Identification of keratinocyte growth factor as a target of microRNA-155 in lung fibroblasts: implication in epithelial-mesenchymal interactions.

<h4>Background</h4>Epithelial-mesenchymal interactions are critical in regulating many aspects of vertebrate embryo development, and for the maintenance of homeostatic equilibrium in adult tissues. The interactions between epithelium and mesenchyme are believed to be mediated by paracrin...

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Autores principales: Nicolas Pottier, Thomas Maurin, Benoit Chevalier, Marie-Pierre Puisségur, Kevin Lebrigand, Karine Robbe-Sermesant, Thomas Bertero, Christian L Lino Cardenas, Elisabeth Courcot, Géraldine Rios, Sandra Fourre, Jean-Marc Lo-Guidice, Brice Marcet, Bruno Cardinaud, Pascal Barbry, Bernard Mari
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spelling oai:doaj.org-article:da634101c6334be0ac3b1a75d7b27ff82021-11-25T06:20:51ZIdentification of keratinocyte growth factor as a target of microRNA-155 in lung fibroblasts: implication in epithelial-mesenchymal interactions.1932-620310.1371/journal.pone.0006718https://doaj.org/article/da634101c6334be0ac3b1a75d7b27ff82009-08-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19701459/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Epithelial-mesenchymal interactions are critical in regulating many aspects of vertebrate embryo development, and for the maintenance of homeostatic equilibrium in adult tissues. The interactions between epithelium and mesenchyme are believed to be mediated by paracrine signals such as cytokines and extracellular matrix components secreted from fibroblasts that affect adjacent epithelia. In this study, we sought to identify the repertoire of microRNAs (miRNAs) in normal lung human fibroblasts and their potential regulation by the cytokines TNF-alpha, IL-1beta and TGF-beta.<h4>Methodology/principal findings</h4>MiR-155 was significantly induced by inflammatory cytokines TNF-alpha and IL-1beta while it was down-regulated by TGF-beta. Ectopic expression of miR-155 in human fibroblasts induced modulation of a large set of genes related to "cell to cell signalling", "cell morphology" and "cellular movement". This was consistent with an induction of caspase-3 activity and with an increase in cell migration in fibroblasts tranfected with miR-155. Using different miRNA bioinformatic target prediction tools, we found a specific enrichment for miR-155 predicted targets among the population of down-regulated transcripts. Among fibroblast-selective targets, one interesting hit was keratinocyte growth factor (KGF, FGF-7), a member of the fibroblast growth factor (FGF) family, which owns two potential binding sites for miR-155 in its 3'-UTR. Luciferase assays experimentally validated that miR-155 can efficiently target KGF 3'-UTR. Site-directed mutagenesis revealed that only one out of the 2 potential sites was truly functional. Functional in vitro assays experimentally validated that miR-155 can efficiently target KGF 3'-UTR. Furthermore, in vivo experiments using a mouse model of lung fibrosis showed that miR-155 expression level was correlated with the degree of lung fibrosis.<h4>Conclusions/significance</h4>Our results strongly suggest a physiological function of miR-155 in lung fibroblasts. Altogether, this study implicates this miRNA in the regulation by mesenchymal cells of surrounding lung epithelium, making it a potential key player during tissue injury.Nicolas PottierThomas MaurinBenoit ChevalierMarie-Pierre PuisségurKevin LebrigandKarine Robbe-SermesantThomas BerteroChristian L Lino CardenasElisabeth CourcotGéraldine RiosSandra FourreJean-Marc Lo-GuidiceBrice MarcetBruno CardinaudPascal BarbryBernard MariPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 4, Iss 8, p e6718 (2009)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Nicolas Pottier
Thomas Maurin
Benoit Chevalier
Marie-Pierre Puisségur
Kevin Lebrigand
Karine Robbe-Sermesant
Thomas Bertero
Christian L Lino Cardenas
Elisabeth Courcot
Géraldine Rios
Sandra Fourre
Jean-Marc Lo-Guidice
Brice Marcet
Bruno Cardinaud
Pascal Barbry
Bernard Mari
Identification of keratinocyte growth factor as a target of microRNA-155 in lung fibroblasts: implication in epithelial-mesenchymal interactions.
description <h4>Background</h4>Epithelial-mesenchymal interactions are critical in regulating many aspects of vertebrate embryo development, and for the maintenance of homeostatic equilibrium in adult tissues. The interactions between epithelium and mesenchyme are believed to be mediated by paracrine signals such as cytokines and extracellular matrix components secreted from fibroblasts that affect adjacent epithelia. In this study, we sought to identify the repertoire of microRNAs (miRNAs) in normal lung human fibroblasts and their potential regulation by the cytokines TNF-alpha, IL-1beta and TGF-beta.<h4>Methodology/principal findings</h4>MiR-155 was significantly induced by inflammatory cytokines TNF-alpha and IL-1beta while it was down-regulated by TGF-beta. Ectopic expression of miR-155 in human fibroblasts induced modulation of a large set of genes related to "cell to cell signalling", "cell morphology" and "cellular movement". This was consistent with an induction of caspase-3 activity and with an increase in cell migration in fibroblasts tranfected with miR-155. Using different miRNA bioinformatic target prediction tools, we found a specific enrichment for miR-155 predicted targets among the population of down-regulated transcripts. Among fibroblast-selective targets, one interesting hit was keratinocyte growth factor (KGF, FGF-7), a member of the fibroblast growth factor (FGF) family, which owns two potential binding sites for miR-155 in its 3'-UTR. Luciferase assays experimentally validated that miR-155 can efficiently target KGF 3'-UTR. Site-directed mutagenesis revealed that only one out of the 2 potential sites was truly functional. Functional in vitro assays experimentally validated that miR-155 can efficiently target KGF 3'-UTR. Furthermore, in vivo experiments using a mouse model of lung fibrosis showed that miR-155 expression level was correlated with the degree of lung fibrosis.<h4>Conclusions/significance</h4>Our results strongly suggest a physiological function of miR-155 in lung fibroblasts. Altogether, this study implicates this miRNA in the regulation by mesenchymal cells of surrounding lung epithelium, making it a potential key player during tissue injury.
format article
author Nicolas Pottier
Thomas Maurin
Benoit Chevalier
Marie-Pierre Puisségur
Kevin Lebrigand
Karine Robbe-Sermesant
Thomas Bertero
Christian L Lino Cardenas
Elisabeth Courcot
Géraldine Rios
Sandra Fourre
Jean-Marc Lo-Guidice
Brice Marcet
Bruno Cardinaud
Pascal Barbry
Bernard Mari
author_facet Nicolas Pottier
Thomas Maurin
Benoit Chevalier
Marie-Pierre Puisségur
Kevin Lebrigand
Karine Robbe-Sermesant
Thomas Bertero
Christian L Lino Cardenas
Elisabeth Courcot
Géraldine Rios
Sandra Fourre
Jean-Marc Lo-Guidice
Brice Marcet
Bruno Cardinaud
Pascal Barbry
Bernard Mari
author_sort Nicolas Pottier
title Identification of keratinocyte growth factor as a target of microRNA-155 in lung fibroblasts: implication in epithelial-mesenchymal interactions.
title_short Identification of keratinocyte growth factor as a target of microRNA-155 in lung fibroblasts: implication in epithelial-mesenchymal interactions.
title_full Identification of keratinocyte growth factor as a target of microRNA-155 in lung fibroblasts: implication in epithelial-mesenchymal interactions.
title_fullStr Identification of keratinocyte growth factor as a target of microRNA-155 in lung fibroblasts: implication in epithelial-mesenchymal interactions.
title_full_unstemmed Identification of keratinocyte growth factor as a target of microRNA-155 in lung fibroblasts: implication in epithelial-mesenchymal interactions.
title_sort identification of keratinocyte growth factor as a target of microrna-155 in lung fibroblasts: implication in epithelial-mesenchymal interactions.
publisher Public Library of Science (PLoS)
publishDate 2009
url https://doaj.org/article/da634101c6334be0ac3b1a75d7b27ff8
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