Abstract
The survival rate of patients with advanced laryngeal cancer has not substantially improved over time. RNA sequencing analysis identified Keratin-1 (KRT1) as a gene potentially associated with cancer recurrence. This study investigated the association between KRT1 expression and recurrence in advanced laryngeal cancer. RNA sequencing was performed to identify candidate genes associated with recurrence. The effects of KRT1 expression on clinical outcomes were evaluated in patients with laryngeal cancer. Multiple experimental techniques were utilized. RNA sequencing of patient samples demonstrated higher KRT1 gene expression in the recurrence group than in non-recurrent cases. Patients with KRT1-positive immunostaining exhibited trends of worse overall survival (OS) and recurrence-free survival (RFS). In vitro studies showed that KRT1 knockdown suppressed tumor cell invasion, cell migration, and expression of epithelial-mesenchymal transition (EMT)-related genes in human head and neck squamous cell carcinoma (HNSCC) cell lines. KRT1 knockdown enhanced tumor cell apoptosis and exhibited synergistic effects with conventional radiation and chemotherapy treatments. KRT1 may serve as a biomarker for predicting advanced laryngeal cancer recurrence and assist with selecting patients to receive concurrent chemoradiotherapy (CCRT). Further molecular investigations are warranted to determine its effects, but KRT1 has potential as a therapeutic target.