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Ultrastructural changes induced by benzo[a]pyrene in sea bass (Dicentrarchus labrax) liver and intestine: importance of the intoxication route.
Lemaire, P; Berhaut, J; Lemaire-Gony, S; LaFaurie, M.
Affiliation
  • Lemaire P; Laboratoire de Biotransformation et Cancérogenèse, Faculté de Médecine, Nice, France.
Environ Res ; 57(1): 59-72, 1992 Feb.
Article in En | MEDLINE | ID: mdl-1740096
The ultrastructural effects of benzo[a]pyrene (BaP) on sea bass (Dicentrarchus labrax) liver and intestine were studied after experimental intoxication by two different routes: intraperitoneal injection and force-feeding. In both hepatocytes and enterocytes, the main structural perturbations concerned a large development of both rough and smooth endoplasmic reticulum and a great increase in the number of vacuoles and lysosomes in BaP-treated fish. After 17 days of contamination, some nuclear changes were observed, indicating the high reactivity of BaP metabolites which form covalent adducts with DNA and the long-term toxicity of this compound. However, in the intestine, after force-feeding intoxication, more perturbations were seen, particularly concerning the mitochondria. Both organs were altered in a different way with respect to the intoxication route. In BaP intraperitoneal injected fish, the liver was the first injured organ and presented heavier injuries than intestine. In force-feeding treated fish, the intestinal epithelium was the first concerned tissue and it was highly modified after BaP intoxication. The importance of the intoxication pathway in the effects of BaP on liver and intestine was discussed with special reference to their role in BaP uptake, metabolism, and distribution in the organism.
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Collection: 01-internacional Database: MEDLINE Main subject: Benzo(a)pyrene / Bass / Intestines / Liver Limits: Animals Language: En Journal: Environ Res Year: 1992 Document type: Article Affiliation country: France Country of publication: Netherlands
Search on Google
Collection: 01-internacional Database: MEDLINE Main subject: Benzo(a)pyrene / Bass / Intestines / Liver Limits: Animals Language: En Journal: Environ Res Year: 1992 Document type: Article Affiliation country: France Country of publication: Netherlands