Integrative bioinformatics screening of a M2 macrophage-associated gene signature for osimertinib resistance.

A 7-gene M2 macrophage-associated signature predicts osimertinib resistance in lung adenocarcinoma, with RRBP1 showing the strongest link to survival.

• Why it matters: Understanding non-genetic factors like tumor microenvironment contributions is crucial for overcoming osimertinib resistance, which remains a major clinical obstacle in LUAD treatment.
• What they did: Researchers used single-cell RNA sequencing of 6 NSCLC samples, WGCNA on GEO data, and machine learning to identify and validate a 7-gene signature associated with resistance, focusing on M2 macrophages.
• The result: RRBP1 was identified as a key regulator, with in vitro knockdown reducing cell viability and migration, and increasing sensitivity to osimertinib, suggesting its potential as a therapeutic target.