Abstract
Stem cells (SCs) vary in morphological, immunophenotypic, proliferative, and differentiation characteristics depending on their tissue source. Comparative analysis of their biological properties is essential for making an optimal SC choice for regenerative therapy. Using immunocytochemistry, flow cytometry, histochemistry, and RT-PCR, we have investigated SCs obtained from human subepicardial (SEC-AT) and subcutaneous (SC-AT) adipose tissues and cultured under similar conditions without any differentiation-promoting factors. The cultures were similar in having a high proportion of proliferating cells positive for nuclear antigen (PCNA). In both cultures, immunophenotyping has revealed high expression of mesenchymal stem-cell surface markers CD29, CD44, CD73, and CD105; low expression of CD31, CD34, and CD45; and variability in CD117, CD146, and CD309 expression. The only difference in the CD marker profile was the significantly lower expression of CD90 in the culture of SCs from SC-AT than from SEC-AT. Histochemical analysis showed a lack of Oil Red O-positive cells in both cultures and an about ten times higher number of alkaline phosphatase-positive cells among SCs from SC-AT. In both cultures, immunocytochemistry detected low expression of the slow myosin heavy chain marker MAB1628 and smooth muscle actin marker α-hSMA. Expression of the gap junction protein connexin-43 was markedly higher in cells from SC-AT cultures. Only the cells of these cultures expressed the epithelial cell marker cytokeratin-19. GATA4 mRNA expression detected with RT-PCR was identified in SEC-AT rather than in SC-AT cells. Our results suggest that SC-AT is enriched compared to SEC-AT with epithelial cell and osteogenic progenitors. In turn, SEC-AT possesses cardiomyogenic SCs and can be considered an alternative source for cell cardiotherapy.
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Abbreviations
- AT:
-
adipose tissue
- SCs:
-
stem cells
- SEC-AT:
-
subepicardial adipose tissue
- SC-AT:
-
subcutaneous adipose tissue
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Original Russian Text © T.A. Krylova, O.A. Bystrova, A.A. Khudyakov, A.B. Malashicheva, O.M. Moiseeva, V.V. Zenin, M.G. Martynova, 2014, published in Tsitologiya, 2014, Vol. 56, No. 3, pp. 212–217.
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Krylova, T.A., Bystrova, O.A., Khudyakov, A.A. et al. Properties of stem cells isolated from subcutaneous and subepicardial adipose tissues. Cell Tiss. Biol. 8, 277–282 (2014). https://doi.org/10.1134/S1990519X1404004X
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DOI: https://doi.org/10.1134/S1990519X1404004X