Betamethasone effects on paraquat lung toxicity

C. Lavagno, Cecilia R Giulivi, A. Boveris

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

1. Betamethasone (1 mg/ml) was administered i.v. to adult Wistar rats 3h before paraquat injection (30 mg/ml) and various parameters of lung function were studied to determine the effect of an anti-inflammatory drug in paraquat lung toxicity. 2. Rats treated with both drugs showed not only increases in spontaneous lung chemiluminescence (90% malondialdehyde formation (40% migration of PMN cells to the lungs (450% and lung wet wt (20% but also the survival times were decreased to 25% at day 7. 3. The data indicate that betamethasone exacerbates the toxic effects of paraquat. The mechanism can be explained in terms of inhibition of phospholipase A2 activity, which may increase the accumulation of hydroperoxide, produced by paraquat redox cycling upon lipid membranes.

Original languageEnglish (US)
Pages (from-to)1003-1011
Number of pages9
JournalXenobiotica
Volume21
Issue number8
DOIs
StatePublished - 1991
Externally publishedYes

ASJC Scopus subject areas

  • Pharmacology
  • Toxicology
  • Biochemistry
  • Health, Toxicology and Mutagenesis
  • Biochemistry, Genetics and Molecular Biology(all)

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