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논문 기본 정보

자료유형
학술저널
저자정보
Park Wonyoung (Pusan National University) Wei Shibo (Sungkyunkwan University School of Medicine) Xie Chu-Long (Sun Yat-sen University Cancer Center) Han Jung Ho (Korea Institute of Oriental Medicine) Kim Bo-Sung (Pusan National University) Jin Jung-Sook (Pusan National University) Yang Eun-Sun (Pusan National University) Cho Min Kyoung (Kosin University College of Medicine) Ryu Dongryeol (Gwangju Institute of Science and Technology (GIST)) Yang Hao-Xian (Sun Yat-sen University Cancer Center) Bae Sung-Jin (Kosin University College of Medicine) Ha Ki-Tae (Pusan National University)
저널정보
대한생화학·분자생물학회 Experimental and Molecular Medicine Experimental and Molecular Medicine Vol.56
발행연도
2024.5
수록면
1,137 - 1,149 (13page)
DOI
10.1038/s12276-024-01221-2

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Osimertinib, a selective third-generation epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor (TKI), effectively targets the EGFR T790M mutant in non-small cell lung cancer (NSCLC). However, the newly identified EGFR C797S mutation confers resistance to osimertinib. In this study, we explored the role of pyruvate dehydrogenase kinase 1 (PDK1) in osimertinib resistance. Patients exhibiting osimertinib resistance initially displayed elevated PDK1 expression. Osimertinib-resistant cell lines with the EGFR C797S mutation were established using A549, NCI-H292, PC-9, and NCI-H1975 NSCLC cells for both in vitro and in vivo investigations. These EGFR C797S mutant cells exhibited heightened phosphorylation of EGFR, leading to the activation of downstream oncogenic pathways. The EGFR C797S mutation appeared to increase PDK1-driven glycolysis through the EGFR/AKT/HIF-1α axis. Combining osimertinib with the PDK1 inhibitor leelamine helped successfully overcome osimertinib resistance in allograft models. CRISPR-mediated PDK1 knockout effectively inhibited tumor formation in xenograft models. Our study established a clear link between the EGFR C797S mutation and elevated PDK1 expression, opening new avenues for the discovery of targeted therapies and improving our understanding of the roles of EGFR mutations in cancer progression.

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