Levels of interleukin‑6, superoxide dismutase and malondialdehyde in the lung tissue of a rat model of hypoxia‑induced acute pulmonary edema

Gao,Hengbo; Tian,Yingping; Wang,Wei; Yao,Dongqi; Zheng,Tuokang; Meng,Qingbing

doi:10.3892/etm.2015.2962

Levels of interleukin‑6, superoxide dismutase and malondialdehyde in the lung tissue of a rat model of hypoxia‑induced acute pulmonary edema

Authors:
- Hengbo Gao
- Yingping Tian
- Wei Wang
- Dongqi Yao
- Tuokang Zheng
- Qingbing Meng
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Affiliations: Department of Emergency Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China, Department of Hepatology, The Fifth Hospital of Shijiazhuang, Shijiazhuang, Hebei 050021, P.R. China
Published online on: December 29, 2015 https://doi.org/10.3892/etm.2015.2962
Pages: 993-997

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Abstract

The present study aimed to investigate the levels of malondialdehyde (MDA), superoxide dismutase (SOD) and interleukin (IL)‑6 in the lung tissue of a rat model of acute pulmonary edema induced by acute hypoxia, and its pathophysiological significance. A total of 48 adult Wistar rats were randomly divided into group A, a normal group; group B, a model of acute pulmonary edema induced by hypoxia for 24 h; group C, a model of acute pulmonary edema induced by hypoxia for 48 h; and group D, a model of acute pulmonary edema induced by hypoxia for 72 h. The rats in groups B‑D were intraperitoneally injected with 6% ammonium chloride to establish the model of acute pulmonary edema, and were subsequently sacrificed following successful modeling for 24, 48 and 72 h. The plasma of rats was isolated and the lungs of the rats were removed. Subsequently, a 10% lung homogenate was prepared and the contents and the activities of MDA, SOD and IL‑6 in the lung tissue and IL‑6 in the plasma were detected by enzyme‑linked immunosorbent assay. MDA and IL‑6 expression levels increased and SOD activity decreased in the lung tissue in group B as compared with group A; however the difference did not reach significance (P>0.05). MDA, IL‑6 and SOD levels in the lung tissue of rats were significantly altered following the increased duration of pulmonary edema in groups C and D, as compared group A (P<0.05). The plasma IL‑6 levels of the rats in groups B‑D significantly increased, as compared with those in group A (P<0.05). In conclusion, the results of the present study demonstrated that the incidence of acute pulmonary edema may be associated with oxidative stress. Furthermore, decreased antioxidant capacity and increased free radical levels may be associated with pulmonary edema, as in the present study the levels of IL‑6, SOD and MDA in the lung tissue were observed to be associated with the pathological changes of the disease.

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