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. 2021 Feb;21(1):121-128.
doi: 10.1007/s10238-020-00655-y. Epub 2020 Aug 20.

Overexpression of miR-27a predicts poor prognosis and promotes the progression in cholangiocarcinoma

Yunxia Liu  1 , Xia Liu  2 , Yanhua Zhou  3 , Tingting Liu  4 , Jie Li  4
Affiliations

Overexpression of miR-27a predicts poor prognosis and promotes the progression in cholangiocarcinoma

Yunxia Liu et al. Clin Exp Med. 2021 Feb.

Abstract

The function of microRNA-27a (miR-27a) expression in cholangiocarcinoma (CCA) remains largely unclear; therefore, this study aimed to investigate the clinical significance and functional role of miR-27a in CCA. This study included 117 paired CCA tissues and adjacent normal tissues from CCA patients who received surgical resection. Reverse transcription-quantitative polymerase chain reaction was used to measure the expression levels of miR-27a in CCA tissues and cell lines. A Kaplan-Meier curve and Cox regression analysis were used to determine overall prognostic performance. The effects of miR-27a on cell proliferation, migration, and invasion were measured by CCK-8 and Transwell assays. The expression levels of miR-27a in patients with CCA and cell lines were higher than those in adjacent normal tissues and normal cells, respectively. Additionally, miR-27a levels were found to be associated with lymph node metastasis and TNM stages. The overall survival time of CCA patients with high miR-27a expression was poorer than that of those with low miR-27a expression. Furthermore, miR-27a overexpression promoted CCA cell proliferation, migration, and invasion, whereas knockdown of miR-27a suppressed cell proliferation, migration, and invasion. Taken together, these results suggest the potential usefulness of miR-27a in the prognosis and progression of CCA.

Keywords: Cholangiocarcinoma; Invasion; MicroRNA-27a; Migration; Prognosis; Proliferation.

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