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Effects of glycerol on 4-nitroquinoline 1-oxide induced pulmonary tumorigenesis in ddY mice
Abstract:
The effects of glycerol administration on pulmonary tumorigenesis induced by 4-nitroquinoline 1-oxide (4NQO) were examined in male ddY mice, that were given 5% glycerol solution instead of drinking water after a subcutaneous injection of 4NQO. The incidence of pulmonary tumor-bearing mice and the mean number of induced tumors per mouse were significantly enhanced in mice given glycerol after 4NQO treatment, compared with mice given 4NQO alone. The results demonstrate effects including that of promotion by glycerol in 4NQO-induced pulmonary tumorigenesis.
Insights
Glycerol administration significantly increased lung tumors in mice treated with 4-nitroquinoline 1-oxide (4NQO). This study suggests glycerol acts as a promoter in 4NQO-induced pulmonary tumorigenesis.
Area of Science:
- Oncology
- Toxicology
- Pharmacology
Background:
- 4-nitroquinoline 1-oxide (4NQO) is a known carcinogen used to induce experimental tumors.
- Understanding factors that promote chemical-induced carcinogenesis is crucial for risk assessment.
Purpose of the Study:
- To investigate the potential role of glycerol as a promoter in 4NQO-induced pulmonary tumorigenesis.
- To evaluate the effect of glycerol administration on lung tumor development following 4NQO exposure.
Main Methods:
- Male ddY mice were administered a subcutaneous injection of 4NQO.
- Following 4NQO treatment, mice received a 5% glycerol solution as drinking water.
- Control groups received 4NQO alone.
- Pulmonary tumor incidence and multiplicity were assessed.
Main Results:
- Mice treated with glycerol post-4NQO exhibited a significantly higher incidence of pulmonary tumors compared to controls.
- The mean number of induced pulmonary tumors per mouse was significantly elevated in the glycerol-treated group.
- Glycerol administration demonstrated a promoting effect on 4NQO-induced lung tumorigenesis.
Conclusions:
- Glycerol acts as a promoter in the development of 4NQO-induced pulmonary tumors.
- These findings highlight the potential for common substances to influence chemically induced cancer progression.