objective: the aim of the present study was to investigate the effect of protein and dna components of toxoplasma gondii on maturation of dendritic cells and their efficiency in il-12 production and proliferation of t cells. materials and methods: for dc generation, bone marrow cells were cultured in the presence of gm-csf and il-4 for 5 days. tumor lysate and protein or dna components of toxo...

background: rna interference-based gene silencing has recently been applied as an efficient tool for functional gene analysis. rorc2 is the key transcription factor orchestrating th17 cells differentiation, the cells that are known as the pathogenic elements in various autoimmune diseases. the aim of this study was to design efficient sirnas specific for rorc2 and to evaluate different criteria...

objective: nanosilver has numerous applications in medicine due to its potent antibacterial activity. however, data regarding the bio-safety of its effective concentrations is scarce. this study aims to assess the toxicity of silver nanoparticles on human gingival epithelial cells under in-vitro conditions.   methods: this in vitro study evaluated the toxic effects of filtered and unfiltered na...

twik2 ion channels (k2p6.1, encoded by a gene named kcnk6) belong to the family of two-pore domain potassium channels. twik2 is also considered as a “silent” channel because of its inability to produce measurable currents in heterologous expression systems and its intracellular retention. it is expressed in different mammalian tissues including lymphoid organs and the vascular system. however, ...

background: niche cells, regulating spermatogonial stem cells (sscs) fate are believed to have a reciprocal communication with sscs. the present study was conducted to evaluate the effect of ssc elimination on the gene expression of glial cell line-derived neurotrophic factor (gdnf), fibroblast growth factor 2 (fgf2) and kit ligand (kitlg), which are the main growth factors regulating sscs deve...

introduction: to evaluate the camp -mediated ibmx (3-isobutyle -1-methyl xanthin) and db-camp (dibutyryl camp) effects on differentiation of human embryonic stem cells (hescs) into nerve cells were the objectives of this study. methods: we have used royan h1 hesc- derived embryoid bodies with four treatment groups: six days treatment with ibmx (5×10 -4m) and db-camp (10 -9m) (referred to as cam...

background: the aim of this study was to investigate the percentage of the stem cells population in human endometrial tissue sections and cultured cells at fourth passage. methods: human endometrial specimens were divided into two parts, one part for morphological studies and the other part for in vitro culture. full thickness of human normal endometrial sections and cultured endometrial cells ...

background homocysteine is a sulfur-containing amino acid which formed (mainly in the liver) during the metabolism of methionine. prior studies indicated the important role of hyperhomocysteinemia in pathogenesis and progression of alcoholic liver disease, liver steatosis and cirrhosis. one of the most important mechanisms by which homocysteine promote the development of hepatic injury is oxida...

objectives : stem cell (sc) therapy is a promising technique for tissue regeneration. this study aimed to compare the viability and proliferation ability of periodontal ligament stem cells (pdlscs) isolated from the periodontium of healthy and periodontitis-affected teeth to obtain an autologous, easily accessible source of scs for tissue regeneration in periodontitis patients. materials and me...

naturally the brain is ineffective in regenerating functional tissue after disease or injury, so to overcome these defects innovative curative strategies such as stem cell transplantation and tissue engineering have to be considered. researchers investigate the use of strategies to attain better functional repair results. one of the important challenges of effective transplantation is the deliv...