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Human adipose derived mesenchymal stem cells and its quality test preparation |
CHEN Chong, YAN Junling, LI Liang, XU Xiao, DING Hong, TANG Suyang |
Department of Skin Regeneration Medicine, General Hospital of Chinese People’s Armed Police Forces, Beijing 100039, China |
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Abstract Objective To study the human adipose derived mesenchymal stem cells in vitro amplification and quality inspection Methods and provide safe and qualified stem cells for clinical research. Methods Fifty human source liposuctioned fat, sheared, underwent trypsin and collagenase digestion, separation, culture, and according to the “stem cell-based medicinal product quality control of pre clinical research guiding principle” to detect the cell morphology, quantity, live rate, sterilization, mycoplasma, human source specific virus and swine virus, endotoxin, immunosuppressive activity, differentiation ability, immunophenotype detection and chromosome karyotype. Results Human adipose derived mesenchymal stem cell activity before cryopreservation is ≥92%, after revival≥82%; bacteria and endotoxin test negative, no internal and external source pathogenic bacteria; stem cell immunophenotype detection of CD90, CD105 positive, the positive rate>95%, CD34, CD45 and HLA-DR negative expression, the positive rate<2%; with osteogenic and adipogenic differentiation proficiency , it can inhibit the proliferation of allogeneic lymphocytes. Conclusions The preparation process and the standard of human adipose derived mesenchymal stem cell line according to the quality control standard of “stem cell-based medicinal product quality control of pre clinical research guiding principle”, it provides the experimental basis for the similar stem cell preparation and standardizing verification process.
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Received: 20 November 2014
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