当前位置： SCI文献检索 > BONE期刊下所有文献 > Expression of the developmental markers STRO-1 and alkaline phosphatase in cultures of human marrow stromal cells: regulation by fibroblast growth factor (FGF)-2 and relationship to the expression of FGF receptors 1-4.

Expression of the developmental markers STRO-1 and alkaline phosphatase in cultures of human marrow stromal cells: regulation by fibroblast growth factor (FGF)-2 and relationship to the expression of FGF receptors 1-4.

Abstract：

:Autologous marrow stromal cells have been proposed as an adjuvant in the treatment of bone defects and diseases. This will require the development of culture conditions that permit their rapid expansion ex vivo while retaining their potential for further differentiation. Fibroblast growth factor (FGF)-2 has been proposed as a candidate for the ex vivo expansion of cells with enhanced osteogenic potential, and we have explored this possibility further using cells obtained from a large cohort of adult human donors. Treatment with FGF-2 (0.001-2.5 ng/mL) had no detectable effect on colony formation, but markedly increased their proliferative potential and that of their immediate progeny, as shown by the increases in colony size and cell number. Based on the observed increase in the expression of the developmental markers STRO-1 and alkaline phosphatase (AP), a major target for the actions of FGF-2 appears to be the more primitive cells of the osteoblast lineage, and that, when added in combination with the synthetic glucocorticoid dexamethasone (Dx), it interacts positively to promote further cell maturation. The maintenance of adequate levels of ascorbate was shown to be a critical component in determining the nature of the effect of FGF-2 on AP expression. Variation in the response (predominantly in the magnitude and/or sensitivity) of the cultured cell populations to treatment with FGF-2 was apparent, but a preliminary analysis indicated that this was not due to differences in the age or gender of the donors used. The cultured cell populations were found to express multiple FGF receptors (FGFRs; 1-4) and the observed changes in the spectrum and abundance of FGFRs expressed in relation to that of STRO-1 and AP are consistent with their expression being developmentally regulated during the process of osteogenic differentiation. These results provide novel insights into the mechanism of action of FGF-2 on human cells of the osteoblast lineage and support the use of this factor, alone or in combination with Dx, for the rapid, ex vivo expansion of cell populations with enhanced osteogenic potential.

journal_name

Bone

journal_title

Bone

authors

Walsh S,Jefferiss C,Stewart K,Jordan GR,Screen J,Beresford JN

doi

10.1016/s8756-3282(00)00319-7

subject

Has Abstract

pub_date

2000-08-01 00:00:00

pages

185-95

issue

2

eissn

8756-3282

issn

1873-2763

pii

S8756-3282(00)00319-7

journal_volume

27

pub_type

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