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Current Protein & Peptide Science

Editor-in-Chief

ISSN (Print): 1389-2037
ISSN (Online): 1875-5550

Research Article

REST-restrained lncRNA EPB41L4A-AS2 Modulates Laryngeal Squamous Cell Carcinoma Development via Regulating miR-1254/HIPK2 Pathway

Author(s): Huijun Yang*, Gang Yu, Yan Wang and Xing Guo

Volume 24, Issue 9, 2023

Published on: 12 September, 2023

Page: [737 - 757] Pages: 21

DOI: 10.2174/1389203724666230803094028

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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

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