Co-Occurring Alterations of ERBB2 Exon 20 Insertion in Non-Small Cell Lung Cancer (NSCLC) and the Potential Indicator of Response to Afatinib

阿法替尼 医学 肺癌 内科学 肿瘤科 表皮生长因子受体 外显子 癌症 队列 吉非替尼 基因 生物 遗传学
作者
Bo Yuan,Jun Zhao,Chengzhi Zhou,Xiumei Wang,Bo Zhu,Minglei Zhuo,Xia Dong,Jian Feng,Cuihua Yi,Yunpeng Yang,Hua Zhang,Wangyan Zhou,Zhengtang Chen,Sheng Yang,Xinghao Ai,Kehe Chen,Xuefan Cui,Di-fa Liu,Chunmei Shi,Wei Wu,Yanjun Zhang,Lianpeng Chang,Jin Li,Rongrong Chen,Shuanying Yang
出处
期刊:Frontiers in Oncology [Frontiers Media]
卷期号:10 被引量:10
标识
DOI:10.3389/fonc.2020.00729
摘要

Background: Human epidermal growth factor receptor 2 (ERBB2, HER-2) exon 20 insertion (ERBB2ex20ins) remains a refractory oncogenic driver in lung cancer. So far there is limited data showing the co-occurring mutation background of ERBB2ex20ins in Chinese lung cancer and its relationship with response to afatinib. Patients and Methods: A total of 112 Chinese patients with ERBB2ex20ins identifiedby next-generation sequencing from 17 hospitals were enrolled. The clinical outcomes of 18 patients receiving afatinib treatment were collected. Results: Among the 112 patients, insertion-site subtypes comprised of A775ins (71%; 79/112), G776indel (17%; 19/112) and P780ins (12%; 14/112). There were 66.1% (74/112) of patients carrying TP53 co-mutation and FOXA1 was the most prevalent co-amplified gene (5.5%, 3/55). The co-occurring genomic feature was similar among three insertional-site subtypes and had an overall strong concordance with the western population from the MSKCC cohort (R2=0.74, P<0.01). For the prognosis, patients with co-occurring mutation in cell-cycle pathway especially TP53 showed shorter OS than patients without [median OS: 14.5m (95%CI:12.7m-16.3m) vs 30.3m (95% CI: not reached), p=0.04], while the OS was comparable among three subtypes. For the response to afatinib, ERBB2ex20ins as a subclonal variant was an independent factor relating to shorter PFS [median PFS: 1.2m (95%CI: 0.8-1.6m) vs 4.3m (95%CI: 3.3m-5.3m), p<0.05]. Conclusion: Our data revealed co-occurring TP53 represent an unfavorable prognosis of patients with ERBB2ex20ins, emphasizing the more valuable role of the co-mutation patterns than insertion-site subtypes in predicting prognosis of this group of patients. Moreover, the clonality status of ERBB2ex20ins was identified as a potential indicator for response to afatinib.
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