Journal
CANCER LETTERS
Volume 370, Issue 1, Pages 100-107Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.canlet.2015.10.018
Keywords
Bone marrow-derived mesenchymal stem cells (BM-MSCs); Tumor invasion; Chemokine receptor type 4 (CXCR4); Novel CXCR4 inhibitor
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Funding
- IG Associazione Italiana per la Ricerca sul Cancro [13192]
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Recent findings suggest that bone marrow-derived mesenchymal stem cells (BM-MSCs) are recruited into the microenvironment of developing tumors, where they contribute to metastatic processes. The aim of this study was to investigate the role of BM-MSCs in promoting osteosarcoma and hepatocellular carcinoma cell progression in vitro and the possible mechanisms involved in these processes. U2OS and SNU-398 are osteosarcoma and hepatocellular carcinoma cell lines, respectively, that can be induced to proliferate when cultured in the presence of BM-MSCs. To determine the effect of BM-MSCs on U2OS and SNU-398 cells, the ART and ERR signaling pathways were investigated, and increases were observed in active P-Akt and P-Erk forms. Moreover, BM-MSCs caused an increase in tumor cell migration and invasion that was derived from the enhancement of CXCR4 levels. Thus, when tumor cells were treated with the CXCR4 antagonist AMD3100, a reduction in their migration and invasion was observed. Furthermore, a new CXCR4 inhibitor, Peptide R, which was recently developed as an anticancer agent, was used to inhibit BM-MSC-mediated tumor invasion and to overcome AMD3100 toxicity. Taken together, these results suggest that inhibiting CXCR4 impairs the crosstalk between tumor cells and BM-MSCs, resulting in reduced metastatic potential in osteosarcoma and hepatocellular carcinoma cells. (C) 2015 Elsevier Ireland Ltd. All rights reserved.
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