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Decrease in liver collagen accumulation in carbon tetrachloride-injured and normal growing rats upon administration
Gastroenterology
|March 1, 1984
Summary
Oral zinc effectively inhibits collagen accumulation in rat liver, suggesting potential for treating fibrotic conditions. This antifibrotic effect appears to involve proline hydroxylation inhibition.
Area of Science:
- Biochemistry
- Pharmacology
- Hepatology
Background:
- Developing antifibrotic drugs for human use has faced limited success.
- Fibrosis is characterized by excessive collagen accumulation in tissues.
Purpose of the Study:
- To investigate the antifibrotic effects of oral zinc treatment.
- To determine the mechanism of zinc's action on collagen synthesis.
Main Methods:
- Carbon tetrachloride-induced liver fibrosis model in rats.
- Administration of oral zinc.
- Measurement of liver collagen content, hydroxyproline excretion, and protein synthesis.
Main Results:
- Oral zinc selectively inhibited carbon tetrachloride-induced liver collagen accumulation.
- Zinc reduced skin and liver collagen content and urinary hydroxyproline excretion in normal animals.
- Zinc did not normalize liver function tests or reverse other carbon tetrachloride-induced changes.
Conclusions:
- Oral zinc exhibits a direct and selective antifibrotic effect, particularly on collagen accumulation.
- The mechanism likely involves the inhibition of proline hydroxylation, a key step in collagen synthesis.
- Zinc's antifibrotic properties may extend beyond specific injuries like carbon tetrachloride-induced fibrosis.
