Abstract |
3-Amino-1,4-dimethyl-5H-pyrido[4,3-b] indole (Trp-P-1) or 3-amino-1-methyl-5H-pyrido[4,3-b] indole (Trp-P-2), which is a potent mutagen from pyrolysates of tryptophan, was given subcutaneously to neonatal ICR mice, and all animals were observed for 1 year. Tumors of the livers and lymphoreticular tissue were induced. In the mice given Trp-P-1, the incidences of these tumors were as follows: liver tumors in 45% of the males; malignant lymphoma in 13% of the males and in 24% of the females. In the mice given Trp-P-2, the incidences of liver tumors in the males were dose-dependent (12.5 mg/kg, 12%; 25 mg/kg, 18%), while those of malignant lymphoma varied within a range from 5 to 19%. Statistical analysis revealed that the incidences of the liver tumor in the mice given Trp-P-1 or Trp-P-2 and those of lymphoma in the mice given Trp-P-1 were significantly higher than those of the controls. In the control mice, the incidences of tumors were as follows: malignant lymphoma in 5% of the females; lung tumor in 14% of both sexes.
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Authors | K Fujii, K Nomoto, K Nakamura |
Journal | Carcinogenesis
(Carcinogenesis)
Vol. 8
Issue 11
Pg. 1721-3
(Nov 1987)
ISSN: 0143-3334 [Print] England |
PMID | 3664965
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Carbolines
- Mutagens
- 3-amino-1-methyl-5H-pyrido(4,3-b)indole
- 3-amino-1,4-dimethyl-5H-pyrido(4,3-b)indole
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Topics |
- Age Factors
- Animals
- Animals, Newborn
- Body Weight
(drug effects)
- Carbolines
(toxicity)
- Female
- Liver Neoplasms, Experimental
(chemically induced)
- Lung Neoplasms
(chemically induced)
- Lymphoma
(chemically induced)
- Male
- Mice
- Mice, Inbred ICR
- Mutagens
- Neoplasms, Experimental
(chemically induced)
- Sex Factors
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