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Inhibitory effects of phenolic compounds on benzo(a)pyrene-induced neoplasia
Abstract:
The inhibitory effects of 18 synthetic phenolic compounds added to the diet on benzo(a)pyrene-induced neoplasia of the forestomach of female ICR/Ha mice have been determined. Seven of the compounds showed suppression of neoplasia. The most potent inhibitors were p-methoxyphenol, 2-tert-butyl-4-hydroxyanisole [the minor isomer of 2(3)-tert-butyl-4-hydroxyanisole] and 3,5-di-tert-butylcatechol. A second group of compounds with a weaker inhibitory activity consisted of 3,5-di-tert-butylphenol, 3-tert-butyl-4-hydroxyanisole [the major isomer of 2(3)-tert-butyl-4-hydroxyanisole], 2-tert-butylhydroquinone, and 2-tert-butylphenol. In additional experiments, three naturally occurring phenolic derivatives of cinnamic acid, i.e., o-hydroxycinnamic acid, 3,4-dihydroxycinnamic acid (caffeic acid), and 4-hydroxy-3-methyoxycinnamic acid (ferulic acid), were investigated. All three suppressed benzo(a)pyrene-induced neoplasia of the forestomach. Humans ingest a variety of phenols. Data as to the inhibitory capacities of members of this group of compounds are of importance for evaluating the role that they play in determining the reaction to exposure to chemical carcinogens.
Insights
Certain phenolic compounds can inhibit benzo(a)pyrene-induced forestomach tumors in mice. Potent inhibitors include p-methoxyphenol and 2-tert-butyl-4-hydroxyanisole, suggesting dietary phenols may influence carcinogen response.
Area of Science:
- Toxicology
- Chemoprevention
- Carcinogenesis
Background:
- Benzo(a)pyrene is a known carcinogen that can induce forestomach neoplasia in mice.
- Phenolic compounds are commonly found in the human diet and their biological activities are of interest.
- Understanding the inhibitory effects of phenols on carcinogen-induced tumors is crucial for public health.
Purpose of the Study:
- To evaluate the inhibitory effects of synthetic and naturally occurring phenolic compounds on benzo(a)pyrene-induced forestomach neoplasia in mice.
- To identify potent phenolic inhibitors of chemical carcinogenesis.
Main Methods:
- Administration of 18 synthetic phenolic compounds and 3 cinnamic acid derivatives to the diet of female ICR/Ha mice.
- Induction of forestomach neoplasia using benzo(a)pyrene.
- Assessment of tumor suppression by the tested phenolic compounds.
Main Results:
- Seven of the 18 synthetic phenolic compounds demonstrated significant suppression of benzo(a)pyrene-induced neoplasia.
- p-Methoxyphenol, 2-tert-butyl-4-hydroxyanisole (minor isomer), and 3,5-di-tert-butylcatechol were the most potent inhibitors.
- Three naturally occurring phenolic derivatives of cinnamic acid (o-hydroxycinnamic acid, caffeic acid, and ferulic acid) also suppressed neoplasia.
Conclusions:
- Dietary intake of specific phenolic compounds can inhibit chemical carcinogen-induced forestomach tumors in a mouse model.
- These findings highlight the potential chemopreventive role of dietary phenols against carcinogens.
- Further research is warranted to understand the mechanisms and human relevance of these inhibitory effects.