Document Detail

Toxic effects of wastewaters collected at upstream and downstream sites of a purification station in cultures of rainbow trout hepatocytes.
MedLine Citation:
PMID:  11462136     Owner:  NLM     Status:  MEDLINE    
The toxic effects of wastewater samples, collected in December 1998, from upstream (U) and downstream (D) sites of the purification station of the town of Nice (South-East France on the coast of the Mediterranean Sea) were assessed undiluted and at various dilutions (75%, 50%, and 25% of collected water sample), on trout hepatocyte cultures treated for 48 or 72 h. Chemical contamination (PCBs, PAHs, Cd, Cu, Pb, and Zn) was also evaluated by chemical analysis. The water samples from the upstream site were more cytotoxic than those from the downstream site. The induction of CYP1A enzyme and metallothioneins (MTs) were selected as specific indicators of exposure to organic contaminants and metals, respectively. CYP1A-related EROD activity as well as protein expression were found to be greatly induced after 72 h exposure of the hepatocytes to the undiluted water samples (U(100%) and D(100%)), but CYP1A1 mRNA was significantly overexpressed only by samples from the upstream site. Maximal MT levels were reached after 48 h of treatment with the least concentrated water samples (U(25%) and D(25%)). Glutathione S-transferase (GST) activities were similarly increased under the same conditions. On the other hand, there was no significant glutathione peroxidase (GPx) activity response. Induction of apoptosis was analyzed by using as markers both the fragmentation of the nuclear DNA into oligonucleosomal-length fragments recognized as a "DNA ladder" and the activation of DEVD (Asp-Glu-Val-Asp)-dependent protease considered as the central mediator of programmed cell death. Significant DNA cleavage was only detectable after 72-h exposure to the most concentrated water samples from upstream sites (U(75%) and U(100%)). DEVD-dependent protease activities were significantly increased, mainly in cells exposed to U(75%) and D(25%) for 72 h. In addition, pollution-related DNA damage assessed by using the Comet assay was approximatively 1.5 times greater than that of the control level with the undiluted water samples U(100%) and D(100%), after 72-h and 48-h exposure, respectively. The present study shows that such a multibiomarker-based approach could provide complementary information, for aquatic pollution monitoring, about the early biochemical effects in cells exposed to complex chemical pollution and could be considered as early warning systems to aquatic pollution.
C Risso-de Faverney; A Devaux; M Lafaurie; J P Girard; R Rahmani
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Archives of environmental contamination and toxicology     Volume:  41     ISSN:  0090-4341     ISO Abbreviation:  Arch. Environ. Contam. Toxicol.     Publication Date:  2001 Aug 
Date Detail:
Created Date:  2001-07-19     Completed Date:  2001-09-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0357245     Medline TA:  Arch Environ Contam Toxicol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  129-41     Citation Subset:  IM    
Laboratoire de Pharmaco-toxicologie Cellulaire et Moléculaire, Centre de Recherche INRA 41, Bd du Cap, BP 2078, 06606 Antibes cedex, France.
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MeSH Terms
Biological Markers / analysis
Cytochrome P-450 Enzyme System / drug effects,  metabolism*
DNA Damage*
Environmental Exposure
Hepatocytes / drug effects
Metals, Heavy
Oncorhynchus mykiss / physiology*
Organic Chemicals
Refuse Disposal / methods*
Water Movements
Water Pollutants / toxicity*
Water Supply*
Reg. No./Substance:
0/Biological Markers; 0/Metals, Heavy; 0/Organic Chemicals; 0/Water Pollutants; 9035-51-2/Cytochrome P-450 Enzyme System

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