Early exposure to restraint stress enhances chemical carcinogenesis in rat liver.
Cancer Lett
; 161(2): 215-20, 2000 Dec 20.
Article
em En
| MEDLINE
| ID: mdl-11090972
ABSTRACT
This study examines the effect of a stress-associated condition on chemical hepatocarcinogenesis in the rat. Rats were given diethylnitrosamine (200 mg/kg. b.w., i.p.), followed, 1 week later, by three cycles of immobilization at room temperature. Two weeks after the last cycle they were treated according to the resistant hepatocyte protocol. At 4 weeks after selection, mean size of glutathione-S-transferase 7-7 positive foci/nodules was increased in the immobilized group (0.82+/-0.22 vs. 0.25+/-0.04 mm(2) in controls). Furthermore, at the end of 1 year 10/13 animals (77%) developed hepatocellular carcinoma in the former group, while only 6/14 (43%) incidence of cancer was found in controls. These results indicate that exposure to restraint stress early during carcinogenesis enhances the development of chemically-induced hepatocellular carcinoma in the rat.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Estresse Fisiológico
/
Neoplasias Hepáticas
Limite:
Animals
Idioma:
En
Revista:
Cancer Lett
Ano de publicação:
2000
Tipo de documento:
Article
País de afiliação:
Itália