Vitamin A pretreatment and bleomycin induced rat lung injury

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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 - 1993
Externally publishedYes

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Bleomycin
Lung Injury
Vitamin A
Rats
Bronchoalveolar Lavage Fluid
Alveolar Macrophages
Superoxides
Lung
Fluids
Cell Count
Pulmonary Edema
Weights and Measures
Pneumonia
Body Weight
Pathology
Neutrophils
Antioxidants
Wounds and Injuries

ASJC Scopus subject areas

  • Pharmacology
  • Toxicology

Cite this

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title = "Vitamin A pretreatment and bleomycin induced rat lung injury",
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.",
author = "Habib, {Michael P} and Lackey, {D. L.} and Lantz, {Robert Clark} and Sobonya, {Richard E} and Roni Grad and Earnest, {D. L.} and Bloom, {John W}",
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AU - Habib, Michael P

AU - Lackey, D. L.

AU - Lantz, Robert Clark

AU - Sobonya, Richard E

AU - Grad, Roni

AU - Earnest, D. L.

AU - Bloom, John W

PY - 1993

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N2 - 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.

AB - 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.

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