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Studies of the tumorigenic potential of 4-substituted phenylhydrazines by the subcutaneous route
Abstract:
4-Methylphenylhydrazine hydrochloride (4-MPH) was administered to randomly bred Swiss mice as 26 weekly sc injections of 140 microgram per gram of body weight and N'-acetyl-4-(hydroxymethyl)phenylhydrazine (AMPH) as 26 weekly sc injections of 500 microgram/g. As a solvent control, physiological saline was also given as 26 weekly sc injections of 0.01 ml/g. The 4-MPH treatment induced a significant incidence (24%) of fibrosarcomas in males. In the 4-MPH-treated females and some AMPH-treated male mice, a few soft-tissue tumors were observed; however, their appearance could not be related to treatment. 4-MPH is formed under special experimental conditions from 4-hydroxymethylphenyl-hydrazine, which is an in vitro breakdown product of agaritine, an ingredient of the cultivated mushroom Agaricus bisporus. The implications of the findings are discussed.
Insights
4-Methylphenylhydrazine hydrochloride (4-MPH) caused fibrosarcomas in male mice. This chemical is derived from agaritine, found in the common mushroom Agaricus bisporus, suggesting potential health risks from mushroom consumption.
Area of Science:
- Toxicology
- Carcinogenesis
- Chemical carcinogenesis
Background:
- Agaritine, present in Agaricus bisporus mushrooms, can break down into 4-hydroxymethylphenyl-hydrazine.
- Under specific conditions, 4-hydroxymethylphenyl-hydrazine forms 4-methylphenylhydrazine hydrochloride (4-MPH).
Purpose of the Study:
- To investigate the carcinogenic potential of 4-MPH and N'-acetyl-4-(hydroxymethyl)phenylhydrazine (AMPH) in Swiss mice.
- To assess the health implications of agaritine breakdown products.
Main Methods:
- Swiss mice received weekly subcutaneous injections of 4-MPH or AMPH for 26 weeks.
- A control group received physiological saline injections.
- Tumor incidence was monitored and analyzed.
Main Results:
- 4-MPH treatment resulted in a significant 24% incidence of fibrosarcomas in male mice.
- A few soft-tissue tumors were observed in 4-MPH-treated females and some AMPH-treated males, but were not definitively linked to treatment.
- No significant tumors were observed in the control group.
Conclusions:
- 4-MPH demonstrates carcinogenic activity, specifically inducing fibrosarcomas in male mice.
- The findings suggest a potential risk associated with the consumption of mushrooms containing agaritine due to its breakdown products.
- Further research is warranted to fully understand the toxicological profile of agaritine and its metabolites.