alexa Hepatocyte growth factor may act as a pulmotrophic factor on lung regeneration after acute lung injury.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Molecular Biomarkers & Diagnosis

Author(s): Yanagita K, Matsumoto K, Sekiguchi K, Ishibashi H, Niho Y,

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Abstract Hepatocyte growth factor (HGF) has been shown to have hepatotrophic and renotropic functions for regeneration of the liver and kidney through its mitogenic, motogenic, and morphogenic properties. To examine the involvement of HGF in lung regeneration after acute injury, we analyzed changes of HGF mRNA, HGF activity, and HGF receptors in the rat lung after lung insult and measured HGF concentration in sera of patients with various lung diseases. Following the onset of acute lung injury induced by intratracheal hydrochloride injection, a compensatory DNA synthesis occurred in the bronchial epithelium with a peak at 24 h and in the alveolar epithelium with a peak at 48 h. Expression of HGF mRNA in the rat lung remarkably increased only 3 h after the treatment and HGF activity in the lung also increased to about 3-fold at 6 h later. HGF receptors in the lung but not in the other noninjured organs were down-regulated 12 h later. These marked increases in HGF mRNA and HGF activity and the concomitant down-regulation of HGF receptor occurred before the marked compensatory DNA synthesis in bronchial and alveolar epithelial cells. HGF concentration in sera of patients with various lung diseases, as measured by radioimmunoassay, was much higher than that in healthy donors. These results suggest that HGF is newly produced in the lung after acute lung injury and may have a role in regeneration of the lung.
This article was published in J Biol Chem and referenced in Journal of Molecular Biomarkers & Diagnosis

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