Oncogenicity of k‐region epoxides of benzo(a)pyrene and 7,12‐dimethylbenz(a)anthracene
- 15 September 1976
- journal article
- research article
- Published by Wiley in International Journal of Cancer
- Vol. 18 (3) , 351-353
- https://doi.org/10.1002/ijc.2910180313
Abstract
Female Sprague‐Dawley rats were given a subcutaneous injection of the parent hydrocarbon or its K‐region epoxide in 0.1 ml sesame oil on alternate days to a total of 30 doses and observed for sarcoma at the site of injection for 275 days. The parent compounds, benzo(a)pyrene (0.2 μmole/dose) and 7,12‐dimethylbenz(a)anthracene (0.2 μmole/dose), induced sarcoma in 100% of the animals with an average latent period of 101 and 95 days, respectively, whereas five of 12 rats (42%) injected with the K‐region epoxide of B(a)P (1.0 μmole/dose), developed sarcoma in 151±22 days, and the K‐region epoxide of DMBA (0.4 μmole/dose) failed to elicit tumors. Under these experimental conditions, these K‐region epoxides are, at best, only weak carcinogens. Oncogénicité Des Époxydes De La Région K Du Benzo(A)Pyrène Et Du 7,12‐Diméthylbenz(a)anthracène Des rattes Sprague‐Dawley ont reçu tous les deux jours une injection sous‐cutanée de l'hydrocarbure initial ou de l'époxyde de sa région K dans 0.1 ml d'huile de sésame; 30 doses leur ont ainsi été administrées, puis on a examiné le point d'injection pendant 275 jours pour y déceler l'apparition d'un sarcome. Les composés initiaux — benzo (a)pyrène (0.2μmole/dose) et 7.12‐diméthylbenz (a)anthracène (0.2 μmole/dose) — ont induit un sarcome chez 100% des animaux avec une période de latence atteignant respectivement 101 et 95 jours en moyenne; l'époxyde de la région K du B (a)P (1.0 μmole/dose) a induit un sarcome chez 5 animaux sur 12 (42%) en 151 ± 22 jours, et l'époxyde de la région K du DMBA (0.4 μmole/dose) n'a fait apparaǐtre aucune tumeur. Dans ces conditions expérimentales, ces époxydes sont tout au plus de faibles carcinogènes.This publication has 17 references indexed in Scilit:
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