Clinical Research Directory

Integrated Genomics in Oncogene-driven NSCLC With Acquired Resistance

Currently, tyrosine kinase inhibitor (TKI) remains the standard of care for oncogene-driven non-small cell lung cancer (NSCLC). However, almost all oncogene-driven NSCLCs would develop acquired resistance against TKI in clinical practice. Therefore, understanding the molecular mechanisms underlying the acquired resistance is a critical issue in lung cancer. Based on the literature, acquired resistance mechanism against EGFR TKI includes EGFR secondary mutation (T790M, C797X, L792X, G796X, L718Q, and exon 20 insertions), MET amplification, HER2 amplification, acquired gene fusions, and other complex alterations. From the perspective of mutagenesis, the acquired resistance against TKI may be associated with APOBEC mutational processes, kataegis, chromothripsis, extrachromosomal DNA (ecDNA), and the interaction among them. However, still 30% to 50% of oncogene-driven NSCLCs had no identified mechanism attributed to the acquired resistance. Previous studies mostly used targeted-gene sequencing, which may overlook some structural variation and the transcriptomic dynamics. This study aims to investigate the genomic alterations, mutational processes, and the transcriptomic landscape underlying the acquired resistance using integrated genomics.

Study on the Mechanism of Acquired Resistance of Entrectinib

The goal of this observational study is to learn about the mechanism of acquired resistance in first line trearment of ROS1-positive NSCLC with entrectinib. The main question it aims to answer is: what is the acquired resistant mechanism of entrectinib as first line treatment setting in patients? Tissue or blood samples of participants who have already taken entrectinib as their regular medical care for NSCLC will send for Next gene sequencing for genomic profiles and bioinformatic analysis.