[Current management and future prospect of HER-2 mutant non-small cell lung cancer].

Since Erb-B2 receptor tyrosine kinase 2 (HER-2) was regarded as oncogenic driver gene for malignancies, HER-2 targeted therapy has benefited many patients with breast cancer and gastric cancer. However, as a member of the epidermal growth factor receptor (EGFR) family, HER-2 has failed to respond well to both traditional anti-HER-2 and anti-EGFR targeted agents when compared to EGFR in non-small cell lung cancer (NSCLC). It is reported that unlike gene copy number variation in breast cancer, HER-2 intragenic kinase domain mutations (the exon 20 in-frame insertions are dominant, and missense mutations in kinase domain are also observed) in NSCLC might account for the poor response to traditional HER-2 or EGFR tyrosine kinase inhibitors (TKIs). In this review, we summarize the pathogenesis, molecular variations, clinical features and current therapeutic strategies for HER-2 mutated NSCLC to discuss the challenges and perspectives for this population.自人表皮生长因子受体2(HER-2)变异被发现并确定为恶性肿瘤增殖驱动基因之后，靶向HER-2治疗在乳腺癌、胃癌领域中均取得了良好疗效。同属表皮生长因子受体(EGFR)家族成员的HER-2在非小细胞肺癌(NSCLC)中也是一种肿瘤驱动基因。但迄今为止，无论是传统的靶向HER-2治疗还是靶向EGFR治疗，均未在NSCLC中取得抗HER-2突变的理想疗效。NSCLC中HER-2变异主要是发生于HER-2基因激酶区(绝大部分类型为HER-2基因第20号外显子非框移插入突变，少部分为激酶区其他外显子错义突变)，而非HER-2基因拷贝数增加。这导致此类人群对传统的抗EGFR/HER-2小分子酪氨酸激酶抑制剂的疗效差。文章从HER-2的激活机制、分子亚型、临床病理特征和治疗现状入手，对HER-2突变型NSCLC进行综述，探讨了抗HER-2治疗在目前肺癌治疗领域所面临的挑战与展望。.