Puepose: To examine the expression difference of LINC 00478 in oral squamous cell carcinoma (OSCC) and analyze its relationship with the prognosis of OSCC patients. To investigate the effects of LINC 00478 on proliferation, migration, and invasion of OSCC cells, with the goal of offering a new potential approach for molecular detection and clinical diagnosis of OSCC.
Methods: Transcriptome data samples from OSCC were obtained from TCGA, and R software was utilized to assess the expression variance of LINC 00478 in OSCC tumor and normal tissues. Tissue samples from 26 OSCC patients, including cancer and adjacent tissues, were collected for RT-PCR analysis to determine the differential expression of LINC 00478 in OSCC tissues. In vitro experiments were conducted to explore the impact of LINC 00478 on proliferation, invasion, and migration of CAL27 cells. CCK-8 assay was used to observe the proliferation capability of LINC 00478 in CAL27 cells, while Transwell experiment was employed to assess its effects on cell migration and invasion. GraphPad Prism 8.0.2 software was used for statistical analysis of the data.
Results: Analysis of the TCGA database revealed that LINC 00478 was weakly expressed in OSCC tissues compared to adjacent normal tissues (P＜0.001), with high-expression LINC 00478 correlating with improved patient prognosis(P＜0.05). Furthermore, LINC 00478 was significantly under-expressed in 26 OSCC tissues (P＜0.001). Experimental data from CCK-8 assays indicated that upregulation of LINC 00478 suppressed CAL27 proliferation (P＜0.05). Additionally, Transwell experiments demonstrated that high-expression LINC 00478 significantly inhibited CAL27 migration and invasion (P＜0.05).
Conclusions: LINC 00478 is significantly under-expressed in OSCC, and its high expression is positively correlated with a better prognosis. Over-expression of the LINC 00478 gene has been shown to inhibit the proliferation, migration, and invasion of CAL27 cells, suggesting a potential role in inhibiting cancer progression in OSCC.