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Abstract Title:

Inhibitory Effects of Astragaloside IV on Bleomycin-Induced Pulmonary Fibrosis in Rats Via Attenuation of Oxidative Stress and Inflammation.

Abstract Source:

Inflammation. 2016 Oct ;39(5):1835-41. PMID: 27525425

Abstract Author(s):

Wei-Na Yu, Li-Feng Sun, Hua Yang

Article Affiliation:

Wei-Na Yu

Abstract:

In this study, we investigated the effects of astragaloside IV (As-IV) on pulmonary fibrosis and its mechanisms of action. Sprague-Dawley rats were used in a model of pulmonary fibrosis induced by an intratracheal instillation of bleomycin (BLM). Rats were intraperitoneally injected with As-IV (10, 20, 50 mg/kg) daily for 28 days, while the rats in control and BLM groups were injected with a saline solution. The effects of As-IV treatment on pulmonary injury were evaluated with the lung wet/dry weight ratios, cell counts, and histopathologic. Oxidative stress was evaluated by detecting the levelsof malondialdehyde (MDA), superoxide dismutase (SOD), total antioxidant capacity (T-AOC), and reactive oxygen species (ROS) in lung tissue. Inflammation was assessed by measuring the levels of tumor necrosis factor (TNF)-α, interleukin (IL)-1β, and IL-6 in bronchoalveolar lavage fluid (BALF). Theresults indicated that As-IV treatment remarkably ameliorated BLM-induced pulmonary fibrosis and attenuated BLM-induced oxidative stress and inflammation. Our findings indicate that As-IV-mediated suppression of fibroproliferation may contribute to the anti-fibrotic effect against BLM-induced pulmonary fibrosis. Its mechanisms of action are associated with inhibiting oxidative stress and inflammatory response. In summary, our study suggests a therapeutic potential of As-IV in the treatment of pulmonary fibrosis.

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