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- W2550652885 abstract "Dendritic cells (DC) have been found to accumulate in lungs of patients with idiopathic pulmonary fibrosis, localized in lymphoid follicles together with activated T and B cells. However, their pathogenetic relevance in pulmonary fibrosis is poorly defined. We here found that mice exposed to adenoviral gene transfer of biologically active TGF-β1 (AdTGF-β1) to trigger pulmonary fibrosis responded with significantly increased accumulation particularly of CD11bpos DC, but also CD103pos DC in their lung tissue, compared to control mice. Gene expression profiling of sorted lung DC subsets from AdTGF-β1 versus control vector exposed mice revealed CD11b DC much more than CD103 DC to express markers of extracellular matrix (ECM) turnover such as MMP-2 and -7 as well as tissue inhibitors of MMPs, suggesting particularly lung CD11b DC to contribute to regulation of ECM deposition. Diphtheria toxin treatment of AdTGF-β1 exposed chimeric zDC+/DTR mice, leading to selective depletion of DCs while sparing macrophages, led to significantly reduced numbers of lung DC accompanied by progressive lung fibrosis in mice. Moreover, FMS-like tyrosine kinase-3 ligand (Flt3L) KO mice characterized by congenital lack of major lung DC subsets responded to AdTGF-β1 exposure with progressive lung fibrosis in the absence of lung DC accumulation, relative to WT mice. Together, the data show that i) pulmonary fibrosis is characterized by increased accumulation of DC subsets in lung tissue of mice, and that ii) selective depletion of lung DCs in diphtheria toxin-dependent and –independent model systems aggravates pulmonary fibrosis, thereby suggesting a regulatory role of lung DCs in pulmonary fibrogenesis." @default.
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- W2550652885 date "2016-09-01" @default.
- W2550652885 modified "2023-09-27" @default.
- W2550652885 title "Role of dendritic cells in pulmonary fibrosis in mice" @default.
- W2550652885 doi "https://doi.org/10.1183/13993003.congress-2016.pa3891" @default.
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