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Acute lung injury, a critical illness characterized by acute respiratory failure with bilateral pulmonary infiltrates, remains unresponsive to current treatments. The condition involves injury to the alveolar capillary barrier, neutrophil accumulation and the induction of proinflammatory cytokines followed by lung fibrosis. In the present study, a rabbit model of bleomycin-induced acute lung injury was established to examine the effects of asialoerythropoietin (AEP), an agent with tissue-protective activities, on pulmonary inflammation. Six Japanese white rabbits were randomly divided into two equal groups. Acute lung injury was induced in all rabbits by intratracheally injecting bleomycin. The control group was injected with bleomycin only; the experimental (AEP) group was injected intravenously with AEP (80 μg/kg) prior to the bleomycin injection. Computed tomography (CT) studies were performed seven days later. The CT inflammatory scores of areas exhibiting abnormal density and the pathological inflammatory scores were recorded as a ratio on a 7×7 mm grid. The CT and pathological inflammatory scores were significantly different between the control and AEP groups [122±10 and 16.3±1.5 (controls) vs. 71±8.5 and 9.7±1.4 (AEP), respectively; P&lt;0.01]. Thus, the present study revealed that AEP prevents bleomycin-induced acute lung injury in rabbits.

Asialoerythropoietin ameliorates bleomycin-induced acute lung injury in rabbits by reducing inflammation