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. 1982 Sep 15;206(3):505–510. doi: 10.1042/bj2060505

Influence of cell density on collagen biosynthesis in fibroblast cultures.

M Aumailley, T Krieg, G Razaka, P K Müller, H Bricaud
PMCID: PMC1158617  PMID: 7150259

Abstract

Characteristic features of collagen metabolism in human skin fibroblasts were studied in relation to cell density. Measuring peptide-bound hydroxyproline we found that collagen synthesis per cell decreased when cultures approached confluency. On the other hand, the relative rate of collagen synthesis (collagen/total protein) was higher in quiescent than in proliferating cultures. With increasing cell density the proportion of type III collagen in comparison with type I was found to be slightly increased. In addition, in low-density cultures [alpha I(I)]3 collagen trimers were produced in considerable amounts, whereas they were no longer detected in cultures with a high cell density. Although hydroxylation of proline residues was normal in all cell stages, conversion of procollagen into collagen was found to depend strongly on the density at which the cells were investigated. Almost no cleavage of procollagen peptides was observed in rapidly growing cells, whereas highly confluent cell cultures converted most of the newly synthesized procollagen molecules.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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