Abstract
Mesenchymal stem cells from the adipose tissue (AT MSC) and the bone marrow (BM MSC) stimulated migration of melanoma B16 cells, while mammary adenocarcinoma Ca755 cells stimulated migration of mesenchymal stem cells. Mesenchymal stem cells retained these properties at late terms after γ-irradiation in vitro. Tumors that developed after injection of Ca755 cells alone and in combinations with BM MSC or AT MSC had similar histological structure corresponding to breast adenocarcinoma. Only AT MSC stimulated tumor growth, which was determined by more intensive secretion of factors stimulating proliferation of tumor cells, including chemokine CCL2. The use of AT MSC in regenerative medicine requires careful monitoring of the absence of tumors in patients.
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