LINC01857 Exacerbates the Malignant Behaviors of Endometrial Carcinoma Cells by Sponging miR-19b-3p and Recruiting ELAVL1 to Upregulate MYCN

Objectives: Long intergenic nonprotein coding RNA 1857 (LINC01857) has been identified to play an oncogenic role in different cancers. Nevertheless, its expression and biological role in endometrial carcinoma (EC) are not clear. Design: This study was a basic research on cell biology. Materials, Setting, Methods: EC cell lines were used in this study. RNA expressions in EC cells were examined through RT-qPCR. The impacts of LINC01857 silence on EC cell proliferation, apoptosis, migration, and invasion were evaluated through functional assays, and the underlying regulatory mechanism at a molecular level was analyzed via mechanism assays. Results: LINC01857 expression was aberrantly high in EC cells. LINC01857 silence inhibited EC cell proliferation, migration, and invasion and promoted EC cell apoptosis. Mechanically, LINC01857 acted as a sponge of miR-19b-3p. Upregulation of miR-19b-3p hampered EC cell malignant behaviors. MYCN proto-oncogene, bHLH transcription factor (MYCN) was the target gene of miR-19b-3p, and MYCN depletion repressed the malignant behaviors of EC cells. Further, LINC01857 was verified to recruit ELAV-like RNA-binding protein 1 (ELAVL1) to stabilize MYCN mRNA. Limitations: The function of LINC01857 in EC remains to be further investigated with clinical samples and more cell lines involved. Conclusions: LINC01857 exacerbated EC cell malignant behaviors via the miR-19b-3p/ELAVL1/MYCN axis.