RESUMO
In this study, using new approach (laser diffraction + biological dyes), we have demonstrated the decrease of cells viability in vitro in the deuterated growth medium, whereas in the deuterium-depleted medium, there was an increase of cell viability. We have also found that not all dyes are equally sensitive to the D/H ratios in the culture medium (system) as well as to the different cell types (cancer vs normal cells).
Assuntos
Sobrevivência Celular/efeitos dos fármacos , Corantes/química , Corantes/farmacologia , Meios de Cultura/análise , Meios de Cultura/química , Deutério/análise , Técnicas de Cultura de Células , Linhagem Celular , Linhagem Celular Tumoral , Células Cultivadas , Fenômenos Químicos , Humanos , Lasers , Estrutura Molecular , Tamanho da PartículaRESUMO
Tripeptides T-36 and, particularly, T-38 in concentrations of 0.1, 1, and 10 ng/ml inhibited proliferation of primary trypsinized embryonic mesenchymal stem cells, rat transplantable KF-1 fibroblasts, and human erythromyelosis K-562 cells. Inhibition of proliferation in embryonic and immortalized cells under the influence of tripeptides probably reflects antitumor activity of these substances. Tripeptides had no effect on lymphocyte survival and their adhesive, cytotoxic, and induced proliferative activities. T-36 did not modulate the proliferative properties of erythromyelosis K-562 cells. Tripeptides did not change engulfment activity and spontaneous and induced bactericidal activities of granulocytes. T-36 in a concentration of 0.1 ng/ml increased spontaneous proliferation of normal lymphocytes. These data suggest that tripeptides stimulate nontumor immune cells in adult people.
Assuntos
Linfócitos/citologia , Linfócitos/efeitos dos fármacos , Células-Tronco Mesenquimais/citologia , Células-Tronco Mesenquimais/efeitos dos fármacos , Peptídeos/farmacologia , Animais , Linhagem Celular , Proliferação de Células/efeitos dos fármacos , Humanos , RatosRESUMO
The growth factors, cytokines, adhesive molecules and extracellular matrix components play the leading role in the processes of intercellular interactions. Literary data on structure and mechanisms of functioning of the growth factors and their receptors are summarised in the present review. Some aspects of regulatory functions of such growth factors as EGF, TGFalpha, TGFbeta, FGF, KGF, AR, and HGF in these processes in epidermis keratinocytes both in vivo and in vitro as example were also considered.
