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01-03-2010 | Original Article

Localization of HSP47 mRNA in murine bleomycin-induced pulmonary fibrosis

Authors: Tomoyuki Kakugawa, Hiroshi Mukae, Yoshitaka Hishikawa, Hiroshi Ishii, Noriho Sakamoto, Yuji Ishimatsu, Takeshi Fujii, Takehiko Koji, Shigeru Kohno

Published in: Virchows Archiv | Issue 3/2010

Abstract

Heat shock protein 47 (HSP47) is a collagen-specific molecular chaperone that has been shown to play a major role in the processing and/or secretion of procollagen. However, the knowledge on which cells are actually synthesizing HSP47 in the lung parenchyma in pulmonary fibrosis was only limited. The aim of the present study was to investigate the localization of HSP47 messenger ribonucleic acid (mRNA) in normal lung and in the lungs of mice in bleomycin-induced pulmonary fibrosis, using in situ hybridization. For the purpose, ICR mice were intravenously injected with 10 mg/kg per day of bleomycin for five consecutive days. The lung cells expressing HSP47 mRNA were identified in control (saline alone) and bleomycin-treated mice by in situ hybridization. The signal for HSP47 mRNA was markedly increased in bleomycin-treated lungs compared with that of controls. HSP47 mRNA was localized in α-smooth-muscle-actin-positive myofibroblasts, surfactant-protein-A-positive type II pneumocytes, and F4/80-positive macrophages in the active fibrotic areas. These results suggest that these cells may synthesize procollagen in the fibrotic process of bleomycin-treated lungs through upregulation of HSP47 mRNA and play an important role in fibrogenesis.

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Title: Localization of HSP47 mRNA in murine bleomycin-induced pulmonary fibrosis
Authors: Tomoyuki Kakugawa
Hiroshi Mukae
Yoshitaka Hishikawa
Hiroshi Ishii
Noriho Sakamoto
Yuji Ishimatsu
Takeshi Fujii
Takehiko Koji
Shigeru Kohno
Publication date: 01-03-2010
Publisher: Springer-Verlag
Published in: Virchows Archiv / Issue 3/2010
Print ISSN: 0945-6317
Electronic ISSN: 1432-2307
DOI: https://doi.org/10.1007/s00428-009-0876-x

At a glance: The STEP trials

Springer Medicine

Localization of HSP47 mRNA in murine bleomycin-induced pulmonary fibrosis

Abstract

At a glance: The STEP trials

Springer Medicine

Abstract

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