PMID- 33880596 OWN - NLM STAT- MEDLINE DCOM- 20211018 LR - 20211018 IS - 1791-3004 (Electronic) IS - 1791-2997 (Print) IS - 1791-2997 (Linking) VI - 23 IP - 6 DP - 2021 Jun TI - Knockdown of lncRNA DLEU1 inhibits the tumorigenesis of oral squamous cell carcinoma via regulation of miR‑149‑5p/CDK6 axis. LID - 447 [pii] LID - 10.3892/mmr.2021.12086 [doi] AB - Oral squamous cell carcinoma (OSCC) is a frequent malignant tumor worldwide. Long non‑coding RNAs (lncRNAs) are known to play key roles in different types of cancer, including OSCC. It was previously reported that lncRNA deleted in lymphocytic leukemia 1 (DLEU1) is notably upregulated in OSCC; however, the role of DLEU1 in OSCC remains unclear. Gene and protein expression levels in OSCC cells were detected by reverse transcription‑quantitative PCR and western blotting, respectively, in the present study. A Transwell assay was performed to measure cell migration and invasion. Flow cytometry was used to detect cell apoptosis, and the dual‑luciferase reporter assay was applied to confirm the interaction between DLEU1, microRNA (miR)‑149‑5p and CDK6 in OSCC cells. DLEU1 expression was negatively associated with the survival rate of patients with OSCC. In addition, silencing of DLEU1 notably inhibited the proliferation of OSCC cells by inducing apoptosis. Meanwhile, DLEU1 directly bound to miR‑149‑5p, and CDK6 was found to be the direct target of miR‑149‑5p. Furthermore, DLEU1 knockdown‑induced inhibition of OSCC cell proliferation was significantly reversed by the miR‑149‑5p antagomir. Knockdown of lncRNA DLEU1 reversed the proliferation of OSCC cells via regulation of the miR‑149‑5p/CDK6 axis. Thus, DLEU1 may serve as a novel target for treating OSCC. FAU - Lv, Tianzhu AU - Lv T AD - Department of Emergency General, The Affiliated Stomatological Hospital of Guizhou Medical University, Guiyang, Guizhou 550025, P.R. China. FAU - Liu, Hongjing AU - Liu H AD - Department of Emergency General, The Affiliated Stomatological Hospital of Guizhou Medical University, Guiyang, Guizhou 550025, P.R. China. FAU - Wu, Yadong AU - Wu Y AD - Department of Oral and Maxillofacial Surgery, The Affiliated Stomatological Hospital of Guizhou Medical University, Guiyang, Guizhou 550025, P.R. China. FAU - Huang, Wentao AU - Huang W AD - Department of Basic Stomatology, School of Savaid Stomatology, Hangzhou Medical College, Hangzhou, Zhejiang 310053, P.R. China. LA - eng PT - Journal Article DEP - 20210421 PL - Greece TA - Mol Med Rep JT - Molecular medicine reports JID - 101475259 RN - 0 (DLEU1 lncRNA, human) RN - 0 (MIRN149 microRNA, human) RN - 0 (MicroRNAs) RN - 0 (RNA, Long Noncoding) RN - EC 2.7.11.22 (CDK6 protein, human) RN - EC 2.7.11.22 (Cyclin-Dependent Kinase 6) SB - IM MH - Apoptosis MH - Carcinogenesis/*drug effects/*genetics MH - Carcinoma, Squamous Cell/*drug therapy/pathology MH - Cell Line, Tumor MH - Cell Movement MH - Cell Transformation, Neoplastic/genetics MH - China MH - Cyclin-Dependent Kinase 6/genetics/*metabolism MH - Female MH - Gene Expression Regulation, Neoplastic MH - Gene Knockdown Techniques MH - Humans MH - Male MH - MicroRNAs/genetics/*metabolism MH - Middle Aged MH - Mouth Neoplasms/*drug therapy/pathology MH - RNA, Long Noncoding/*genetics/*pharmacology PMC - PMC8060799 OTO - NOTNLM OT - oral squamous cell carcinoma OT - deleted in lymphocytic leukemia 1 OT - microRNA‑149‑5p OT - cyclin dependent kinase 6 COIS- The authors declare that they have no competing interests. EDAT- 2021/04/22 06:00 MHDA- 2021/10/21 06:00 PMCR- 2021/04/13 CRDT- 2021/04/21 06:51 PHST- 2020/09/23 00:00 [received] PHST- 2021/02/03 00:00 [accepted] PHST- 2021/04/21 06:51 [entrez] PHST- 2021/04/22 06:00 [pubmed] PHST- 2021/10/21 06:00 [medline] PHST- 2021/04/13 00:00 [pmc-release] AID - 447 [pii] AID - MMR-0-0-12086 [pii] AID - 10.3892/mmr.2021.12086 [doi] PST - ppublish SO - Mol Med Rep. 2021 Jun;23(6):447. doi: 10.3892/mmr.2021.12086. Epub 2021 Apr 21.