期刊
EXPERIMENTAL HEMATOLOGY
卷 32, 期 12, 页码 1212-1225出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.exphem.2004.09.003
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Objective. Mesenchymal stem cells (MSC) are promising candidates for cell-based therapies. One major obstacle for their clinical use is the biosafety of fetal calf serum (FCS), which is a crucial part of all media currently used for the culture of MSC. Methods. Nine donors each contributed 5 mL of bone marrow aspirate. Isolation of MSC was conducted according to Caplan et al., although for expansion we used low-density seeding with 20 MSC/cm(2). Four different media A, B, C, and D were tested, containing 1%, 3%, or 10% autologous serum (AS), or 10% selected FCS, respectively. MSC were cultured on 24-well plates until passage 2 and counted under the microscope at regular intervals. Osteogenic and adipogenic differentiation were induced in vitro by using a modified standard cocktail and were evaluated semi-quantitatively through a microscope. Results. Isolation of MSC after 3 days appeared best in media C with almost always C > D congruent to B > A. Proliferation was exponential with generally C > D > B > A. Morphologically, MSC isolated and expanded in medium C were indistinguishable from those in medium D. Phenotypic markers of MSC grown in medium C were: CD34(-), CD45(-), CD90(+), CD105(+), MHC class I+, MHC class II-, similar to MSC isolated and grown in medium D. Moreover, MSC grown in medium C showed more osteogenic potential than those from medium D in all cases: C+++, D++, B+, A 0. Cells retained their immaturity as shown by adipogenic differentiation and it always was: D+++, C++, B+, A 0. Conclusions. Growth of MSC in a FCS-free medium is feasible without addition of growth factors. Ten percent AS appears at least as good as 10% FCS with regard to both isolation and expansion of human MSC, while 1% and 3% AS appear inferior. With respect to osteogenic differentiation, 10% AS proved superior to the other serum conditions. (C) 2004 International Society for Experimental Hematology. Published by Elsevier Inc.
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