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Partial contribution of biliary metabolites to nephrotoxicity, renal content and excretion of [14C]hexachloro-1,3-butadiene in rats.

Authors
  • Payan, J P
  • Beydon, D
  • Fabry, J P
  • Morel, G
  • Brondeau, M T
  • Ban, M
  • De Ceaurriz, J
Type
Published Article
Journal
Journal of applied toxicology : JAT
Publication Date
Jan 01, 1993
Volume
13
Issue
1
Pages
19–24
Identifiers
PMID: 8440871
Source
Medline
License
Unknown

Abstract

Male Sprague Dawley rats with cannulated bile duct (BDC rats) received 100 or 200 mg kg-1 labelled hexachloro-1,3-butadiene ([14C]HCBD) by gavage 1 h (BDC1 rats) or 24 h (BDC24 rats) after surgical cannula implantation. Twenty-four hours after treatment with HCBD, rats were examined histochemically and biochemically for kidney damage. Urine, faeces, liver and kidney radioactivities were also measured in 24-h samples. Results were compared with those obtained from non-cannulated (NC) rats. Bile-duct cannulation did not completely protect against HCBD-induced kidney damage. The 24-h [14C] urinary excretion and tissue content was 30-50% lower in BDC rats compared to NC rats and correlated well with the toxicity findings. BDC1 rats appeared to be much more resistant to HCBD treatment than BDC24 rats. Since faecal [14C] radioactivity extractable by diethyl ether at neutral pH in BDC1 rats was twice that measured in BDC24 rats, the greater resistance was attributed to a higher deficiency in the gastrointestinal absorption of unchanged HCBD. The present results reveal that the biliary metabolites of HCBD are not solely responsible for kidney toxicity as previously assumed. They suggest a sinusoidal efflux of the HCBD conjugates from the liver.

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