Abstract
The effects of multipotent mesenchymal stromal cell (MMSC) derivatives on breast cancer cells have been studied in vitro and in vivo. A cytostatic effect of substances produced by human bone marrow MMSCs on the tumor cell population and the inhibition of tumor cell migration into the suspension fraction in vitro were demonstrated. These phenomena were accompanied by upregulation of tumor-associated marker expression: cytokeratin and EpCAM expression was upregulated in 2D and 3D cell cultures and vimentin expression was upregulated in 3D cultures. A single injection of mouse bone marrow MMSC lysate into the experimental animals suppressed tumor growth in thigh muscles. Moreover, this treatment contributed to the preservation of muscle tissue integrity and the normalization of biochemical parameters of the blood in animals that received grafts of Ehrlich adenocarcinoma tumor cells.
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