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...

an appropriate differentiation of distinct human cd4+ t cell subset is critical for manipulating these cells for using in immunity related diseases. despite various attempts to clarify the role of different factors involved in th17 differentiation, many crucial contradictions yet remained to be optimized. although it has been shown that the differentiation of in-vitro th17 cells culture conditi...

objective(s): regulatory t cells, including cd4+cd25+fox3+ and cd8+cd28- cells play an important role in regulating the balance between immunity and tolerance. since multiple sclerosis is an inflammatory autoimmune disease, regulatory t cells are considered to be involved in its pathogenesis. in this study, we investigated the circulatory numbers of the two mentioned types of regulatory t cells...

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 ...

all-trans retinoic acid (atra), as an active metabolite of vitamin a, has been shown to affect immune cells. this study was performed to evaluate the effect of atra on viability, proliferation, activation and lineage-specific transcription factors of cd4+ t cells. cd4+ t cells were  separated  from  heparinized  blood  of  healthy  donors  and  were  cultured  in conditions, some with, some wit...

Background: Drugs used in cancer treatment specifically kill T regulatory cells. Objective: To determine different phenotypes of T regulatory cells during the maintenance phase chemotherapy for pediatric acute lymphoblastic leukemia (ALL). Materials: We evaluated the percentages of regulatory T cells by flow cytometry. Soluble CTLA-4 (sCTLA-4) ...

the purpose of this study was to determine the role of streptococcal m protein in naturally-occurring cd4+cd25+ regulatory t cells (ntregs) function and development in rheumatic heart disease in iraqi patients. streptococcus pyogenes was isolated for subsequent m protein extraction. also, peripheral blood ntregs and cd4+ t cells were isolated by using magnetic cell separation system. tissue cul...

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 ...

mitochondrial functions have a major impact on t-cell functionality. in this study we characterized whether mitochondrial function in the neonatal t-cells differs from that in the adult t-cells during short t-cell activation. methods: we used fow cytometry methods to test mitochondrial mass and to monitor mitochondrial ca2+ levels, mitochondrial potential and superoxide generation in parallel w...