background: sustainable and commercial production of secondary metabolites is a critical issue when dealing with its clinical application. efforts are still being made to look for biotic or abiotic elicitors with more efficient and universal effects on the improvement of secondary metabolites. objective: in order to evaluate the suitability of different biotic elicitors on p. harmala l. cell su...

There are some reports on the lignan constituents of Linum spp. In this study, we investigated the cyototoxicity of Linum spp. in vitro cultures for the first time. If they show significant cytotoxic activity, they will be valuable candidates for isolation of cytotoxic compounds in large scale from them by tissue culture technology. In our study, we chose normal root, hairy root and calli cultu...

There are some reports on the lignan constituents of Linum spp. In this study, we investigated the cyototoxicity of Linum spp. in vitro cultures for the first time. If they show significant cytotoxic activity, they will be valuable candidates for isolation of cytotoxic compounds in large scale from them by tissue culture technology. In our study, we chose normal root, hairy root and calli cultu...

Background: Sustainable and commercial production of secondary metabolites is a critical issue when dealing with its clinical application. Efforts are still being made to look for biotic or abiotic elicitors with more efficient and universal effects on the improvement of secondary metabolites. Objective: In order to evaluate the suitability of different biotic elicitors on P. harmala L. cell...

transforming growth factor beta (tgf-b) is a mediator released by nearly all cell types. it has suppression activity on the immune system, but exactly how this effect is carried out is not clear. previous experiments showed that igg interacts with or carriers active tgf-b, that could suppresses cytotoxic t-cell responses to an immunogenic tumor in mice. since t cell receptor (tcr) has structura...

The effect of natural killer (NK) cells and lymphokine activated killer ( LAK) cells was studied on a group of human melanoma cell lines. Peripheral blood from healthy volunteers was utilized as a fresh source of natural killer cells and rhI L-2 for producing LAK cells. The cytotoxicity of effector cells was quantified using a 4 hour SI determining the density of antigen expression on tumor...