Stem Cell Research & Therapy | |
Native extracellular matrix preserves mesenchymal stem cell “stemness” and differentiation potential under serum-free culture conditions | |
Xiao-Dong Chen4  David D. Dean3  Qiuxia Dai3  Junjie Wu2  Milos Marinkovic3  Shannan M. Johnson1  Travis J. Block3  Rubie Rakian3  | |
[1]Periodontics Graduate Program, Wilford Hall 59th Medical Wing, 2133 Pepperrell Street, Building 3352, Joint Base San Antonio, Lackland 78236, TX, USA | |
[2]Department of Orthodontics, Fourth Military Medical University, School of Stomatology, 145 West Chang-le Road, Xi’an 710032, Shaanxi Province, P.R. China | |
[3]Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio 78229-3900, TX, USA | |
[4]Research Service, Audie Murphy VA Medical Center, South Texas Veterans Health Care System, 7400 Merton Minter Boulevard, San Antonio 78229-4404, TX, USA | |
关键词: Stem cell expansion; Serum-free media; Extracellular matrix; Mesenchymal stem cells; | |
Others : 1235094 DOI : 10.1186/s13287-015-0235-6 |
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received in 2015-07-24, accepted in 2015-11-10, 发布年份 2015 | |
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【 摘 要 】
Introduction
Bone marrow-derived mesenchymal stem cells (BM-MSCs) for clinical use should not be grown in media containing fetal bovine serum (FBS), because of serum-related concerns over biosafety and batch-to-batch variability. Previously, we described the preparation and use of a cell-free native extracellular matrix (ECM) made by bone marrow cells (BM-ECM) which preserves stem cell properties and enhances proliferation. Here, we compare colony-forming ability and differentiation of MSCs cultured on BM-ECM with a commercially available matrix (CELLstart™) and tissue culture plastic (TCP) under serum-free conditions.
Methods
Primary MSCs from freshly isolated bone marrow-derived mononuclear cells or passaged MSCs (P1) were grown in serum-containing (SCM) or serum-free (SFM) media on BM-ECM, CELLstart™, or TCP substrates. Proliferation, cell composition (phenotype), colony-forming unit replication, and bone morphogenetic protein-2 (BMP-2) responsiveness were compared among cells maintained on the three substrates.
Results
Proliferation of primary BM-MSCs was significantly higher in SCM than SFM, irrespectively of culture substrate, suggesting that the expansion of these cells requires SCM. In contrast, passaged cells cultured on BM-ECM or CELLstart™ in SFM proliferated to nearly the same extent as cells in SCM. However, morphologically, those on BM-ECM were smaller and more aligned, slender, and long.
Cells grown for 7 days on BM-ECM in SFM were 20–40 % more positive for MSC surface markers than cells cultured on CELLstart™. Cells cultured on TCP contained the smallest number of cells positive for MSC markers. MSC colony-forming ability in SFM, as measured by CFU-fibroblasts, was increased 10-, 9-, and 2-fold when P1 cells were cultured on BM-ECM, CELLstart™, and TCP, respectively. Significantly, CFU-adipocyte and -osteoblast replication of cells grown on BM-ECM was dramatically increased over those on CELLstart™ (2X) and TCP (4-7X). BM-MSCs, cultured in SFM and treated with BMP-2, retained their differentiation capacity better on BM-ECM than on either of the other two substrates.
Conclusions
Our findings indicate that BM-ECM provides a unique microenvironment that supports the colony-forming ability of MSCs in SFM and preserves their stem cell properties. The establishment of a robust culture system, combining native tissue-specific ECM and SFM, provides an avenue for preparing significant numbers of potent MSCs for cell-based therapies in patients.
【 授权许可】
2015 Rakian et al.
【 预 览 】
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