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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Adrenomedullin in inflammatory process associated with experimental pulmonary fibrosis.

ABSTRACT: BACKGROUND: Adrenomedullin (AM), a 52-amino acid ringed-structure peptide with C-terminal amidation, was originally isolated from human pheochromocytoma. AM are widely distributed in various tissues and acts as a local vasoactive hormone in various conditions. METHODS: In the present study, we investigated the efficacy of AM on the animal model of bleomycin (BLM)-induced lung injury. Mice were subjected to intratracheal administration of BLM and were assigned to receive AM daily by an intraperitoneal injection of 200 ngr/kg. RESULTS AND DISCUSSION: Myeloperoxidase activity, lung histology, immunohistochemical analyses for cytokines and adhesion molecules expression, inducible nitric oxide synthase (iNOS), nitrotyrosine, and poly (ADP-ribose) polymerase (PARP) were performed one week after fibrosis induction. Lung histology and transforming growth factor beta (TGF-β) were performed 14 and 21 days after treatments. After bleomycin administration, AM-treated mice exhibited a reduced degree of lung damage and inflammation compared with BLM-treated mice, as shown by the reduction of (1) myeloperoxidase activity (MPO), (2) cytokines and adhesion molecules expression, (3) nitric oxide synthase expression, (4) the nitration of tyrosine residues, (5) poly (ADP-ribose) (PAR) formation, a product of the nuclear enzyme poly (ADP-ribose) polymerase (PARP) (6) transforming growth factor beta (TGF-β) (7)and the degree of lung injury. CONCLUSIONS: Our results indicate that AM administration is able to prevent bleomycin induced lung injury through the down regulation of proinflammatory factors.[1]


  1. Adrenomedullin in inflammatory process associated with experimental pulmonary fibrosis. Di Paola, R., Talero, E., Galuppo, M., Mazzon, E., Bramanti, P., Motilva, V., Cuzzocrea, S. Respir. Res. (2011) [Pubmed]
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