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Investigation of the effects of α-tocopherol on the levels of Fe, Cu, Zn, Mn, and carbonic anhydrase in rats with bleomycin-induced pulmonary fibrosis

Abstract

This study was designed to examine the effects of vitamin E on the levels of Zn, Mn, Cu, Fe, and carbonic anhydrase in rats with bleomycin-induced pulmonary fibrosis. Twenty-one male Wistar albino rats were randomly divided into three groups: bleomycin alone, bleomycin+vitamin E, and saline alone (control group). The bleomycin group was given 7.5 mg/kg body weight (single dose) bleomycin hydrochloride intratracheally. The bleomycin+vitamin E group was also instilled with bleomycin hydrochloride but received injections of α-tocopherol twice a week. The control group was treated with saline alone. Animals were sacrified 14 d after intratracheal instillation of bleomycin. Tissue Zn, Mn, Cu, Fe, and carbonic anhydrase activities were measured in the lung and liver. Lung Cu, Fe, and carbonic anhydrase activity increase in both experimental groups. Zn and Mn levels decreased, except for the Mn level in the bleomycin group. Liver Zn, Mn, and Cu levels decreased in both experimental groups compared to the control group, whereas Fe and carbonic anhydrase activity increased in comparison to the control group. However, the liver tissue Fe level decreased compared to the control group. In the histopathologic assesment of lung sections in the bleomycin+vitamin E group, partial fibrotic lesions were observed, but the histopathologic changes were much less severe compared to the bleomycin-treated group.

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Correspondence to Ali Ertekin.

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Ertekin, A., Değer, Y., Mert, H. et al. Investigation of the effects of α-tocopherol on the levels of Fe, Cu, Zn, Mn, and carbonic anhydrase in rats with bleomycin-induced pulmonary fibrosis. Biol Trace Elem Res 116, 289–300 (2007). https://doi.org/10.1007/BF02698013

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Index entries

  • Bleomycin
  • carbonic anhydrase
  • pulmonary fibrosis
  • tissue trace elements