LncRNA XLOC_006390 facilitates cervical cancer tumorigenesis and metastasis as a ceRNA against miR-331-3p and miR-338-3p

• Published in: Journal of gynecologic oncology Vol. 29; no. 6; pp. e95 - 17
• Main Authors: Luan, Xiaotian, Wang, Yankui
• Format: Journal Article
• Language: English
• Published: Korea (South) Asian Society of Gynecologic Oncology; Korean Society of Gynecologic Oncology 01.11.2018; 대한부인종양학회
• Subjects: Base Sequence; Carcinogenesis - genetics; Cell Line, Tumor; Down-Regulation; Female; Gene Expression Regulation, Neoplastic; Humans; MicroRNAs - antagonists & inhibitors; MicroRNAs - genetics; Neoplasm Metastasis - genetics; Original; RNA, Long Noncoding - genetics; RNA, Long Noncoding - physiology; Transfection; Uterine Cervical Neoplasms - genetics; Uterine Cervical Neoplasms - metabolism; Uterine Cervical Neoplasms - pathology; 산부인과학; microRNAs; Metastasis; Cervical Cancer; Long Non-Coding RNA
• ISSN: 2005-0380; 2005-0399
• DOI: 10.3802/jgo.2018.29.e95

Cervical cancer is one of the most common malignant tumors. Our previous results showed that long non-coding RNA (lncRNA) XLOC_006390 plays an important role in cervical cancer. In this study, we have explored the mechanism of action of lncRNA XLOC_006390. LncRNA XLOC_006390 was proposed to exercise its function as a competing endogenous RNA (ceRNA), and its potential targeted miRNAs was predicted through the database LncBase Predicted v.2. Two miRNAs, miR-331-3p, and miR-338-3p, were chosen for the study. Expression of miRNAs and lncRNA in cervical cancer cells and tissues was detected by reverse transcription polymerase chain reaction. To determine the correlation, silencing of XLOC_006390, over-expression of miR-331-3p, and miR-338-3p was performed in SiHa and Caski cell lines, respectively. Based on the interactive effect between miRNA and lncRNA, miR-331-3p and miR-338-3p were significantly downregulated in cervical cancer cells and tissues, and their expression levels were negatively related to that of lncRNA. Our results also showed that the expression of miR-331-3p target gene , miR-338-3p target genes , was significantly downregulated when the XLOC_006390 was knocked down. Further, XLOC_006390 was found to facilitate cervical cancer tumorigenesis and metastasis by downregulating miR-331-3p and miR-338-3p expression. Taken together, our study demonstrated that XLOC_006390 may serve as a ceRNA and reversely regulates the expression of miR-331-3p and miR-338-3p, thus facilitating cervical cancer tumorigenesis and metastasis.