Long non-coding RNA (lncRNA) TTN antisense RNA 1 (TTN-AS1) was reported to be crucial modulators in the tumorigenesis of several types of cancers. However, it is unclear whether TTN-AS1 can regulate the progression of ovarian cancer (OC). The present study aimed to explore functional roles and molecular mechanism of TTN-AS1 in OC. Quantitative reverse transcriptase-polymerase chain reaction assay (qRT-PCR) was used to detect the expression of TTN-AS1 in OC tissues and cell lines. The biological function of TTN-AS1 in OC was identified by a series of in vitro and in vivo assays. Bioinformatics analysis and mechanism experiments were used to analyze and identify the molecular mechanism of TTN-AS1 in OC progression. A high level of TTN-AS1 was found in OC tissues and cell lines. High TTN-AS1 was positively associated with advanced FIGO stage, lymph node metastasis, and poorer overall survival of OC patients. Functionally, knockdown of TTN-AS1 inhibited cell proliferation, colony formation, invasion and migration of OC cells in vitro, and suppressed tumor formation in vivo. Mechanistically, TTN-AS1 functioned as a competing endogenous RNA by sponging microRNA-139-5p (miR-139-5p) to elevate Rho-associated coiled-coil containing protein kinase 2 (ROCK2). Downregulation of miR-139-5p or upregulation of ROCK2 partially rescued the inhibitory impact of TTN-AS1 knockdown on OC cells. These results obtained in the present study suggested that TTN-AS1 promoted the progression of OC by regulating the miR-139-5p/ROCK2 axis.Copyright © 2020 The Authors. Published by Elsevier Masson SAS.. All rights reserved.
Meeting Coverage
- ASCO – Lung CancerASCO.20 Virtual Scientific Program, held May 29 - 31, brought professionals from all over the world together to hear the brightest minds in oncology present state-of-the-art treatment modalities and new therapies.
- AACR-2020The American Association for Cancer Research is the world's oldest and largest professional association related to cancer research.
- ACC 2020The American College of Cardiology decided to cancel ACC.20/WCC due to COVID-19, which was scheduled to take place March 28-30 in Chicago. However, ACC.20/WCC Virtual Meeting continues to release cutting edge science and practice changing updates for cardiovascular professionals on demand and free through June 2020.
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ASCO 2019The 2019 ASCO Annual Meeting, taking place May 31-June 4 in Chicago, will bring together more than 32,000 oncology professionals from across the globe. The theme of this year’s conference is Caring for Every Patient, Learning From Every Patient.