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bFGF influences human articular chondrocyte differentiation.

Abstract：

BACKGROUND:The possible functional role of basic fibroblast growth factor (bFGF) in regulating the mitotic and metabolic activity of primary human articular chondrocytes was investigated. METHODS:[EF1]Chondrocytes were enzymatically isolated from femoral head cartilage, and were cultured in vitro in monolayer. bFGF-dependent cell proliferation, production of collagen type II and aggrecan were monitored 10 days after isolation. Furthermore, effect of bFGF on cell cycle, cell morphology, and mRNA expression of integrins and chondrogenic markers determined by real time PCR were analyzed. RESULTS:bFGF concentrations in supernatants of primary human articular chondrocytes peaked immediately after isolation and then declined. In a dose-dependent manner, bFGF enhanced cell amplification and viability. BFGF induced a decrease in the apoptotic cell population, while the number of proliferating cells remained unchanged. Supplementation of cell culture with bFGF reduced collagen type II mRNA by 49%, but increased expression of the integrin alpha(2) by 70%. bFGF did not significantly regulate the integrins alpha(1), alpha(5), alpha(10), alpha(v) and type I collagen. bFGF reduced the amount of collagen type II by 53%, which was correlated with diminished mRNA production. Monolayer cultured chondrocytes secreted significant amounts of aggrecan that decreased over time. Secretion of this cartilage-specific marker was further reduced by the addition of bFGF. DISCUSSION:These findings highlight the potential role of bFGF as an endogenous chondrocyte mediator that can enhance cell amplification and regulate cell differentiation.

journal_name

Cytotherapy

journal_title

Cytotherapy

authors

Schmal H,Zwingmann J,Fehrenbach M,Finkenzeller G,Stark GB,Südkamp NP,Hartl D,Mehlhorn AT

doi

10.1080/14653240601182846

subject

Has Abstract

pub_date

2007-01-01 00:00:00

pages

184-93

issue

2

eissn

1465-3249

issn

1477-2566

pii

776077757

journal_volume

9

pub_type

杂志文章

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