Antimetastatic and immunomodulating activity of Phytomix-40, a new plant preparation containing various adaptogens has been evaluated on the model of Lewis lung carcinoma. Intragastric administration of the drug decreased the intensity of metastatic process by 57% in comparison with the control and improved survival by 43%. This correlated with immunomodulating effect of the drug, which manifested by increased functional activity of T lymphocytes.
Key Words: plant adaptogens; Lewis lung carcinoma; antimetastatic activity; T lymphocytes; immunomodulating activityPhytomix-40 (PM-40), a plant preparation, has been developed as a preventive agent for cancer patients. It consists of 40 ingredients: adaptogens (ginseng root and rhisome, Rodiola rosea, thorny eleutherococcus. etc.), plants with antiinflammatory, cardiosedative, diuretic, and cholagogue properties, and raw polyvitamins. Experiments on mice and rats of both sexes demonstrated low toxicity of PM-40:LDs0>I5 ml/kg for mice and >20 ml/kg for rats.We investigated antimetastatic and immunomodulating effects of a new phytomixture on mice with transplanted Lewis lung carcinoma (LLC).
Introduction. PRAME protein is a promising target for cancer immunotherapy. PRAME is not expressed in normal tissues, but active in number of the tumor types. We have developed the mouse monoclonal antibodies 5D3F2 and 6H8F12 against PRAME epitopes. Aim. To determine the effects provided by the monoclonal antibodies 5D3F2 and 6H8F12 against the cells with different levels of PRAME gene expression. Materials and methods. We used different cell lines: NOMO-1 and WI-38 with low levels of expression PRAME; THP-1 with intermediate level of PRAME expression; K562 and WI-38-PRAME with high level of PRAME expression. We incubated these cell lines in the presence of monoclonal antibodies 5D3F2 and 6H8F12. The final concentration of monoclonal antibodies in culture varied from 6 pg/ml to 120 mcg/ml. The live cells were counted at the 24, 48 and 72 hours after incubation. The number of dead cells was evaluated by the MTT-test after 24 hours. Results. Cell growth rate is significanely decreased during incubation with monoclonal antibodies. This effect is correlated with increase of monoclonal antibody concentrations (Pearson coefficient 0,67;p = 0,0219). K562 growth rate was much less compared to the THP-1’s rate (p = 0,0061), NOMO-1 (p = 0,0005) and WI-38 (p = 0,0002) in the presence of the same amount of monoclonal antibody 6H8F12. K562 cell growth rate was lower than the WI-38-PRAME’s rate (p = 0,0027), despite the comparable level of PRAME expression. Effects of monoclonal antibody 5D3F2 and 6H8F12 were similar (p = 0,3946). According to the MTT-test, the comparable number of death cells in K562 and WI-38-PRAME was observed (p = 0,8405). Under the same conditions the amount of death cells in THP-1 was smaller than K562 (p = 0,6335). To compare with K562, fewer cells died in NOMO-1 and WI-38 (p = 0,0026 and p = 0,0005, respectively). Conclusion. It was shown that monoclonal antibody 5D3F2 and 6H8F12 exhibit a significant cytotoxic effect against PRAME-express-ing cells. In case of higher levels of PRAME expression the cytotoxic effect was stronger.
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