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http://dx.doi.org/10.4046/trd.2010.68.6.334

Moxifloxacin Ameliorates Oleic Acid-induced Acute Lung Injury by Modulation of Neutrophilic Oxidative Stress in Rats  

Kim, Byung-Yong (Department of Physiology, Daegu Catholic University School of Medicine)
Lee, Young-Man (Department of Physiology, Daegu Catholic University School of Medicine)
Publication Information
Tuberculosis and Respiratory Diseases / v.68, no.6, 2010 , pp. 334-344 More about this Journal
Abstract
Background: Based on the known immunoregulatory functions of moxifloxacin on phagocytes, the therapeutic effect of moxifloxacin on oleic acid (OA)-induced acute lung injury (ALI) was investigated. Methods: Moxifloxacin (10 mg/kg) was given to male Sprague-Dawley rats that had been given oleic acid (OA, $30{\mu}L$) intravenously. Five hours after OA injection, parameters demonstrating ALI were assessed to measure the effects of moxifloxacin on acute lung injury. Results: The pathological findings of OA-induced ALI's was diminished by moxifloxacin. Through ultrastructural and $CeCl_3$ EM histochemistry, moxifloxacin was confirmed to be effective in decreasing oxidative stress in the lung as well. Indices of ALI, such as lung weight/body weight ratio, protein content in bronchoalveolar lavage fluid, and lung myeloperoxidase were decreased by moxifloxacin. In diaminobenzidine immunohistochemistry, fluorescent immunohistochemistry, and Western blotting of the lung, moxifloxacin had decreased the enhanced expression of secretory phospholipase $A_2$ ($sPLA_2$) by OA. Conclusion: We concluded that moxifloxacin was effective in lessening acute inflammatory pulmonary edema caused by OA, by inhibiting the neutrophilic respiratory burst, which was initiated by the activation of $sPLA_2$.
Keywords
Acute Lung Injury; Neutrophils; Oleic Acid; Free Radicals; Phospholipases $A_2$; Secretory;
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