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Adult stem cells are of particular importance for applications in regenerative medicine. Umbilical cord was established recently as an alternative source of mesenchymal stem cell (MSC) instead of bone marrow (BM) and is superior to BM and other adult tissues according to several MSC properties. Additionally, for the purpose of cell therapy in clinical scale, steps of cell isolation, expansion and culture required to be precisely adjusted in order to obtain the most cost-effective, least time-consuming, and least labor-intensive method. Therefore, in this study, we are going to compare two simple and cost-effective explant culture methods for isolation of MSCs from human umbilical cord. One of the methods isolates cells from entire cord and the other from Wharton's jelly matrix. Isolated cells then cultured in simple medium without addition of any growth factor. MSCs obtained via both methods display proper and similar characteristics according to morphology, population doubling time, post-thaw survival, surface antigenicity and differentiation into adipocytes, osteocytes, and chondrocytes. MSCs can easily be obtained from the entire cord and Wharton's jelly, and it seems that both tissues are appropriate sources of stem cells for potential use in regenerative medicine. However, from technical large-scale preview, MSC isolation from entire cord piece is less labor-intensive and time-consuming than from Wharton's jelly part of the cord.

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