Crucial involvement of the CCL3-CCR5 axis-mediated fibroblast accumulation in colitis-associated carcinogenesis in mice
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Patients with inflammatory bowel diseases often develop colon carcinoma. Combined treatment of azoxymethane (AOM) and dextran sulfate sodium (DSS) recapitulates colitis-associated cancer in mice. AOM/DSS-induced tumor formation was reduced in CCL3- or its specific receptor, CCR5-deficient mice despite the presence of a massive infiltration of inflammatory cells. However, AOM/DSS-induced type I collagen-positive fibroblast accumulation in the colon was reduced in CCL3- or CCR5-deficient mice. This was associated with depressed expression of heparin-binding epidermal growth factor-like growth factor (HB-EGF), which is expressed mainly by fibroblasts. Moreover in vitro, CCL3 induced fibroblasts to proliferate and to enhance HB-EGF expression. Furthermore, CCR5 blockade reduced tumor formation together with reduced fibroblast accumulation and HB-EGF expression, even when administered after the development of multiple colon tumors. Thus, CCL3-CCR5-mediated fibroblast accumulation may be required, in addition to leukocyte infiltration, to induce full-blown colitis-associated carcinogenesis. Our studies shed light on a therapeutic potential of CCR5 antagonist for patients with colitis-associated cancer. What's new? Inflammation of the bowel can lead to cancer, in some cases. By learning how one leads to the other, researchers hope to find a way to stave off this progression. Previously, it's been observed that these cancers have a lot of chemokine CCL3 hanging around. In this paper, the authors replicated these colitis-induced cancers in mice and investigated what CCL3 was doing. They learned that CCL3 and its receptor, CCR5, gather up cancer-associated fibroblasts, which promote transformation and tumor growth. Leukocyte infiltration wasn't enough, they found; without CCL3 and CCL5 bringing in fibroblasts, the tumor development slowed. © 2014 UICC.
収録刊行物
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- International Journal of Cancer
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International Journal of Cancer 135 (6), 1297-1306, 2014-09-15
Wiley-Liss
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詳細情報 詳細情報について
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- CRID
- 1050001335984123904
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- NII論文ID
- 120005463351
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- NII書誌ID
- AA11621537
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- ISSN
- 10970215
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- Web Site
- http://hdl.handle.net/2297/39054
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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- IRDB
- CiNii Articles