https://scholars.lib.ntu.edu.tw/handle/123456789/579171
標題: | PD-L1 expression and outcome in patients with metastatic non-small cell lung cancer and EGFR mutations receiving EGFR-TKI as frontline treatment | 作者: | Chang C.-Y. Lai Y.-C. Wei Y.-F. CHUNG-YU CHEN Chang S.-C. |
關鍵字: | Epidermal growth factor receptor mutation; Epidermal growth factor receptor tyrosine kinase inhibitors; Programmed death-ligand 1 | 公開日期: | 2021 | 出版社: | Dove Medical Press Ltd | 卷: | 14 | 起(迄)頁: | 2301-2309 | 來源出版物: | OncoTargets and Therapy | 摘要: | Background: Epidermal growth factor receptor (EGFR) mutations are most common in Eastern Asia, and frequencies of 30-50% have been reported. EGFR-tyrosine kinase inhibitors (TKIs) are recommended as first-line therapeutic options for non-small cell lung cancer (NSCLC) with sensitizing EGFR mutations. Several immune checkpoint inhibitors have been successful in improving the outcomes of advanced lung cancer. The expression of programmed cell death-ligand 1 (PD-L1) on tumor cells plays an important role in predicting the efficacy of programmed cell death protein 1/PD-L1 inhibitors. The role of PD-L1 expression in tumors with EGFR mutation and its influence on clinical outcomes remain controversial. Methods: Patients with newly diagnosed metastatic NSCLC with sensitizing EGFR muta- tions who received the standard treatment, ie, EGFR-TKIs for mutant adenocarcinoma as the first-line treatment, were enrolled in this retrospective study. EGFR mutations and PD-L1 expression levels were detected by Cobas RT-PCR and Dako 22C3 immunohistochemistry staining, respectively. Results: From January 2011 to February 2019, 114 patients were enrolled. The average age was 62 years (range 34-92), and 45 (39.5%) patients were male. Among these patients, EGFR mutation analysis revealed exon 19 in-frame deletion in 55 (48.2%) patients, exon 21 L858R in 53 (46.5%) patients, and uncommon mutations in 6 (5.3%) patients. Among these patients with EGFR mutations, PD-L1 expression levels by tumor proportion score (TPS) were <1% in 54 (46.9%) patients, 1-49% in 50 (44.2%) patients, and ?50% in 10 (8.8%) patients. All patients received EGFR-TKIs as first-line treatment, and in the Kaplan-Meier analysis, progression-free survival was not significantly different among groups with differ- ent PD-L1 expression status. Conclusion: For patients with metastatic NSCLC and EGFR mutations, PD-L1 expression is not uncommon, but no significant influence on clinical outcomes was observed in patients receiving standard initial treatment. ? 2021 Chang et al. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85104100933&doi=10.2147%2fOTT.S290445&partnerID=40&md5=3b90cbd602c5d259f0b7df8cead039a9 https://scholars.lib.ntu.edu.tw/handle/123456789/579171 |
ISSN: | 1178-6930 | DOI: | 10.2147/OTT.S290445 | SDG/關鍵字: | afatinib; bevacizumab; epidermal growth factor receptor; erlotinib; gefitinib; programmed death 1 ligand 1; ramucirumab; adult; aged; Article; clinical outcome; EGFR gene; exon; female; gene deletion; gene mutation; human; major clinical study; male; metastasis; non small cell lung cancer; overall survival; progression free survival; protein expression; retrospective study; very elderly |
顯示於: | 醫學系 |
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