with SEC...

BACKGROUND This study was conducted to examine, in vitro , the effect of soluble egg antigen (SEA) of S. haematobium on intracellular HCV RNA load in peripheral mononuclear cells (PBMC) as well as on cell proliferation in patients with chronic HCV infection. METHODS PBMC from 26 patients with chronic HCV infection were cultured for 72 hours in presence and absence of 50 mug SEA/ml medium. Int...

BACKGROUND Activity-dependent neuroprotector (ADNP) is a neuroprotective molecule containing an 8-amino acid peptide, NAPVSIPQ (NAP), that is sufficient for its neuroprotective effects. OBJECTIVE To assess the expression of ADNP in the human immune system in normal subjects and multiple sclerosis patients. MaterialsandMethods: ADNP expression was assessed in peripheral blood mononuclear cells...

Factors that influence viability and function of cryopreserved peripheral blood mononuclear cells (PBMC) were identified on 54 samples from 27 AIDS Clinical Trial Units. PBMC viability ranged from 1 to 96% with a median of 70%, was higher in laboratories with experienced staff, and was not significantly associated with CD4 cell number. Function of cryopreserved PBMC, measured by lymphocyte prol...

In the search of the antigenic determinants of a 65-kDa mannoprotein (MP65) of Candida albicans, tryptic fragments of immunoaffinity-purified MP65 preparations were tested for their ability to induce lymphoproliferation of human peripheral blood mononuclear cells (PBMC). Five major peptides (T1 to T5) were shown to induce a vigorous proliferation of PBMC from the majority of the eight healthy h...

Toxoplasma gondii is an obligatory intracellular parasite whose life cycle may include man as an intermediate host. More than 500 million people are infected with this parasite worldwide. It has been previously reported that T. gondii contains a superantigen activity. The purpose of the present study was to determine if the putative superantigen activity of T. gondii would manifest towards huma...

OBJECTIVES To analyse the expression of receptor activator of NF-kappaB (RANK) and RANK ligand (RANKL) in the joints of children with juvenile idiopathic arthritis (JIA), to characterize the phenotype of RANK(+) cells and to test the hypothesis that some RANK(+) cells are of the dendritic type. METHODS Paired samples of peripheral blood mononuclear cells (PBMC) and synovial fluid mononuclear ...

Cytomegalovirus (CMV) infection is associated with immune-suppression in immune-compromised hosts and old adults. We previously showed that ex vivo CMV restimulation of peripheral blood mononuclear cells (PBMC) of CMV-seropositive volunteers expanded CD4+CD27-CD28- regulatory T cells (Tregs). Here we evaluate the phenotype and function of circulating CD4+CD27-CD28- T cells of CMV-seropositive a...