RESUMEN
The authors examined experimental albino rats, treated with low vinyl chloride doses via electronmicroscopic autoradiography by marking with thymidine H3. It was established that no blastic processes developed in liver with the low vinyl chloride doses used. THe authors found a certain inhibition of the plastic functions of hepatocytes, manifested by the diminished marking of thymidine H3 in the nuclei of hepatocytes and Kupffer cells, being of essential importance for an eventual development of the blastic processes in liver.
Asunto(s)
Hígado/efectos de los fármacos , Cloruro de Vinilo/toxicidad , Compuestos de Vinilo/toxicidad , Animales , Autorradiografía , División Celular , Relación Dosis-Respuesta a Droga , Hígado/patología , Hígado/ultraestructura , Neoplasias Hepáticas Experimentales/inducido químicamente , Microscopía Electrónica , RatasRESUMEN
White male Wistar rats were treated with Aflatoxin B1 for 2 months while on standard pellet food ad libitum or 80% undernutrition. Although each animal received 400 micrograms of AFB1 no cancer in the liver or elsewhere developed. Histologically the findings in the groups treated with the mycotoxin were the well known until now. Undernutrition led to atrophic and degenerative changes in the liver. Electronmicroscopically there were found marked changes in the nucleus, with microsegregation of the nucleolus; diminution and disorganization of endoplasmic reticulum and mitochondria; changes in the lysosomes, abundance of microbodies etc. with difference according to the intoxication, nutrition, or both of them. However, the combination of the 2 etiologic factors did not lead to a simple summation of the deleterious effect. At the same time, we do not have the right to claim a real "anticarcinogenic" action of undernutrition.