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Is alcohol hepatotoxic in the baboon?
C C Ainley1, A Senapati, I M Brown
1Gastrointestinal Laboratory, Rayne Institute, St. Thomas' Hospital, London, U.K.
Journal of Hepatology
|August 1, 1988
Summary
This study found that zinc supplementation did not prevent liver damage in baboons consuming a high-ethanol diet. The baboons showed no significant liver fibrosis or cirrhosis despite long-term alcohol intake.
Area of Science:
- Hepatology
- Nutritional Science
- Toxicology
Background:
- Alcoholic liver disease (ALD) is a significant health concern.
- Zinc deficiency is linked to ALD progression.
- Baboons are a unique animal model for studying ALD, as they develop liver fibrosis and cirrhosis on adequate diets with ethanol exposure.
Purpose of the Study:
- To investigate the effect of zinc supplementation on liver damage in baboons fed a high-ethanol diet.
- To determine if zinc can mitigate ethanol-induced hepatic injury.
Main Methods:
- Ten baboons were fed a nutritionally adequate diet with high ethanol content (up to 25 g/kg/day, 70% of calories) for up to 60 months.
- Four of the baboons received daily zinc supplementation (50 mg/day).
- Liver function tests and histology were assessed throughout the study.
Main Results:
- All baboons gained weight, and achieved significant blood ethanol concentrations (63-342 mg/dl).
- Liver histology revealed only fatty changes in most animals, with minor inflammation in some.
- No significant hepatic fibrosis or cirrhosis was observed in either the supplemented or unsupplemented groups.
Conclusions:
- Zinc supplementation did not prevent the development of significant liver fibrosis or cirrhosis in baboons exposed to a high-ethanol diet for up to 5 years.
- The baboon model, under these specific dietary and ethanol conditions, did not replicate the expected progression to severe liver damage.
- Further research is needed to understand the complex factors influencing ALD development in this model.