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Interactions between N-acetylcysteine and ascorbic acid in modulating mutagenesis and carcinogenesis.
F D'Agostini1, R M Balansky, A Camoirano
1Department of Health Sciences, University of Genoa, Genoa, Italy.
International Journal of Cancer
|November 10, 2000
Summary
N-acetylcysteine (NAC) prevents adverse effects of ascorbic acid (AsA, vitamin C) on mutagenicity. The combination of NAC and AsA additively inhibits chromium mutagenicity and urethane-induced lung tumors in mice, suggesting potential in cancer chemoprevention.
Area of Science:
- Biochemistry
- Toxicology
- Cancer Research
Background:
- Ascorbic acid (AsA, vitamin C) and N-acetylcysteine (NAC) have protective biological properties.
- AsA can act as a pro-oxidant, causing adverse effects under certain conditions.
- The interaction between AsA and NAC in preventing mutation and cancer requires investigation.
Purpose of the Study:
- To evaluate the interaction between NAC and AsA in preventing mutation and cancer.
- To determine if NAC can counteract the pro-oxidant effects of AsA.
- To assess the combined efficacy of NAC and AsA in chemoprevention.
Main Methods:
- Bacterial mutagenicity assays using Salmonella typhimurium strains TA102 and TA104.
- In vivo study using A/J mice treated with urethane (carcinogen).
- Administration of AsA and NAC individually and in combination to mice.
Main Results:
- AsA increased spontaneous mutations in bacterial strains, while NAC reduced background mutations and neutralized AsA's adverse effects.
- NAC and AsA showed additive effects in reducing chromium(VI) mutagenicity.
- Combined NAC and AsA significantly reduced urethane-induced lung tumor multiplicity and volume in mice more effectively than either agent alone.
Conclusions:
- NAC prevents AsA's adverse effects on spontaneous mutagenicity.
- NAC and AsA exhibit additive effects in inhibiting mutagenicity and carcinogenicity.
- The combination of NAC and AsA shows promise for cancer chemoprevention and other pharmacological applications.