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K Hisatomi, H Mukae, N Sakamoto, Y Ishimatsu, T Kakugawa, S Hara, H Fujita, S Nakamichi, H Oku, Y Urata, H Kubota, K Nagata and S Kohno
Abstract
Pirfenidone is a novel anti-fibrotic and anti-inflammatory agent that inhibits the progression of fibrosis in animal models and in patients with idiopathic pulmonary fibrosis (IPF). We previously showed that pirfenidone inhibits the over-expression of collagen type I and of heat shock protein (HSP) 47, a collagen-specific molecular chaperone, in human lung fibroblasts stimulated with transforming growth factor (TGF)-β1 in vitro. The increased numbers of HSP47-positive type II pneumocytes as well as fibroblasts were also diminished by pirfenidone in an animal model of pulmonary fibrosis induced by bleomycin. The present study evaluates the effects of pirfenidone on collagen type I and HSP47 expression in the human alveolar epithelial cell line, A549 cells in vitro.
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Concepts
Cell, Fibrosis, Chaperone, Lung, Protein, Heat shock protein, Collagen, Idiopathic pulmonary fibrosis
MeSH headings
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