COL3A1 Overexpression Associates with Poor Prognosis and Cisplatin Resistance in Lung Cancer

Background: Collagen type III alpha 1 chain (COL3A1) is reported to mediate drug resistance in various cancers, and public database analysis indicated its overexpression in lung cancer. Aims: To investigate the effects of COL3A1 on modulating cisplatin (DDP) resistance in lung carcinoma. Study Design: A cell study. Methods: Gene Expression Omnibus datasets were used to determine the differentially expressed genes between H460 and H460/DDP cell lines using bioinformatics analysis. COL3A1 expression and its clinical value in lung cancer prognosis were analyzed using GEPIA and UALCAN databases. Its roles in modulating the growth, viability, apoptosis, and drug resistance were also assessed in vitro. Results: In H460/DDP cells, the CLO3A1 was among the up -regulated genes compared to H460 cells.COL3A1 overexpression and its association with poor survival in patients with adenocarcinoma were detected by public database analysis. In A549 and H1299 cells, COL3A1 overexpression was associated with increased cell growth and clone formation but decreased cell apoptosis, whereas its reduced expression led to decreased cell growth and clone formation and increased cell apoptosis. Conclusion: COL3A1 is upregulated in lung cancer cells with DDP resistance, and its downregulation sensitizes the cells to DDP.