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Background:   LBX2 antisense RNA 1 (LBX2-AS1), a long noncoding RNA, has been identified to be closely associated with the progression of various cancers. However, the role of LBX2-AS1 in colorectal cancer (CRC) is still poorly understood. In this study, we aimed to investigate the expression and function of LBX2-AS1 in CRC.Material and Methods:   Expression data from the Gene Expression Omnibus (GEO) and Gene Expression Profiling Interactive Analysis (GEPIA) databases and results obtained from clinical samples/patients were used to determine the correlation between LBX2-AS1 expression and pathological stages, overall survival (OS). Furthermore, knockdown of LBX2-AS1 in CRC cells using the short interfering RNA (siRNA) technique, and observed its biological functions using western blotting, quantitative reverse transcription-polymerase chain reaction (qRT-PCR), cell counting kit-8 (CCK-8) and flow cytometry assay in the CRC cell line.Results:   Our study demonstrated that the expression levels of LBX2-AS1 were higher in CRC cell lines than in normal colon mucosal cell lines. Bioinformatics analysis revealed that CRC patients with high LBX2-AS1 expression levels had poor OS. Furthermore, knockdown of LBX2-AS1 in CRC cells could attenuate the proliferative ability of CRC cells in vitro, which is associated with decreased expression of cyclin-dependent kinase (CDK) 3, CDK6, and CCND1 and enhanced expression of cyclin-dependent kinase inhibitor 1A.Conclusions:   LBX2-AS1 plays a crucial role in the tumorigenesis of CRC, providing a potential therapeutic target for CRC patients.

Overexpression of Long Noncoding RNA LBX2-AS1 Promotes the Proliferation of Colorectal Cancer