Vitamin A pretreatment and bleomycin induced rat lung injury

M. P. Habib, D. L. Lackey, R. C. Lantz, R. E. Sobonya, R. Grad, D. L. Earnest, J. W. Bloom

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

Possible antioxidant effects of pretreatment with vitamin A on bleomycin- induced rat lung injury were studied. Intratracheal bleomycin was administered to rats pretreated with vitamin A (50,000 IU/day) or vehicle control. Analysis of bronchoalveolar lavage fluid (BAL) total and differential cell counts, lung weight, lung pathology, and alveolar macrophage superoxide anion production were performed before and at various time points after the instillation of bleomycin. Bleomycin with vehicle raised total BAL cell count and the per cent of BAL neutrophils at day 7 post injury. The percent of lung involved with pneumonitis, the lung wet weight/body weight ratio and the alveolar macrophage superoxide anion production were also increased after bleomycin alone compared to the group pretreated with vitamin A. Rats pretreated with vitamin A demonstrated a statistically significant reduction in total BAL cell count and in alveolar macrophage superoxide anion production 7 days after bleomycin compared with vehicle control. Lung wet weight/body weight ratio 7 days after bleomycin was reduced in the vitamin A treated rats. There was a trend to less pneumonitis in the vitamin A pretreated group. These data suggest that vitamin A attenuates bleomycin induced pulmonary damage by a mechanism which involves inhibition of bleomycin-induced alveolar macrophage superoxide anion production.

Original languageEnglish (US)
Pages (from-to)199-208
Number of pages10
JournalResearch Communications in Chemical Pathology and Pharmacology
Volume81
Issue number2
StatePublished - Jan 1 1993

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Toxicology
  • Pharmacology
  • Pharmacology, Toxicology and Pharmaceutics(all)

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