LINC00324 facilitates cell proliferation through competing for miR­214­5p in immature ovarian teratocarcinoma.

Immature ovarian teratocarcinoma (IOT) is a rare and malignant type of ovarian teratoma, and the molecular mechanisms underlying the pathogenesis and malignant phenotype of IOT remain uncharacterized. The present study examined a long non­coding RNA (lncRNA), long­chain intergenic non­coding RNA324 (LINC00324), which may serve a crucial role in pathogenesis of IOT. According to the results, LINC00324 was upregulated in IOT tissues and cells, as determined by reverse transcription­quantitative PCR, and its depletion impaired cell proliferation ability and improved cell apoptosis ability in IOT. Furthermore, LINC00324 acted as a miR­214­5p sponge to derepress cyclin dependent kinase 6 (CDK6), cyclin D1 (CCND1), murine double minute homolog 2 (MDM2), and mouse double minute 4 (MDM4) expression, thus increasing IOT cell proliferation and repressing apoptosis. Taken together, these results demonstrated that LINC00324 could serve as a competing endogenous RNA to facilitate IOT cell proliferation by regulation of miR­214­5p­CDK6/CCND1/MDM2/MDM4 network, which possibly provide a novel therapeutic target for IOT.