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Combined effects of growth factors and static mechanical compression on meniscus explant biosynthesis.

Abstract：

OBJECTIVE:To compare the actions of fibroblast growth factor-basic (bFGF), insulin-like growth factor-I (IGF-I), platelet derived growth factor-AB (PDGF-AB), and transforming growth factor-beta 1 (TGF-beta1) on bovine meniscus tissue explants with and without static mechanical compression. DESIGN:Meniscus tissue explants were cultured in a serum-free environment supplemented with an individual growth factor (1) over a range of concentrations for 4 days, (2) at a single concentration for 2-14 days, and (3) at a single concentration for 4 days coupled with graded levels of static compression. Explants were analyzed for accumulation of newly synthesized proteoglycan and total protein as measured by 35S-sulfate and 3H-proline incorporation, respectively. RESULTS:Over the range of chosen concentrations, TGF-beta1 was the most potent stimulator of both protein and proteoglycan production, whereas bFGF was the least effective stimulator. Over a 2-week period for all four growth factors, the stimulation of proteoglycan production was sustained while there was no stimulation of protein production during this period. The superposition of static mechanical compression inhibited matrix production in the presence of each anabolic factor, with comparable inhibition relative to uncompressed controls for all factors. CONCLUSIONS:The growth factors chosen exhibited an anabolic effect on the meniscus tissue explants, encouraging matrix production and deposition. The addition of static mechanical compression produced comparable relative inhibition of matrix production for each growth factor, suggesting that static compression and growth factors may modulate meniscal fibrochondrocyte biosynthesis via distinct pathways.

journal_name

Osteoarthritis Cartilage

journal_title

Osteoarthritis and cartilage

authors

Imler SM,Doshi AN,Levenston ME

doi

10.1016/j.joca.2004.05.007

keywords:

subject

Has Abstract

pub_date

2004-09-01 00:00:00

pages

736-44

issue

9

eissn

1063-4584

issn

1522-9653

pii

S1063458404000925

journal_volume

12

pub_type

杂志文章

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