Background: Adipose derived stem cells (ASCs) provoke the accumulation and expansion of regulatory T cells, leading to the modulation of immune responses in tumor microenvironment. Objective: To assess the effect of tumoral ASCs on the trend of regulatory T cells differentiation. Methods: Peripheral blood naïve CD4+ T cells were co-cultured with ASCs derived from breast cancer or normal breast ...

Fermentations of Penicillium glabrum (Wehmer) Westling produce a complex mixture of metabolites with potent CD4-binding activity in an ELISA based on the binding of the monoclonal antibody antiLeu 3a to soluble recombinant CD4. On purification this mixture was found to include the known polyketide metabolites citromycetin and anhydrofulvic acid and a series of novel xanthone derivatives with CD...

background: given to the abundant incidence of malnutrition in hiv+ patients and its effect on progress of aids disease, several studies have recommended supplementation therapy (such as selenium, levamisole, zinc). methods: this clinical trial was prefunded on patient's with hiv + in behavior diseases consulting center, kermanshah, iran 2006-2007. one hundred-seventy eight out of all pati...

background and objective: candidiasis is a common opportunistic infection in hiv-infected patients. the spectrum of candida infection is diverse, starting from asymptomatic colonization to pathogenicforms. the low absolute cd4+ t-lymphocyte count has traditionally been cited as the greatest risk factor for the development of oropharyngeal candidiasis and current guidelines suggest increased ris...

tuberculosis is an important opportunistic disease among hiv- infected persons worldwide; from march 1999 to feburery 2001 we had seventeen patients with hiv-infection and tuberculosis. here we are presenting the clinical manifestations, diagnosis, treatment and outcome of them. all of them were male, 11 patients had pulmonary and 5 patients had extrapulmonary (pleural effusion 1, hepatic granu...

The bone and immune systems are closely related through cellular and molecular interactions. Because bone-resorbing osteoclasts (OCs) are derived from the monocyte/macrophage lineage, similar to dendritic cells (DCs), we hypothesized that OCs could serve as antigen-presenting cells (APCs) to activate T cells. In this study, OCs were generated from human monocytes with stimulation by receptor ac...

OBJECTIVE To investigate the intracellular and soluble cytokine levels and T cell subsets in peripheral blood of patients with active and inactive polymyositis and dermatomyositis. METHODS The frequencies of T and B lymphocytes, T helper (Th), and T cytotoxic (Tc) cells and of interferon gamma (IFNgamma), interleukin (IL)4, and IL10 expression of CD4+ or CD8+ cells were determined by flow cyt...

Chronic engagement of the B cell receptor by soluble autoantigen leads to reduced B cell survival. Using the Ig and hen egg lysozyme double transgenic mouse model, we demonstrate that the survival of soluble autoantigen-engaged B cells is further reduced in mice lacking CD4 T cells or deficient in CD40. Mixed bone marrow chimera experiments reveal that, under homeostatic conditions, the CD40L-C...

Numerous abnormalities of the peripheral blood T cell compartment have been reported in human chronic Trypanosoma cruzi infection and related to prolonged antigenic stimulation by persisting parasites. Herein, we measured circulating lymphocytes of various phenotypes based on the differential expression of CD19, CD4, CD27, CD10, IgD, IgM, IgG and CD138 in a total of 48 T. cruzi-infected individ...

Mesenchymal stem cells (MSCs) can modulate lymphocyte proliferation and function. One of the immunomodulatory functions of MSCs involves CD4+CD25+FoxP3+ regulatory T cells (Tregs), which negatively regulate inflammatory responses. MSC-mediated Treg induction is supposed to be regulated by mechanisms requiring both soluble and cell contact-dependent factors. Although the involvement of soluble f...