Document Detail

Toxicity Of The Herbicide Linuron As Assessed By Bacterial And Mitochondrial Model Systems.
MedLine Citation:
PMID:  24747295     Owner:  NLM     Status:  Publisher    
Linuron is one of the most intensively used herbicides with predictable effects on the environment and non-target organisms. In the present study, two in vitro biological models (a Bacillus sp. and rat liver mitochondria) were used to evaluate linuron toxicity at a cell/subcellular level. Linuron inhibited bacterial growth and NADH-supported respiration, similar IC50 values being estimated for both toxic responses (74 and 98 μM, respectively). At concentrations up to 120 μM, linuron perturbed the respiration and phosphorylation efficiency of rat liver mitochondria, reflected by an increase of state 4 respiration and a decrease of the transmembrane potential, state 3 and FCCP-uncoupled respiration, when malate/glutamate or succinate were used as respiratory substrates. Consequently, a decrease of the respiratory control and ADP/O ratio was observed. This study suggests that linuron membrane interactions with adverse repercussions in the activity of membrane enzymatic complexes, such as those which constitute the prokaryotic and mitochondrial respiratory systems, may underlie the toxic effects exerted by that herbicide on non-target organisms. Moreover, this work contributes to the establishment of our bacterial model system as a good tool for chemical toxicity screening.
Sandra M A Santos; Romeu A Videira; Maria A S Fernandes; Maria S Santos; António J M Moreno; Joaquim A F Vicente; Amália S Jurado
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-4-16
Journal Detail:
Title:  Toxicology in vitro : an international journal published in association with BIBRA     Volume:  -     ISSN:  1879-3177     ISO Abbreviation:  Toxicol In Vitro     Publication Date:  2014 Apr 
Date Detail:
Created Date:  2014-4-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8712158     Medline TA:  Toxicol In Vitro     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014 Elsevier Ltd. All rights reserved.
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