Abstract
Background: LncRNAs have been corroborated to exert crucial effects in malignancies, including laryngeal squamous cell carcinoma (LSCC). Nevertheless, the role and mechanism of EPB41L4A- AS2 in LSCC are inadequately investigated and warrant further exploration.
Methods: Relevant database was adopted to analyze the relationship between EPB41L4A-AS2 expression level and tumors. The expressions and relationships of EPB41L4A-AS2, RE-1 silencing transcription factor (REST), miR-1254, and homeodomain interacting protein kinase 2 (HIPK2) in LSCC cells were evaluated by qRT-PCR, Pearson’s correlation tests, RNA immunoprecipitation, RNA pull-down assay, chromatin immunoprecipitation, database, and dual-luciferase reporter assay. Following the required transfection, the biological behaviors of LSCC cells were examined using cell function experiments. Meanwhile, the levels of Ki-67 and apoptosis-, and epithelial-mesenchymal transition (EMT) pathway-related proteins were quantified with Western blot. Moreover, xenografts in nude mice were constructed, and the tumor volume and weight were measured. Ki-67 positivity was determined by immunohistochemical staining.
Results: EPB41L4A-AS2 and HIPK2 were lower-expressed, yet miR-1254 and REST were higher- expressed in LSCC cells. Pearson’s correlation assay results exhibited a positive correlation between HIPK2 and EPB41L4A-AS2 and a negative correlation between HIPK2 and miR-1254. Overexpressed EPB41L4A-AS2 diminished the biological behavior, and repressed the levels of Ki-67 and EMT-related markers in LSCC cells whilst enhancing those of apoptosis-related markers. These aforementioned effects were counteracted by miR-1254 mimic. Moreover, EPB41L4A- AS2 overexpression suppressed the growth of tumors and reduced the positive expression of Ki-67 in nude mice. Besides, miR-1254 aggravated the biological behaviors and elevated the levels of Ki-67 and EMT-related proteins in LSCC cells while reducing the levels of apoptosis-related markers via targeting HIPK2.
Conclusion: REST-restrained EPB41L4A-AS2 modulates LSCC development via regulating miR-1254/HIPK2 pathway.
Graphical Abstract
[http://dx.doi.org/10.3322/CA.2007.0010] [PMID: 18287387]
[http://dx.doi.org/10.3322/caac.21492] [PMID: 30207593]
[http://dx.doi.org/10.1002/ijc.29890] [PMID: 26455822]
[http://dx.doi.org/10.1155/2014/507189] [PMID: 24672554]
[http://dx.doi.org/10.7150/jca.34016] [PMID: 31528209]
[http://dx.doi.org/10.1200/JCO.2013.53.5633] [PMID: 25154822]
[http://dx.doi.org/10.3322/caac.21386] [PMID: 27898173]
[http://dx.doi.org/10.1111/his.13456] [PMID: 29266325]
[http://dx.doi.org/10.1016/j.phrs.2016.05.018] [PMID: 27210721]
[http://dx.doi.org/10.1186/1741-7007-11-59] [PMID: 23721193]
[http://dx.doi.org/10.4161/epi.27030] [PMID: 24196393]
[http://dx.doi.org/10.1158/1078-0432.CCR-14-0706] [PMID: 25165097]
[http://dx.doi.org/10.1016/j.ygyno.2018.01.004] [PMID: 29310950]
[http://dx.doi.org/10.1038/s41419-020-2581-2] [PMID: 32555190]
[http://dx.doi.org/10.4149/neo_2018_170713N480] [PMID: 30249102]
[http://dx.doi.org/10.1186/s12885-019-5983-8] [PMID: 31391008]
[http://dx.doi.org/10.1038/bjc.2015.253] [PMID: 26158421]
[http://dx.doi.org/10.1002/jcb.28552] [PMID: 30868666]
[http://dx.doi.org/10.1113/EP087847] [PMID: 31645082]
[http://dx.doi.org/10.1186/s13046-019-1071-9] [PMID: 30728056]
[http://dx.doi.org/10.1111/jcmm.14611] [PMID: 31423730]
[http://dx.doi.org/10.1371/journal.pone.0031431] [PMID: 22363646]
[http://dx.doi.org/10.1186/s13046-019-1421-7] [PMID: 31623640]
[http://dx.doi.org/10.18632/oncotarget.8007] [PMID: 26980733]
[http://dx.doi.org/10.1186/s13046-019-1128-9] [PMID: 30971290]
[http://dx.doi.org/10.7150/ijbs.55557] [PMID: 34131399]
[http://dx.doi.org/10.1186/s12967-018-1418-6] [PMID: 29490660]
[http://dx.doi.org/10.1002/jcb.29701] [PMID: 32965043]
[http://dx.doi.org/10.1158/1535-7163.MCT-04-0228] [PMID: 15767543]
[http://dx.doi.org/10.1073/pnas.0809130106] [PMID: 19246391]
[http://dx.doi.org/10.3389/fncel.2019.00580] [PMID: 31998079]
[http://dx.doi.org/10.1016/j.exger.2020.110951] [PMID: 32305596]
[http://dx.doi.org/10.1038/ncb2976] [PMID: 24875735]
[http://dx.doi.org/10.1016/j.semcancer.2012.02.013] [PMID: 22406545]
[http://dx.doi.org/10.26355/eurrev_201803_14475] [PMID: 29565491]
[http://dx.doi.org/10.1007/978-1-4939-1661-0_1] [PMID: 25308257]
[http://dx.doi.org/10.15171/joddd.2015.047] [PMID: 26889365]
[http://dx.doi.org/10.1016/j.bbrc.2019.05.080] [PMID: 31178137]
[http://dx.doi.org/10.1016/j.biopha.2019.109222] [PMID: 31351424]
[http://dx.doi.org/10.1002/jcb.29404] [PMID: 31579977]
[http://dx.doi.org/10.1038/s41419-018-1262-x] [PMID: 30631050]
[http://dx.doi.org/10.1016/j.biopha.2017.05.116] [PMID: 28605875]
[http://dx.doi.org/10.1016/j.devcel.2006.09.009] [PMID: 17011485]
[http://dx.doi.org/10.1111/bjd.12989] [PMID: 24665835]
[http://dx.doi.org/10.1186/1756-9966-31-63] [PMID: 22889244]
[http://dx.doi.org/10.1371/journal.pone.0020665] [PMID: 21698151]
[http://dx.doi.org/10.1002/jcb.24842] [PMID: 24824041]
[http://dx.doi.org/10.1186/1471-2407-14-747] [PMID: 25282590]