FOXM1-induced upregulation of lncRNA OR3A4 promotes the progression of diffuse large B-cell lymphoma via Wnt/β-catenin signaling pathway.

Diffuse large B-cell lymphoma (DLBCL) is a leading cause of non-Hodgkin lymphomas. Existing researches have verified that long non-coding RNAs (lncRNAs) play crucial roles in the development of DLBCL, nevertheless, whether lncRNA OR3A4 has influences on the progression of DCBCL needs further exploration. In our study, it was revealed that the expression of OR3A4 was upregulated in DLBCL tumors and cell lines, and patients with high OR3A4 expression suffered from poor prognosis. Knockdown of OR3A4 suppressed cell proliferation and promoted cell apoptosis in DLBCL. Moreover, knockdown of OR3A4 inactivated Wnt/β-catenin signaling pathway, and Riluzole treatment could partially rescue the inhibitive effect of OR3A4 silencing on DLBCL cell proliferation. Furthermore, FOXM1 expression was discovered to be upregulated in DLBCL tissues, and it positively modulated the expression of OR3A4 at transcriptional leve. It was also revealed that FOXM1 knockdown inactivated Wnt/β-catenin signaling pathway. Finally, rescue assays confirmed that OR3A4 overexpression or the treatment of Riluzole could partially countervail the inhibitive effect of FOXM1 silencing on DLBCL progression. Taken together, FOXM1-induced upregulation of OR3A4 enhances the occurrence of DLBCL via Wnt/β-catenin signaling pathway.