Suberoylanilide hydroxamic acid: a potential epigenetic therapeutic agent for lung fibrosis?

Z. Wang, C. Chen, S.N. Finger, M.M. Kwajah, M. Jung, H. Schwarz, Nigel Swanson, Ricky Lareu, M. Raghunath

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    67 Citations (Scopus)


    Pulmonary fibrosis represents a fatal stage of interstitial lung diseases of known and idiopathic aetiology. No effective therapy is currently available. Based on an indication-discovery approach we present novel in vitro evidence that the histone deacetylases inhibitor suberoylanilide hydroxamic acid (SAHA), an FDA approved anti-cancer drug, has antifibrotic and anti-inflammatory potential.Human lung fibroblasts (fetal, adult and idiopathic adult pulmonary fibrosis) were treated with transforming growth factor (TGF)-β1 with or without SAHA. Collagen deposition, α-smooth muscle actin (α-SMA) expression, matrix metalloproteinase (MMP)1 activity, tissue inhibitor of MMP (TIMP)1 production, apoptosis and cell proliferation were assessed. Pro-inflammatory cytokines relevant to pulmonary fibrosis were assayed in SAHA-treated human peripheral blood mononuclear cells (PBMC) and its subpopulations.SAHA abrogated TGF-β1 effects on all the fibroblast lines by preventing their transdifferentiation into α-SMA positive myofibroblasts and increased collagen deposition without inducing apoptosis. However, MMP1 activity and TIMP1 production was modulated without a clear fibrolytic effect. SAHA also inhibited serum-induced proliferation of the fibroblast lines and caused hyperacetylation of α-tubulin and histone. Cytokine secretion was inhibited from PBMC and lymphocytes at nonapoptotic concentrations.Taken together, these data demonstrate combined antifibrotic and anti-inflammatory properties of SAHA, suggesting its therapeutic potential for pulmonary fibrosis.
    Original languageEnglish
    Pages (from-to)145-155
    JournalEuropean Respiratory Journal
    Issue number1
    Publication statusPublished - 2009


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