Adventage of mesenchymal stem cells (MSC) expansion directly from purified bone marrow CD105+ and CD271+ cells

被引:57
作者
Jarocha, Danuta [2 ]
Lukasiewicz, Ewa [2 ]
Majka, Marcin [1 ,2 ]
机构
[1] Jagiellonian Univ, Polish Amer Inst Pediat, Dept Transplantat, Coll Med, PL-30663 Krakow, Poland
[2] Univ Childrens Hosp, Ctr Transplantat, Krakow, Poland
关键词
MSC; Isolation; CD105(+); CD271(+); Expansion;
D O I
10.2478/v10042-008-0046-z
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Mesenchymal Stem Cells (MSC) are employed in gene and cellular therapies. Routinely MSC are isolated from bone marrow mononuclear cells (MNC) by plastic adherence. Here we compared new isolation strategies of bone marrow MSC including immunodepletion of hematopoietic cells and immunomagnetic isolation of CD105(+) and CD271(+) populations. Four fractions were obtained: MNC MSC, RosetteSep-isolated MSC, CD105(+) and CD271(+) sorted MSC. We evaluated i) number of CFU-F colonies, ii) cell phenotype, iii) in vitro differentiation of expanded cells and iv) expression of osteo/adipogenesis related genes. Results: Average number of day 9 CFU-F colonies was the highest for CD271 positive fraction. Real-Time PCR analysis revealed expression of RUNX2, PPAR gamma and N-cadherin in isolated cells, particularly high in CD271(+) cells. Expression of CD105, CD166, CD44, CD73 antigens was comparable for all expanded populations (over 90%). We observed various levels of hematopoietic contamination with the highest numbers of CD45(+) cells in MNC-MSC fraction and the lowest in CD105(+) and CD271(+) fractions. Cells of all the fractions were CD34 antigen negative. Expanded CD105 and CD271 populations showed higher level of RUNX2, osteocalcin, PTHR, leptin, PPAR gamma 2 and aggrecan1 genes except for alpha 1 collagen. After osteogenic differentiation CD105(+) and CD271(+) populations showed lower expression of RUNX, PPAR gamma 2 and also lower expression of osteocalcin and PTHR than MNC, with comparable alpha 1-collagen expression. Chondrogenic and adipogenic gene expression was higher in MNC. More clonogenic CD105(+) and particularly CD271(+) cells, which seem to be the most homogenous fractions based on Real-Time PCR and immunostaining data, are better suited for MSC expansion.
引用
收藏
页码:307 / 314
页数:8
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