NK cells play a key role in the control of CMV infection in mice, but the mechanism by which NK cells can recognize and kill CMV-infected cells is unclear. In this study, the modulation of NK cell susceptibility of human CMV (hCMV)-infected cells was examined. We used a human lung and a human foreskin fibroblast cell line infected with clinical isolates (4636, 13B, or 109B) or with laboratory s...

BACKGROUND Human embryonic stem (hES) cell lines were first cultured using fetal mouse fibroblasts as feeder cells. To avoid feeders and to reduce the amount of xeno-components, Matrigel- and laminin-coated dishes, and conditioned mouse feeder cell medium have been used, and hES cells have also been cultured on human fetal muscle and skin, and adult Fallopian tube epithelial cells. METHODS We...

background: in this study, the effects of three structural analogues of adenosine upon proliferation of human tumor cells were investigated. previous research showed a cytotoxic effect of adenosine via a3 receptor and a1 receptor and sometimes this effect was receptor independent. the researches showed a differential cytotoxic effect of adenosine and its a3 agonists on cancerous cells, while ot...

Recent studies have shown that the calcium channel blockers, when combined with standard anticancer drugs, help overcome resistance that often develops to those drugs. Little is known about the effects of the calcium channel blockers themselves on tumor cells. We have studied the effects of one calcium channel blocker, verapamil, on human tumor cell lines in vitro. Our results show a reversible...

Recent studies have shown that the calcium channel blockers, when combined with standard anticancer drugs, help overcome resistance that often develops to those drugs. Little is known about the effects of the calcium channel blockers themselves on tumor cells. We have studied the effects of one calcium channel blocker, vcrapamil, on human tumor cell lines in vitro. Our results show a reversible...

There is a great interest in using epithelium generated in vitro for tissue bioengineering. Mouse 3T3 fibroblasts have been used as a feeder layer to cultivate human epithelia including corneal epithelial cells for more than 3 decades. To avoid the use of xeno-components, we evaluated human fibroblasts as an alternative feeder supporting human corneal epithelial regeneration. Five human fibrobl...

Background: Fibroblasts are mesenchymal cells that can be readily cultured in the laboratory and play a significant role in epithelialmesenchymal interactions, secreting various growth factors and cytokines that have a direct effect on epidermal proliferation, differentiation and formation of extracellular matrix. They have been incorporated into various tissue-engineered and used for a variety...

dendritic cells (dcs) induce pathogen-specific t cell responses. we comprehensively studied the effects of addition of maturation stimulus, fibroblasts (fibroblast conditioned medium), pha activated t cells (t cell conditioned medium), and mixture of fibroblast & pha activated t cells (fcm-tccm) conditioned media on maturation of dcs. monocytes were cultured with gm-csf and il-4 for five da...