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Hong, Chang‐Soo; Sun, Eun‐Gene; Choi, Ji‐Na; Kim, Dae‐Hwan; Kim, Jo‐Heon; Ryu, Kyung‐Hyun; Shim, Hyun‐Jeong; Hwang, Jun‐Eul; Bae, Woo‐Kyun; Kim, Hyeong‐Rok; Kim, Kyung Keun; Jung, Chaeyong; Chung, Ik‐Joo; Cho, Sang‐Hee
Cancer science, September 2020, Letnik: 111, Številka: 9Journal Article
Fibroblast growth factor receptor 4 (FGFR4) is known to induce cancer cell proliferation, invasion, and antiapoptosis through activation of RAS/RAF/ERK and PI3K/AKT pathways, which are also known as major molecular bases of colon cancer carcinogenesis related with epidermal growth factor receptor (EGFR) signaling. However, the interaction between FGFR4 and EGFR signaling in regard to colon cancer progression is unclear. Here, we investigated a potential cross‐talk between FGFR4 and EGFR, and the effect of anti‐EGFR therapy in colon cancer treatment. To explore the biological roles of FGFR4 in cancer progression, RNA sequencing was carried out using FGFR4 transfected colon cell lines. Gene ontology data showed the upregulation of genes related to EGFR signaling, and we identified that FGFR4 overexpression secretes EGFR ligands such as amphiregulin (AREG) with consequent activation of EGFR and ErbB3. This result was also shown in in vivo study and the cooperative interaction between EGFR and FGFR4 promoted tumor growth. In addition, FGFR4 overexpression reduced cetuximab‐induced cytotoxicity and the combination of FGFR4 inhibitor (BLU9931) and cetuximab showed profound antitumor effect compared to cetuximab alone. Clinically, we found the positive correlation between FGFR4 and AREG expression in tumor tissue, but not in normal tissue, from colon cancer patients and these expressions were significantly correlated with poor overall survival in patients treated with cetuximab. Therefore, our results provide the novel mechanism of FGFR4 in connection with EGFR activation and the combination of FGFR4 inhibitor and cetuximab could be a promising therapeutic option to achieve the optimal response to anti‐EGFR therapy in colon cancer. Our study has characterized the cross‐talk between fibroblast growth factor receptor 4 (FGFR4) and epidermal growth factor receptor (EGFR)/ErbB3 signaling by the contribution of EGFR ligands secreted from FGFR4. These findings provide experimental evidence for combined treatment with FGFR4 inhibitor and anti‐EGFR therapy in colon cancer.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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