LncRNA LOXL1-AS1 promotes ovarian cancer progression by enhanced BRIP1 mRNA stability.

Long non-coding RNAs (lncRNAs) have crucial effects on the development of malignant tumors. This work focused on determining how LOXL1-AS1 contributed to epithelial ovarian cancer development. As indicated by quantitative RT-polymerase chain reaction (qRT-PCR), LOXL1-AS1 showed significant overexpression within ovarian epithelial cancer tissues and ovarian cancer cells compared with non-cancer samples and regular human epithelial cell lines. According to CCK-8, flow cytometry, plate cloning, cell scratch test, a series of cell function tests in vitro, a nude mouse transplanted tumor model, and Western blot assays, LOXL1-AS1 siRNA transfection suppressed the growth, invasion, and epithelial-to-mesenchymal transformation characteristics of SKOV3 and A2780 cells in vitro and vivo. As discovered, LOXL1-AS1 targets BRCA1-interacting protein C-terminal helicase 1 (BRIP1) mRNA, resulting in a malignant phenotype of ovarian cancer. Overexpression of BRIP1 reversed the inhibition of cell progression induced by LOXL1-AS1 siRNA. In addition, based on RNA stability experiments, LOXL1-AS1 enhanced ovarian cancer cell growth and metastasis by stabilizing BRIP1 mRNA. Our findings reveal a novel mechanism of how LOXL1-AS1 enhances epithelial ovarian cancer progression by specifically regulating BRIP1 mRNA stability. This provides the potential therapeutic application of LOXL1-AS1 targeting BRIP1 for treating ovarian cancer.