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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Synergistic effect of growth factors on cell outgrowth from explants of rabbit anterior cruciate and medial collateral ligaments.

Cellular migration and proliferation are integral aspects of wound healing. An in vitro assay for cellular migration and proliferation using explants of rabbit anterior cruciate and medial collateral ligaments was developed previously. This study presents the effects of serum-free culture medium supplemented with basic fibroblast growth factor, bovine insulin, transforming growth factor-beta 1, and platelet-derived growth factor-B, added either individually or in combination, on cell outgrowth in explants of rabbit anterior cruciate and medial collateral ligaments. Outgrowth was assessed at 3 and 6 days by counting the number of cells surrounding the tissue explants. For explants of both ligaments, cell outgrowth was dependent on the presence of 10% fetal bovine serum or the combination of growth factors. Little outgrowth occurred in explants of either ligament in the presence of basic fibroblast growth factor, transforming growth factor-beta 1, or bovine insulin. Platelet-derived growth factor-B at concentrations of 20 and 100 ng/ml seemed to increase cell outgrowth from medial collateral ligament explants at 6 days. The outgrowth from the explants of both ligaments was much greater in the presence of all four growth factors than the sum of the outgrowth with the individual factors. This synergistic effect was as much as 10-fold and 20-fold for the anterior cruciate ligament explants at days 3 and 6, respectively, but no more than 3-fold for the medial collateral ligament explants at these times. Medial collateral ligament explants exhibited greater cell outgrowth than anterior cruciate ligament explants in 10% serum and in the presence of the four growth factors.[1]

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