lanatoside-c and Pulmonary-Fibrosis

It has been established that lanatoside C, a FDA-approved cardiac glycoside, reduces proliferation of cancer cell lines. The proliferation of fibroblasts is critical to the pathogenesis of pulmonary fibrosis (PF), a progressive and fatal fibrotic lung disease lacking effective treatment. In this study we have investigated the impact of lanatoside C on a bleomycin (BLM)-induced mouse model of PF and through the evaluation of fibroblast proliferation and activation in vitro. We evaluated explanted lung tissue by histological staining, western blot analysis, qRT-PCR and survival analysis, demonstrating that lanatoside C was able to protect mice against BLM-induced pulmonary fibrosis. The proliferation of cultured pulmonary fibroblasts isolated from BLM-induced PF mice was suppressed by lanatoside C, as hypothesized, through the induction of cell apoptosis and cell cycle arrest at the G2/M phase. The Akt signalling pathway was involved in this process. Interestingly, the production of α-SMA, fibronectin, and collagen I and III in response to TGF-β1 in healthy mouse fibroblasts was suppressed following lanatoside C administration by inhibition of TGF-β1/Smad signalling. In addition, TGF-β1-induced migration in lung fibroblasts was also impeded after lanatoside C treatment. Together, our data revealed that lanatoside C alleviated BLM-induced pulmonary fibrosis in mice via attenuation of growth and differentiation of fibroblasts, suggesting that it has potential as a candidate therapy for PF patients.

Topics: Animals; Apoptosis; Bleomycin; Cell Cycle Checkpoints; Cell Differentiation; Cell Proliferation; Cyclin D1; Cyclin E; Cytoprotection; Down-Regulation; Fibroblasts; Forkhead Box Protein O1; Lanatosides; Male; Mice; Mice, Inbred C57BL; Phosphorylation; Proto-Oncogene Proteins c-akt; Proto-Oncogene Proteins c-bcl-2; Pulmonary Fibrosis; Signal Transduction; Smad Proteins; Transforming Growth Factor beta

Topics: Adolescent; Angina Pectoris; Arrhythmias, Cardiac; Atrial Fibrillation; Child; Coronary Disease; Deslanoside; Geriatrics; Heart Block; Heart Failure; Humans; Hypertension; Lanatosides; Myocardial Infarction; Pharmacology; Pulmonary Edema; Pulmonary Fibrosis; Pulmonary Heart Disease; Tachycardia; Thrombophlebitis; Toxicology; Water-Electrolyte Balance