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Tumor-induced lymphangiogenesis, a major conduit for cancer cell dissemination from the primary tumor site to lymph nodes and beyond, eventually leads to metastasis in cancer patients. Given the recent evidence revealing that the suppression of ELK3 inhibits the metastasis of triple-negative breast cancer cells, we aimed to study the underlying mechanism of impaired metastasis in ELK3-suppressed MDA-MB-231 cells (ELK3 KD) with regard to lymphangiogenesis. We found that the secretome of ELK3 KD cells inhibited tube formation, whereas it promoted the migration and invasion of lymphatic endothelial cells (LECs) in vitro. In vivo analysis revealed that peritumoral lymphatic vessels were not developed around the xenografted tumors of ELK3 KD. We further revealed that the suppression of NF-κB signaling in ELK3 KD was the primary cause of the reduced VEGFC expression. Taken together, we suggest that ELK3 is an upstream regulator of the NF-κB signaling pathway, the inhibition of which leads to the suppression of peritumoral lymphatic vessel development, possibly due to a low VEGFC expression. Copyright © 2017. Published by Elsevier Inc.

Citation

Nuri Oh, Ji-In Park, Ji-Hoon Park, Kwang-Soo Kim, Dong Ryul Lee, Kyung-Soon Park. The role of ELK3 to regulate peritumoral lymphangiogenesis and VEGF-C production in triple negative breast cancer cells. Biochemical and biophysical research communications. 2017 Mar 18;484(4):896-902

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PMID: 28188790

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