PMID- 35261819 OWN - NLM STAT- MEDLINE DCOM- 20230110 LR - 20230111 IS - 2167-8359 (Print) IS - 2167-8359 (Electronic) IS - 2167-8359 (Linking) VI - 10 DP - 2022 TI - LncRNA CCAT1 facilitates the proliferation, invasion and migration of human laryngeal squamous cell carcinoma cells via the miR-218-5p/BMI1. PG - e12961 LID - 10.7717/peerj.12961 [doi] LID - e12961 AB - Long non-coding RNAs (LncRNAs) are vital in the treatment of laryngeal squamous cell carcinoma (LSCC). This study estimated the mechanism of lncRNA CCAT1 (CCAT1) in LSCC cells. The expression of CCAT1 in the human laryngeal mucosal epithelial cells (HLCs) and LSCC cells (Hep-2 and TU177) was detected. CCK-8 and Transwell assays were used to evaluate the cell proliferative, migrative, and invasive abilities, respectively. The subcellular localization of CCAT1 was verified by RNA-FISH and cytoplasmic isolation assays. The targeted relationship among CCAT1, miR-218-5p, and BMI1 was verified by dual-luciferase assay. Expressions of miR-218-5p and BMI1 were detected by RT-qPCR. Our results depicted that CCAT1 was highly-expressed in Hep-2 and TU177 cells. Silencing CCAT1 inhibited the proliferation, migration, and invasion of Hep-2 and TU177 cells. Mechanically, CCAT1 regulated the BMI1 expression by competitively binding to miR-218-5p as a competing endogenous RNA (ceRNA), and thus facilitated the growth of Hep-2 and TU177 cells. Downregulation of miR-218-5p or upregulation of BMI1 inhibited the inhibitory effect of silencing CCAT1 on Hep-2 and TU177 cell proliferation, invasion, and migration. In conclusion, our study elicited that lncRNA CCAT1 facilitated the proliferation, migration, and invasion of Hep-2 and TU177 cells by sponging miR-218-5p and regulating the downstream BMI1. CI - (c) 2022 Hong et al. FAU - Hong, Jing AU - Hong J AD - Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang, China. FAU - Hong, Ali AU - Hong A AD - Jiangxi University of Traditional Chinese Medicine, Nanchang, China. FAU - Tu, Houshu AU - Tu H AD - Nanchang Angel Maternity Hospital, Nanchang, China. FAU - Wan, Zhichao AU - Wan Z AD - Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang, China. FAU - Deng, Yuqiao AU - Deng Y AD - Jiangxi University of Traditional Chinese Medicine, Nanchang, China. FAU - Deng, Chengcheng AU - Deng C AD - Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang, China. FAU - Tao, Bo AU - Tao B AD - Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang, China. FAU - Yu, Yanjin AU - Yu Y AD - Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang, China. FAU - Zhou, Lanfei AU - Zhou L AD - Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang, China. LA - eng PT - Journal Article DEP - 20220303 PL - United States TA - PeerJ JT - PeerJ JID - 101603425 RN - 0 (RNA, Long Noncoding) RN - 0 (MicroRNAs) RN - 0 (BMI1 protein, human) RN - EC 2.3.2.27 (Polycomb Repressive Complex 1) RN - 0 (MIRN218 microRNA, human) MH - Humans MH - *RNA, Long Noncoding/genetics MH - Squamous Cell Carcinoma of Head and Neck/genetics MH - *MicroRNAs/genetics MH - Cell Line, Tumor MH - Cell Proliferation/genetics MH - *Head and Neck Neoplasms MH - Polycomb Repressive Complex 1/genetics PMC - PMC8898548 OTO - NOTNLM OT - BMI1 OT - Competing endogenous RNA OT - Invasion OT - Laryngeal squamous cell carcinoma OT - LncRNA CCAT1 OT - Migration OT - Proliferation OT - miR-218-5p COIS- The authors declare that they have no competing interests. EDAT- 2022/03/10 06:00 MHDA- 2022/03/10 06:01 PMCR- 2022/03/03 CRDT- 2022/03/09 08:44 PHST- 2021/09/16 00:00 [received] PHST- 2022/01/27 00:00 [accepted] PHST- 2022/03/09 08:44 [entrez] PHST- 2022/03/10 06:00 [pubmed] PHST- 2022/03/10 06:01 [medline] PHST- 2022/03/03 00:00 [pmc-release] AID - 12961 [pii] AID - 10.7717/peerj.12961 [doi] PST - epublish SO - PeerJ. 2022 Mar 3;10:e12961. doi: 10.7717/peerj.12961. eCollection 2022.