Repurposing FDA-Approved Antimalarial Drugs: Mefloquine as a Promising Multi-Targeted Therapeutic for Non-Small Cell Lung Cancer

Repurposing Antimalarials: Mefloquine for Multi-Targeted NSCLC Therapy

Abstract

Lung cancer, particularly non-small cell lung cancer (NSCLC), remains a major global health challenge, accounting for 85% of cases. Despite progress in targeted and immunotherapies targeting mutations like EGFR, MET, and RET, issues such as drug resistance, high treatment costs, and limited efficacy persist. Drug repurposing has emerged as a promising strategy to overcome these obstacles. This study investigates the potential of FDA-approved antimalarial drugs as multi-target therapies for NSCLC. Fourteen antimalarial drugs were screened using molecular docking, leveraging their established safety profiles. Mefloquine (MQ), artesunate, artemether, and quinine showed strong binding affinities for EGFR, MET, and RET targets, with MQ exhibiting the most significant interactions. Molecular dynamics (MD) simulations confirmed MQ's stability and favorable binding to these targets, supported by RMSD, RMSF, and Rg analyses. In vitro tests using the Sulforhodamine B (SRB) assay demonstrated a dose-dependent inhibitory effect of MQ on A549 NSCLC cell proliferation, with notable reductions in cell viability at concentrations as low as 10 µM. The findings suggest MQ’s potential as a cost-effective therapeutic candidate for NSCLC treatment, either alone or in combination with other therapies. Further research is needed to explore MQ's anticancer mechanisms and optimize its clinical use.