Invasive colon cancer, but not non-invasive adenomas induce a gradient effect of Wnt pathway receptor frizzled 1 (Fz1) expression in the tumor microenvironment

Journal of Translational Medicine

Randall F Holcombe²  Mary Pat Moyer³  Anthony V Nguyen¹  Marina Planutiene²  Kestutis Planutis² 

[1] Division of Hematology/Oncology, University of California, Irvine, Irvine, California, USA;Division of Hematology/Oncology, Tisch Cancer Institute, Mount Sinai School of Medicine, New York, NY, USA;INCELL Corporation, San Antonio, Tx, USA

关键词: Wnt3a;    Fz receptors;    Tumor microenvironment;    Colon cancer;    Wnt signaling;   

Others  :  828018
DOI  :  10.1186/1479-5876-11-50

 received in 2012-10-01, accepted in 2013-02-20,  发布年份 2013

【 摘 要 】

Background

Wnt signaling in the colon cancer tumor microenvironment (TME) may affect cancer biologic properties including invasion and metastatic dissemination. Prior reports have suggested that the expression of select frizzled (Fz) receptors may be altered in cancers and in the TME.

Methods

Colon cancer, colonic adenoma and normal colonic mucosal specimens were obtained under institutional review board approval and analyzed for the expression of Fz1 and Fz2 by confocal fluorescent immunohistochemistry and Wnt-specific membrane array. In vitro, the effect of Wnt3a on Fz1 expression was examined in normal-derived NCM460 cells by qRT-PCR and immunohistochemistry.

Results

Fz1 was expressed in colon cancer and villous adenomas but not in more benign tubular adenomas. Fz1 expression was seen in normal colonic mucosa in close proximity to colon cancer, but not villous or tubular adenomas. Normal colonic mucosa distant from colon cancer did not express Fz1. Fz2 was expressed ubiquitously in cancer, adenomas and normal colonic mucosa. Fz1 expression was induced by Wnt3a in a normal colon mucosa-derived cell line in vitro.

Conclusions

Fz1 is a Wnt responsive gene in colon-derived tissues. Fz1 expression exhibited increased expression in normal mucosa only in close proximity to colon cancer. This field effect was not seen with pre-malignant adenomas and may be due to Wnt/β-catenin signaling within the TME. Fz1 may represent a new TME-directed therapeutic target for patients with colon cancer.

【 授权许可】

   
2013 Planutis et al; licensee BioMed Central Ltd.

【 图 表 】

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