| Autor: |
Kenta Kawahara, Masashi Nagata, Ryoji Yoshida, Akiyuki Hirosue, Takuya Tanaka, Yuichiro Matsuoka, Hidetaka Arita, Hikaru Nakashima, Junki Sakata, Keisuke Yamana, Sho Kawaguchi, Shunsuke Gohara, Yuka Nagao, Masatoshi Hirayama, Nozomu Takahashi, Mayumi Hirayama, Hideki Nakayama |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Biochemistry and Biophysics Reports, Vol 28, Iss , Pp 101114- (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2405-5808 |
| DOI: |
10.1016/j.bbrep.2021.101114 |
| Popis: |
We aimed to determine the functional role of the miRNA, which affects drug sensitivity to 5-FU in oral squamous cell carcinoma (OSCC), using two types of 5-FU-resistant and parental OSCC cell lines. MiRNA microarray data showed that miR-30a was significantly upregulated in two resistant cell lines. Therefore, we investigated the effects and molecular mechanism of miR-30a on 5-FU sensitivity. Stable overexpression of miR-30a in parental OSCC cells decreased cell proliferation and attenuated drug sensitivity to 5-FU. Cell cycle analysis indicated that miR-30a overexpression increased the proportion of G1 phase cells and decreased the proportion of S phase cells. MiR-30a knockdown using siRNA reversed the effects of miR-30a overexpression. DNA microarray analysis using miR-30a-overexpressing cell lines and a TargetScan database search showed that cyclin E2 (CCNE2) is a target of miR-30a. A luciferase reporter assay confirmed that a miR-30a mimic interacted with the specific binding site in the 3' UTR of CCNE2. CCNE2 knockdown with siRNA in OSCC cells yielded decreased drug sensitivity to 5-FU, similar to miR-30a overexpressing cells. These findings suggest that miR-30a in OSCC may be a novel biomarker of 5-FU-resistant tumors, as well as a therapeutic target for combating resistance. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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