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IL-13 Promotes Collagen Accumulation in Crohn’s Disease Fibrosis by Down-Regulation of Fibroblast MMP Synthesis: A Role for Innate Lymphoid Cells?
BACKGROUND: Fibrosis is a serious consequence of Crohn’s disease (CD), often necessitating surgical resection. We examined the hypothesis that IL-13 may promote collagen accumulation within the CD muscle microenvironment. METHODS: Factors potentially modulating collagen deposition were examined in i...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Public Library of Science
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3534115/ https://www.ncbi.nlm.nih.gov/pubmed/23300643 http://dx.doi.org/10.1371/journal.pone.0052332 |
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author | Bailey, Jennifer R. Bland, Paul W. Tarlton, John F. Peters, Iain Moorghen, Moganaden Sylvester, Paul A. Probert, Christopher S. J. Whiting, Christine V. |
author_facet | Bailey, Jennifer R. Bland, Paul W. Tarlton, John F. Peters, Iain Moorghen, Moganaden Sylvester, Paul A. Probert, Christopher S. J. Whiting, Christine V. |
author_sort | Bailey, Jennifer R. |
collection | PubMed |
description | BACKGROUND: Fibrosis is a serious consequence of Crohn’s disease (CD), often necessitating surgical resection. We examined the hypothesis that IL-13 may promote collagen accumulation within the CD muscle microenvironment. METHODS: Factors potentially modulating collagen deposition were examined in intestinal tissue samples from fibrotic (f) CD and compared with cancer control (C), ulcerative colitis (UC) and uninvolved (u) CD. Mechanisms attributable to IL-13 were analysed using cell lines derived from uninvolved muscle tissue and tissue explants. RESULTS: In fCD muscle extracts, collagen synthesis was significantly increased compared to other groups, but MMP-2 was not co-ordinately increased. IL-13 transcripts were highest in fCD muscle compared to muscle from other groups. IL-13 receptor (R) α1 was expressed by intestinal muscle smooth muscle, nerve and KIR(+) cells. Fibroblasts from intestinal muscle expressed Rα1, phosphorylated STAT6 in response to IL-13, and subsequently down-regulated MMP-2 and TNF-α-induced MMP-1 and MMP-9 synthesis. Cells with the phenotype KIR(+)CD45(+)CD56(+/−)CD3(−) were significantly increased in fCD muscle compared to all other groups, expressed Rα1 and membrane IL-13, and transcribed high levels of IL-13. In explanted CD muscle, these cells did not phosphorylate STAT6 in response to exogenous IL-13. CONCLUSIONS: The data indicate that in fibrotic intestinal muscle of Crohn’s patients, the IL-13 pathway is stimulated, involving a novel population of infiltrating IL-13Rα1(+), KIR(+) innate lymphoid cells, producing IL-13 which inhibits fibroblast MMP synthesis. Consequently, matrix degradation is down-regulated and this leads to excessive collagen deposition. |
format | Online Article Text |
id | pubmed-3534115 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-35341152013-01-08 IL-13 Promotes Collagen Accumulation in Crohn’s Disease Fibrosis by Down-Regulation of Fibroblast MMP Synthesis: A Role for Innate Lymphoid Cells? Bailey, Jennifer R. Bland, Paul W. Tarlton, John F. Peters, Iain Moorghen, Moganaden Sylvester, Paul A. Probert, Christopher S. J. Whiting, Christine V. PLoS One Research Article BACKGROUND: Fibrosis is a serious consequence of Crohn’s disease (CD), often necessitating surgical resection. We examined the hypothesis that IL-13 may promote collagen accumulation within the CD muscle microenvironment. METHODS: Factors potentially modulating collagen deposition were examined in intestinal tissue samples from fibrotic (f) CD and compared with cancer control (C), ulcerative colitis (UC) and uninvolved (u) CD. Mechanisms attributable to IL-13 were analysed using cell lines derived from uninvolved muscle tissue and tissue explants. RESULTS: In fCD muscle extracts, collagen synthesis was significantly increased compared to other groups, but MMP-2 was not co-ordinately increased. IL-13 transcripts were highest in fCD muscle compared to muscle from other groups. IL-13 receptor (R) α1 was expressed by intestinal muscle smooth muscle, nerve and KIR(+) cells. Fibroblasts from intestinal muscle expressed Rα1, phosphorylated STAT6 in response to IL-13, and subsequently down-regulated MMP-2 and TNF-α-induced MMP-1 and MMP-9 synthesis. Cells with the phenotype KIR(+)CD45(+)CD56(+/−)CD3(−) were significantly increased in fCD muscle compared to all other groups, expressed Rα1 and membrane IL-13, and transcribed high levels of IL-13. In explanted CD muscle, these cells did not phosphorylate STAT6 in response to exogenous IL-13. CONCLUSIONS: The data indicate that in fibrotic intestinal muscle of Crohn’s patients, the IL-13 pathway is stimulated, involving a novel population of infiltrating IL-13Rα1(+), KIR(+) innate lymphoid cells, producing IL-13 which inhibits fibroblast MMP synthesis. Consequently, matrix degradation is down-regulated and this leads to excessive collagen deposition. Public Library of Science 2012-12-31 /pmc/articles/PMC3534115/ /pubmed/23300643 http://dx.doi.org/10.1371/journal.pone.0052332 Text en © 2012 Bailey et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Bailey, Jennifer R. Bland, Paul W. Tarlton, John F. Peters, Iain Moorghen, Moganaden Sylvester, Paul A. Probert, Christopher S. J. Whiting, Christine V. IL-13 Promotes Collagen Accumulation in Crohn’s Disease Fibrosis by Down-Regulation of Fibroblast MMP Synthesis: A Role for Innate Lymphoid Cells? |
title | IL-13 Promotes Collagen Accumulation in Crohn’s Disease Fibrosis by Down-Regulation of Fibroblast MMP Synthesis: A Role for Innate Lymphoid Cells? |
title_full | IL-13 Promotes Collagen Accumulation in Crohn’s Disease Fibrosis by Down-Regulation of Fibroblast MMP Synthesis: A Role for Innate Lymphoid Cells? |
title_fullStr | IL-13 Promotes Collagen Accumulation in Crohn’s Disease Fibrosis by Down-Regulation of Fibroblast MMP Synthesis: A Role for Innate Lymphoid Cells? |
title_full_unstemmed | IL-13 Promotes Collagen Accumulation in Crohn’s Disease Fibrosis by Down-Regulation of Fibroblast MMP Synthesis: A Role for Innate Lymphoid Cells? |
title_short | IL-13 Promotes Collagen Accumulation in Crohn’s Disease Fibrosis by Down-Regulation of Fibroblast MMP Synthesis: A Role for Innate Lymphoid Cells? |
title_sort | il-13 promotes collagen accumulation in crohn’s disease fibrosis by down-regulation of fibroblast mmp synthesis: a role for innate lymphoid cells? |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3534115/ https://www.ncbi.nlm.nih.gov/pubmed/23300643 http://dx.doi.org/10.1371/journal.pone.0052332 |
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