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Multilineage Potential of Side Population Cells From Human Amnion Mesenchymal Layer

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Side population (SP) cells were isolated by FACS from a human amnion mesenchymal cell (AMC) layer soon after enzyme treatment. The yield of SP cells from AMC layer (AMC-SP cells) was about 0.1‐0.2%. AMC-SP cells grew well with cell doublings of 40‐80 days of culture. FACS profiles and immunocytostaining showed that AMC-SP cells were composed of two different cells immunologically: HLA I/II and HLA I+/II. Oct-3/4 was detected in the nucleus of AMC-SP cells, when the culture was examined at the third, sixth, and 10th passages. RT-PCR showed that AMC-SP cells expressed the Oct-4, Sox-2, and Rex-1 genes. Immunocytochemistry revealed that all AMC-SP cells were vimentin+, CK19+, and nestin+. In addition, flow cytometry analysis showed that SP cells had high expression of CD13, CD29, CD44, CD46, CD49b, CD49c, CD49e, CD59, CD140a, and CD166 but low expression of CD 49d, and CD51. No evidence of expression was obtained for CD34, CD45, CD49a, CD56, CD90, CD105, CD106, CD117, CD133, CD271, or Flk-1. Upon appropriate differentiation protocols, AMC-SP cells differentiated to several cell lineages such as neuroectodermal, osteogenic, chondrogenic, and adipogenic cells. These results indicate that AMC-SP cells have multilineage potential to several cell lineages with unique immunological characteristics such as HLA I/II or HLA I+/II. AMC-SP cells should be of considerable value for regenerative medicine because they do not induce acute rejection after allotransplantation, they do not cause ethical issues, and there is no limit of supply.
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Keywords: Amnion mesenchymal cells; Mesenchymal cells; Multilineage potential; Side population cells; Stem cells

Document Type: Research Article

Publication date: 2008-03-01

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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.

    Cell Transplantation is now being published by SAGE. Please visit their website for the most recent issues.

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