Multipotent mesenchymal stromal cells (MMSCs) are used for cell therapy of lesions of various genesis. The most widely used MMSCs are from two tissue sources: bone marrow and adipose tissue.The purpose of the work was to conduct a comparative assessment of the biological properties of murine bone marrow-derived and adipose tissue-derived MMSCs.Methods. The culture of MMSCs was obtained from the bone marrow and adipose tissue of 6 months-old male FVB/N mice according to standard protocols. We performed phenotyping, directed osteogenic and adipogenic differentiation, analysis of immunomodulatory properties in vitro of obtained cell cultures.Results. The cultured MMSCs from bone marrow and adipose tissue express the typical stromal markers (CD44, CD73, CD90 and Sca-1). A distinctive feature of bone marrow cells cultures of the 2nd passage was the high level of the hematopoietic markers CD45 and CD117 expression. MMSCs from both tissue sources are capable of differentiation in the osteogenic and adipogenic directions. At the same time, there were differences in the differentiation in the osteogenic direction – adipose tissue-derived MMSCs had a lower osteogenic potential. MMSCs exhibit inhibitory effect on mitogen-induced proliferation of splenocytes in vitro, expression of which does not depend on tissue origin of the MMSCs with significant inhibition of mitogen-induced proliferation of splenocytes at addition of high doses of MMSCs.Conclusions. MMSCs of bone marrow and adipose tissue express a similar level of surface markers that are characteristic of cells with multipotent properties. They are capable to differentiating in osteo- and adipogenic direction with differences in the degree of mineralization of the extracellular matrix and exhibit immunomodulatory effects in vitro, regardless of tissue origin.
Certain biological properties of multipotent mesenchymal stromal cells from bone marrow and adipose tissue of FVB/N mice