Lidocaine as a Potential Therapeutic Agent in Colorectal Cancer: A Study of Gene Expression and Prognosis.

Background: Colorectal cancer (CRC) is a significant contributor to cancer-related mortality globally. Despite the availability of treatments such as surgery, chemotherapy, and radiotherapy, these interventions are often accompanied by severe side effects and suboptimal patient outcomes. Recent studies have suggested that lidocaine, a widely used local anesthetic, may possess anti-tumor properties in various cancer types. This study aims to explore the impact of lidocaine on CRC cell lines, HCT 116 and SW480, to evaluate its potential as a therapeutic agent. Methods: In vitro assays were conducted to assess the effect of lidocaine on the proliferation, migration, and invasion of CRC cells. The suppression of cell proliferation and induction of apoptosis were confirmed using colony formation, EdU, and TUNEL assays. RNA sequencing was performed on lidocaine-treated HCT 116 cells to identify differentially expressed genes and enriched biological pathways. A prognostic signature based on 16 genes was developed and validated using clinical data. Results: Lidocaine significantly inhibited the proliferation, migration, and invasion of CRC cells in a dose-dependent manner. The assays confirmed that lidocaine suppressed cell proliferation and induced apoptosis. RNA sequencing revealed 8002 differentially expressed genes in lidocaine-treated HCT 116 cells, with significant enrichment of key pathways such as the estrogen signaling pathway and MAPK pathway. A prognostic signature based on 16 genes was developed and validated, providing a predictive model for patient survival. These findings suggest that lidocaine has potential as a therapeutic agent for CRC treatment, although further in vivo studies are required to clarify its mechanisms and optimize its clinical application.