Teduglutide is a long-acting synthetic analogue of human glucagon-like peptide-2 (GLP-2). GLP-2 regulates cell proliferation and apoptosis as well as normal physiology in the gastrointestinal tract. In the present study, possible cytoprotective and reparative effects of teduglutide were analyzed on a mouse model with lung injury induced by tumor necrosis factor-alpha (TNF-alpha) and actinomycin D (Act D). BALB/c mice were divided into six groups: control mice (I), mice injected intraperitoneally with 15 mu g/kg TNF-alpha (II), 800 mu g/kg Act D (III), Act D 2 min prior to TNF-alpha administration with the same doses (IV), mice injected subcutaneously with 200 mu g/kg teduglutide every 12 h for 10 consecutive days (V), and mice given Act D 2 min prior to TNF-alpha administration on day 11 after receiving teduglutide for 10 days (VI). The TNF-alpha/Act D administration made the lung a sensitive organ to damage. Mice lung subjected to TNF-alpha/Act D were characterized by the disruption of alveolar wall, induced pulmonary endothelial/epithelial cell apoptosis and expression of active caspase-3. These mice exhibited an increase in lipid peroxidation, glutathione levels, and activities of myeloperoxidase, superoxide dismutase, catalase, glutathione peroxidase and xanthine oxidase, as well as reduced tissue factor and sodium potassium/ATPase activities. Teduglutide pretreatment regressed the structural damage, cell apoptosis and oxidative stress by reducing lipid peroxidation in mice received TNF-alpha/Act D. GLP-2 receptors were present on the cell membrane of type II pneumocytes and interstitial cells. Thus, teduglutide can be suggested as a novel protective agent, which possesses anti-apoptotic and anti-oxidant properties, against lung injury. (C) 2012 Elsevier Inc. All rights reserved.