PMID- 34936289 OWN - NLM STAT- MEDLINE DCOM- 20220316 LR - 20220531 IS - 1045-4403 (Print) IS - 1045-4403 (Linking) VI - 31 IP - 6 DP - 2021 TI - CircRNA circSEPT9 Downregulates miR-10a through Methylation to Promote Cell Proliferation in Laryngeal Squamous Cell Carcinoma. PG - 17-22 LID - 10.1615/CritRevEukaryotGeneExpr.2021039092 [doi] AB - The oncogenic functions of circRNA circSEPT9 have been characterized in triple-negative breast cancer. We analyzed its role in laryngeal squamous cell carcinoma (LSCC). Quantitative reverse-transcription PCR (RT-qPCR) was used to analyze the expression of circSEPT9 and miR-10a in paired LSCC and nontumor tissues donated by 50 patients with LSCC. Methylation-specific PCR (MSP) was performed to analyze the role of circSEPT9 in miR-10a RNA gene methylation. circSEPT9 or miR-10a were overexpressed in LSCC cells to explore the interaction between them. The regulatory role of circSEPT9 and miR-10a in cell proliferation was studied with cell counting kit-8 (CCK-8) assay. CircSEPT9 was highly expressed in LSCC, whereas miR-10a was expressed at a lower level in LSCC. CircSEPT9 and miR-10a were closely correlated across LSCC tissue samples. In LSCC cells, circSEPT9 overexpression increased the methylation of the miR-10a gene and decreased the expression of miR-10a. CircSEPT9 overexpression increased LSCC cell proliferation, whereas miR-10a overexpression decreased cell proliferation. Co-transfection experiments showed that circSEPT9 overexpression attenuated the effects of miR-10a overexpression on cell proliferation. We conclude that circSEPT9 may increase miR-10a methylation to increase cell proliferation in LSCC. FAU - Zhu, Minhui AU - Zhu M AD - Department of Otorhinolaryngology - Head and Neck Surgery, Changhai Hospital, Naval Medical University, Shanghai, People's Republic of China. FAU - Liu, Chang AU - Liu C AD - Department of Otolaryngology, LongHua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China. FAU - Chen, Shicai AU - Chen S AD - Department of Otorhinolaryngology - Head and Neck Surgery, Changhai Hospital, Naval Medical University, Shanghai, People's Republic of China. FAU - Zhang, Caiyun AU - Zhang C AD - Department of Otorhinolaryngology - Head and Neck Surgery, Changhai Hospital, Naval Medical University, Shanghai, People's Republic of China. FAU - Zhou, Peng AU - Zhou P AD - Department of Otorhinolaryngology - Head and Neck Surgery, Changhai Hospital, Naval Medical University, Shanghai, People's Republic of China. FAU - Sun, Jianxiong AU - Sun J AD - Department of Otorhinolaryngology - Head and Neck Surgery, Changhai Hospital, Naval Medical University, Shanghai, People's Republic of China. FAU - Zheng, Hongliang AU - Zheng H AD - Department of Otorhinolaryngology - Head and Neck Surgery, Changhai Hospital, Naval Medical University, Shanghai, 200433, PR. China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Crit Rev Eukaryot Gene Expr JT - Critical reviews in eukaryotic gene expression JID - 9007261 RN - 0 (MIRN10 microRNA, human) RN - 0 (MicroRNAs) RN - 0 (RNA, Circular) SB - IM MH - Cell Line, Tumor MH - Cell Proliferation/genetics MH - Gene Expression Regulation, Neoplastic MH - *Head and Neck Neoplasms/genetics MH - Humans MH - *Laryngeal Neoplasms/genetics/metabolism/pathology MH - Methylation MH - *MicroRNAs/genetics/metabolism MH - RNA, Circular/genetics MH - *Squamous Cell Carcinoma of Head and Neck/genetics EDAT- 2021/12/23 06:00 MHDA- 2022/03/17 06:00 CRDT- 2021/12/22 13:09 PHST- 2021/12/22 13:09 [entrez] PHST- 2021/12/23 06:00 [pubmed] PHST- 2022/03/17 06:00 [medline] AID - 61e879f84b23b688,2a656a64408c286c [pii] AID - 10.1615/CritRevEukaryotGeneExpr.2021039092 [doi] PST - ppublish SO - Crit Rev Eukaryot Gene Expr. 2021;31(6):17-22. doi: 10.1615/CritRevEukaryotGeneExpr.2021039092.