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Pullamsetti, S.S.* ; Savai, R.* ; Dumitrascu, R.* ; Dahal, B.K.* ; Wilhelm, J.* ; Königshoff, M. ; Zakrzewicz, D.* ; Ghofrani, H.A.* ; Weissmann, N.* ; Eickelberg, O. ; Guenther, A.* ; Leiper, J.* ; Seeger, W.* ; Grimminger, F.* ; Schermuly, R.T.*

The role of dimethylarginine dimethylaminohydrolase in idiopathic pulmonary fibrosis.

Sci. Transl. Med. 3:87ra53 (2011)
DOI PMC
Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
Idiopathic pulmonary fibrosis (IPF) is a progressive, dysregulated response to alveolar injury that culminates in compromised lung function from excess extracellular matrix production. Associated with high morbidity and mortality, IPF is generally refractory to current pharmacological therapies. We examined fibrotic lungs from mice and from patients with IPF and detected increased expression of dimethylarginine dimethylaminohydrolases (DDAHs)--key enzymes that metabolize asymmetric dimethylarginine (ADMA), which is an endogenous inhibitor of nitric oxide synthase, to form l-citrulline and dimethylamine. DDAHs are up-regulated in primary alveolar epithelial type II cells from these mice and patients where they are colocalized with inducible nitric oxide synthase. In cultured alveolar epithelial type II cells from bleomycin-induced fibrotic mouse lungs, inhibition of DDAH suppressed proliferation and induced apoptosis in an ADMA-dependent manner. In addition, DDAH inhibition reduced collagen production by fibroblasts in an ADMA-independent but transforming growth factor/SMAD-dependent manner. In mice with bleomycin-induced pulmonary fibrosis, the DDAH inhibitor L-291 reduced collagen deposition and normalized lung function. In bleomycin-induced fibrosis, inducible nitric oxide synthase inhibition decreased fibrosis, but an even stronger reduction was observed after inhibition of DDAH. Thus, DDAH inhibition reduces fibroblast-induced collagen deposition in an ADMA-independent manner and reduces abnormal epithelial proliferation in an ADMA-dependent manner, offering a possible therapeutic avenue for attenuation of pulmonary fibrosis.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Korrespondenzautor
Schlagwörter nitric-oxide synthesis; placebo-controlled trial; asymmetric dimethylarginine; endothelial-cells; wound repair; bleomycin; mechanisms; expression; synthase; pathway
ISSN (print) / ISBN 1946-6234
e-ISSN 1946-6242
Quellenangaben Band: 3, Heft: 87, Seiten: , Artikelnummer: 87ra53 Supplement: ,
Verlag American Association for the Advancement of Science (AAAS)
Verlagsort Washington, DC, USA
Nichtpatentliteratur Publikationen
Begutachtungsstatus Peer reviewed