Publication date: 28 March 2017
Source:Cancer Letters, Volume 389
Author(s): Elena Farmaki, Vimala Kaza, Athanasios G. Papavassiliou, Ioulia Chatzistamou, Hippokratis Kiaris
The induction of localized pro-inflammatory niches in the periphery is instrumental in metastasis. In order to better understand how tumors engage distal sites and activate a pro-inflammatory response we utilized syngeneic breast cancers as a model and showed that soluble factors from the neoplastic epithelium activate the expression of the monocyte chemoattractive protein (MCP) chemokines of the mouse 11C cluster that include Ccl1, Ccl2, Ccl7, Ccl8, Ccl11 and Ccl12. Tissues such as the lungs and the brain, that are more prone to colonization by breast cancer cells, were more sensitive to MCP cluster chemokine induction than others such as the liver. Subsequent analyses involving chemokine arrays in breast cancer cells and media followed by functional validation assays in in vitro and in vivo identified the cytokine Ccl3 as the principle mediator of the communication between the neoplastic epithelium and the peripheral tissues in terms of MCP cluster chemokine induction. Our results show that MCP chemokines are activated in peripheral tissues of breast cancer-bearing mice, by a mechanism that involves breast cancer cell-derived Ccl3. Interference with the expression of cancer cell-derived Ccl3 may find application in the management of breast cancer metastases.
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