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. 1986 Oct 1;239(1):179–183. doi: 10.1042/bj2390179

Regulation of collagen production and collagen mRNA amounts in fibroblasts in response to culture conditions.

S R Quinones, D S Neblock, R A Berg
PMCID: PMC1147257  PMID: 3800977

Abstract

Collagen synthesis and mRNA amounts for the alpha 1 and alpha 2 polypeptide chains of Type I collagen were measured in embryonic-chick tendons and in tendon cells both in suspension and in primary cultures. The percentage of protein production represented by collagen in suspension-cultured cells was initially the same as in the intact tendon; however, on an hourly basis, there was actually a steady decline in collagen production by suspended cells. Collagen production in primary cultures of chick tendon fibroblasts was decreased when compared with intact tendon, even though ascorbate-supplemented primary cultures were able to maintain higher rates of collagen production than were non-supplemented cultures. The amounts of mRNA for alpha 1(I) and alpha 2(I) polypeptide chains of collagen responded in similar fashions to different culture conditions and were compared with the amounts of mRNA for beta-actin. In primary cultures the available alpha 1 and alpha 2 collagen mRNAs support proportionately higher collagen production than in the intact tendon. However, the ratio of alpha 1/alpha 2 mRNA and polypeptide-chain synthesis did not remain 2:1, but increased with the concomitant production of Type I trimers composed of three alpha 1 chains. Removal of fibroblasts from their environment in vivo appears to alter the amounts of mRNA for alpha 1 and alpha 2 chains and to alter the utilization of those mRNAs for polypeptide synthesis.

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Selected References

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