Abstract
This study combined with bioinformatics analysis and investigated the expression pattern of miR-181b-5p, as well as explored its role and mechanism in cholangiocarcinoma (CCA or CHOL). Several bioinformatics databases were used to analyze the expression of miR-181b and the enrichment of miR-181b in biological activities and biological pathways in CCA. The RT-qPCR analysis was used to examine the expression levels of miR-181b-5p. A receiver operation characteristics (ROC) curve analysis and the Kaplan–Meier survival assay were conducted to validate the diagnostic and prognostic implication of miR-181b-5p. Cell experiments were used to explore the possible functional role of miR-181b-5p in CCA progression. The bioinformatics assay was used to predict the target gene of miR-181b-5p and Western blot was used to confirm the related signaling pathway. The bioinformatics analysis results suggest that miR-181b-5p was highly expressed in cholangiocarcinoma and its expression was negatively related to PARK2 expression in CCA tissues. miR-181b-5p expression in the serum and tissues was upregulated and associated with lymph node metastasis and TNM stage. Increased expression of miR-181b-5p had relatively high diagnostic accuracy and showed poor prognosis in CCA patients. In addition, miR-181b-5p overexpression enhanced cell proliferation, migration, and invasion by targeting PARK2. Overexpression of miR-181b-5p activated the PI3K/AKT signaling pathway, while knockdown of miR-181b-5p suppressed the signaling pathway. Increased expression of miR-181b-5p in CCA may be a potential diagnostic or/and prognostic indicator for CCA patients. The present data indicated miR-181b-5p acted as an oncogene in CCA through promoting tumor cell proliferation, migration, and invasion of CCA via the PTEN/PI3K/AKT signaling pathway by targeting PARK2, which might be a promising therapeutic target or biomarker for CCA.
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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Funding
This study was supported by the 900 Hospital Innovation Team Construction Special Funding (No. 2018Q06) for Zhe-long Jiang and (No. 2018J02) for He-jun Yang, The Key Project of Natural Science Foundation of Fujian Province (No. 2019Y0068) for Li-zhi Lv, and the Fujian Natural Science Foundation (Youth Innovation) Project (No. 2020J05299) for Rui-Sheng Ke; Xiamen Medical and Health Guiding Project Fund Project (No. 3502Z20209011) for Rui-Sheng Ke.
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Rui-Sheng Ke and Zhe-Long Jiang wrote the manuscript. Fu-Xing Zhang, He-Jun Yang, Li-Zhi Lv, and Yi Jiang contributed to the final manuscript. Zhe-Long Jiang, Li-Zhi Lv, and Rui-Sheng Ke verified and discussed the studies. Hong-Liang Zhan revised the manuscript. Rui-Sheng Ke, Fu-Xing Zhang, Si-Yu Zhang, Zhao-Hui Liu, and Yi Jiang participated in data analysis and interpretation. Li-Zhi Lv, Rui-Sheng Ke, Zhe-Long Jiang, and Yi Jiang edited and proofread the manuscript. Rui-sheng Ke and Li-zhi Lv supervised the study. All the authors approved final manuscript.
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Jiang, ZL., Zhang, FX., Zhan, HL. et al. miR-181b-5p Promotes the Progression of Cholangiocarcinoma by Targeting PARK2 via PTEN/PI3K/AKT Signaling Pathway. Biochem Genet 60, 223–240 (2022). https://doi.org/10.1007/s10528-021-10084-5
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DOI: https://doi.org/10.1007/s10528-021-10084-5