Abstract
AbstractWe have investigated the role of cytokine lymphotoxin in tumour–stromal interactions in human ovarian cancer. We found that lymphotoxin overexpression is commonly shared by the cancer cells of various ovarian cancer subtypes, and lymphotoxin‐beta receptor (LTBR) is expressed ubiquitously in both the cancer cells and cancer‐associated fibroblasts (CAFs). In monoculture, we showed that ovarian cancer cells are not the major lymphotoxin‐responsive cells. On the other hand, our co‐culture studies demonstrated that the cancer cell‐derived lymphotoxin induces chemokine expression in stromal fibroblasts through LTBR–NF‐κB signalling. Amongst the chemokines being produced, we found that fibroblast‐secreted CXCL11 promotes proliferation and migration of ovarian cancer cells via the chemokine receptor CXCR3. CXCL11 is highly expressed in CAFs in ovarian cancer biopsies, while CXCR3 is found in malignant cells in primary ovarian tumours. Additionally, the overexpression of CXCR3 is significantly associated with the tumour grade and lymph node metastasis of ovarian cancer, further supporting the role of CXCR3, which interacts with CXCL11, in promoting growth and metastasis of human ovarian cancer. Taken together, these results demonstrated that cancer‐cell‐derived lymphotoxin mediates reciprocal tumour–stromal interactions in human ovarian cancer by inducing CXCL11 in fibroblasts. Our findings suggest that lymphotoxin–LTBR and CXCL11–CXCR3 signalling represent therapeutic targets in ovarian cancer. Copyright © 2013 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Cited By
61
Frontiers in Immunology
Metrics
61
Citations
44
References
Details
Published
Dec 06, 2013
Vol/Issue
232(1)
Pages
43-56
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Cite This Article
Tat‐San Lau, Tony Kwok‐Hung Chung, Tak‐Hong Cheung, et al. (2013). Cancer cell‐derived lymphotoxin mediates reciprocal tumour–stromal interactions in human ovarian cancer by inducing CXCL11 in fibroblasts. The Journal of Pathology, 232(1), 43-56. https://doi.org/10.1002/path.4258
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