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. 1987 Jan 1;241(1):49–54. doi: 10.1042/bj2410049

Collagen metabolism in fibrotic liver. Effects of concanavalin A and aggregated myeloma immunoglobin G.

S Takahashi, M J Lee
PMCID: PMC1147522  PMID: 2882749

Abstract

We previously have shown [Takahashi & Kobayashi (1982) Hepatology 2, 249-254] that the administration of concanavalin A to mice with schistosomiasis caused liver collagen content to be reduced by 50%. Here we report the effects of concanavalin A and aggregated mouse myeloma IgG on liver lysyl oxidase activity and present further evidence concerning the possible mechanism by which the liver collagen content was decreased in infected-treated mice. The lysyl oxidase activity at 8 weeks after infection in both treated mice and untreated infected controls was about 28-fold greater than in the age-matched uninfected controls. The specific radioactivity of intracellular free [14C]proline, the rate of collagen synthesis, the ratio of collagenase-sensitive, protein-bound, hydroxyproline to proline of collagen and the intracellular degradation of newly synthesized collagen were similar in treated animals and in untreated infected controls. In contrast, the extracellular degradation of newly secreted collagen and the specific radioactivity of protein-bound [14C]hydroxyproline in the agent-treated groups were about 2-fold greater than those in the untreated infected controls. These results suggest that the observed 50% decrease in content of liver collagen of mice treated with the agents apparently was due to the increased extracellular degradation of newly secreted collagen.

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Selected References

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