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MicroRNA-204 Inhibits the Growth and Motility of Colorectal Cancer Cells by Downregulation of CXCL8

Feng Shuai*, Bo Wang, Shuxiao Dong

* Department of Gastroenterology, East Medical District of Linyi People’s Hospital, Linyi, Shandong, P.R. China
† Department of Pediatrics, Chinese Medicine Hospital in Linyi City, Linyi, Shandong, P.R. China
‡ Department of Gastrointestinal Surgery, Linyi People’s Hospital, Linyi, Shandong, P.R. China

Oncology Research 2018, 26(8), 1295-1305. https://doi.org/10.3727/096504018X15172747209020

Abstract

Among all of the miRNAs, miR-204 has gained considerable attention in the field of cancer research. This study aimed to reveal the detailed functions and the underlying mechanism of miR-204 in colorectal cancer (CRC) cells. The expressions of miR-204 in CRC tumor tissues and cell lines were monitored. Expressions of miR-204 and CXCL8 in Caco-2 and HT-29 cells were altered by transfection, and then cell viability, apoptosis, migration, invasion, EMT-related protein expression, and PI3K/AKT/mTOR pathway protein expression were assessed. We found that miR-204 was expressed at low levels in CRC tumor tissues and cell lines when compared to their normal controls. miR-204 overexpression reduced the viability, migration, and invasion of Caco-2 and HT-29 cells while significantly inducing apoptosis. miR-204 overexpression upregulated E-cadherin expression and downregulated N-cadherin and vimentin expressions. CXCL8 was a target of miR-204, and miR-204 suppression could not increase cell viability, migration, invasion, and EMT procedure when CXCL8 was silenced. Moreover, miR-204 overexpression decreased the phosphorylated levels of PI3K, AKT, and mTOR. The increased phosphorylations of PI3K, AKT, and mTOR, and the upregulation of CXCL8 induced by miR-204 suppression were all abolished by the addition of LY294002 and AZD8055 (inhibitors of PI3K/AKT and mTOR, respectively). To conclude, we demonstrated a tumor-suppressive miRNA in CRC cell lines, miR-204, which is poorly expressed in CRC tissues and cell lines. miR-204 exerted antigrowth, antimigration, anti-invasion, and anti-EMT activities, which might be via deactivating the PI3K/AKT/mTOR pathway and repressing CXCL8 expression.

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Cite This Article

APA Style
Shuai, F., Wang, B., Dong, S. (2018). Microrna-204 inhibits the growth and motility of colorectal cancer cells by downregulation of CXCL8. Oncology Research, 26(8), 1295-1305. https://doi.org/10.3727/096504018X15172747209020
Vancouver Style
Shuai F, Wang B, Dong S. Microrna-204 inhibits the growth and motility of colorectal cancer cells by downregulation of CXCL8. Oncol Res. 2018;26(8):1295-1305 https://doi.org/10.3727/096504018X15172747209020
IEEE Style
F. Shuai, B. Wang, and S. Dong "MicroRNA-204 Inhibits the Growth and Motility of Colorectal Cancer Cells by Downregulation of CXCL8," Oncol. Res., vol. 26, no. 8, pp. 1295-1305. 2018. https://doi.org/10.3727/096504018X15172747209020



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