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Open Access Donor-Matched Functional and Molecular Characterization of Canine Mesenchymal Stem Cells Derived From Different Origins

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Canine mesenchymal stem cells (cMSCs) have generated a great interest as a promising source for cell-based therapies. To understand the basic biological properties of cMSCs derived from bone marrow (cBM-MSCs), adipose tissue (cA-MSCs), and dermal skin (cDS-MSCs) from a single donor, the present study compared their alkaline phosphatase (AP) activity, expression of CD markers and stem cell transcription factors, differentiation ability into osteogenic, adipogenic, and chondrogenic lineages, in vivo ectopic bone formation, chromosomal stability, cell cycle status, telomere length, and telomerase activity. Expressions of AP activity and transcription factors (Oct3/4, Nanog, and Sox2) were either absent or extremely weak in all cMSCs. CD marker profile (CD45, CD90+, and CD105+) and differentiation capacity were exhibited by all cMSCs, although cA-MSCs had enhanced cytochemical staining associated with expression of lineage-specific markers. In vivo bone formation of cMSCs was performed with demineralized bone matrix (DBM) by transplanting into the subcutaneous spaces of 9-week-old BALB/c-nu mice, followed by radiographic and histological analysis after 1 and 2 months. cA-MSCs and cDS-MSCs, in contrast to the in vitro observations, also displayed higher in vivo osteogenic abilities than cBM-MSCs. Ploidy analysis showed that cells were diploid and contained no noticeable chromosomal abnormalities. Furthermore, a relatively low percentage of cells was found at the G1 phase in all cMSCs, especially in DS-MSCs. Regardless of the different tissue sources, cMSCs from a single donor showed no differences in telomere lengths (∼18‐19 kbp) but exhibited varied telomerase activity. The above results suggest that tissue-specific cMSCs derived from a single donor possess slight differences in stem cell properties.
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  • Cell Transplantation publishes original, peer-reviewed research and review articles on the subject of cell transplantation and its application to human diseases. To ensure high-quality contributions from all areas of transplantation, separate section editors and editorial boards have been established. Articles deal with a wide range of topics including physiological, medical, preclinical, tissue engineering, and device-oriented aspects of transplantation of nervous system, endocrine, growth factor-secreting, bone marrow, epithelial, endothelial, and genetically engineered cells, among others. Basic clinical studies and immunological research papers are also featured. To provide complete coverage of this revolutionary field, Cell Transplantation will report on relevant technological advances, and ethical and regulatory considerations of cell transplants. Cell Transplantation is now an Open Access journal starting with volume 18 in 2009, and therefore there will be an inexpensive publication charge, which is dependent on the number of pages, in addition to the charge for color figures. This will allow work to be disseminated to a wider audience and also entitle the corresponding author to a free PDF, as well as prepublication of an unedited version of the manuscript.
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