Up-regulation of long intergenic noncoding RNA 01296 in ovarian cancer impacts invasion, apoptosis and cell cycle distribution via regulating EMT.

Background: Recently, long intergenic non-coding RNA 01296 (LINC01296) has been demonstrated to regulate the initiation and progression of several cancers, but the functions of LINC01296 in ovarian cancer still remain unclear. The objective of our study was to determine the expression, biological roles, and clinical significance of LINC01296 in ovarian cancer.

Methods: LINC01296 expression was measured in ovarian cancer tissues or cell lines.

Transfection of Smac/DIABLO sensitizes drug-resistant tumor cells to TRAIL or paclitaxel-induced apoptosis in vitro.

Smac/DIABLO is a recently identified protein released from mitochondria in response to apoptotic stimuli and promotes apoptosis by antagonizing inhibitor of apoptosis proteins (IAPs). In this study, we observed depressed Smac/DIABLO and increased XIAP expression in ovarian epithelial tissues ordered by normal, benign and malignant epithelia. In epithelial ovarian cancer (EOC), the expression of Smac/DIABLO decreased with the malignancy.