小柯机器人

CLIP1-LTK融合是非小细胞肺癌的致癌驱动因素
2021-11-28 13:53
来源：小柯机器人

日本国家癌症中心Koichi Goto、Susumu S. Kobayashi等研究人员合作发现，CLIP1-LTK融合是非小细胞肺癌的致癌驱动因素。相关论文于2021年11月24日在线发表在《自然》杂志上。

研究人员在一个多机构的基因组筛选平台（LC-SCRUM-Asia, UMIN000036871）中使用全转录组测序，发现了一个新的CLIP1和LTK的融合转录。在0.4%的非小细胞肺癌（NSCLC）中存在CLIP1-LTK融合体，并且与其他已知的致癌驱动因素相互排斥。结果表明，CLIP1-LTK融合蛋白的激酶活性是组成性激活的，并具有转化潜力。
 
用ALK抑制剂lorlatinib处理表达CLIP1-LTK的Ba/F3细胞，可抑制CLIP1-LTK的激酶活性，进而抑制增殖并诱导凋亡。一名携带CLIP1-LTK融合的NSCLC患者对lorlatinib治疗表现出良好的临床反应。这是首次描述LTK改变在癌症中具有致癌活性。这些结果确定了CLIP1-LTK融合是NSCLC的一个靶点，可以用lorlatinib治疗。
 
据介绍，肺癌是最具侵略性的肿瘤类型之一。按致癌因子分层的靶向治疗大大改善了NSCLC患者的治疗效果。然而，在25-40%的肺腺癌（NSCLC最常见的组织学亚型）病例中没有发现这种致癌驱动因素。
 
附：英文原文

Title: The CLIP1–LTK fusion is an oncogenic driver in non‐small‐cell lung cancer

Author: Izumi, Hiroki, Matsumoto, Shingo, Liu, Jie, Tanaka, Kosuke, Mori, Shunta, Hayashi, Kumiko, Kumagai, Shogo, Shibata, Yuji, Hayashida, Takuma, Watanabe, Kana, Fukuhara, Tatsuro, Ikeda, Takaya, Yoh, Kiyotaka, Kato, Terufumi, Nishino, Kazumi, Nakamura, Atsushi, Nakachi, Ichiro, Kuyama, Shoichi, Furuya, Naoki, Sakakibara-Konishi, Jun, Okamoto, Isamu, Taima, Kageaki, Ebi, Noriyuki, Daga, Haruko, Yamasaki, Akira, Kodani, Masahiro, Udagawa, Hibiki, Kirita, Keisuke, Zenke, Yoshitaka, Nosaki, Kaname, Sugiyama, Eri, Sakai, Tetsuya, Nakai, Tokiko, Ishii, Genichiro, Niho, Seiji, Ohtsu, Atsushi, Kobayashi, Susumu S., Goto, Koichi

Issue&Volume: 2021-11-24

Abstract: Lung cancer is one of the most aggressive tumour types. Targeted therapies stratified by oncogenic drivers have substantially improved therapeutic outcomes in patients with non-small-cell lung cancer (NSCLC)1. However, such oncogenic drivers are not found in 25–40% of cases of lung adenocarcinoma, the most common histological subtype of NSCLC2. Here we identify a novel fusion transcript of CLIP1 and LTK using whole-transcriptome sequencing in a multi-institutional genome screening platform (LC-SCRUM-Asia, UMIN000036871). The CLIP1–LTK fusion was present in 0.4% of NSCLCs and was mutually exclusive with other known oncogenic drivers. We show that kinase activity of the CLIP1–LTK fusion protein is constitutively activated and has transformation potential. Treatment of Ba/F3 cells expressing CLIP1–LTK with lorlatinib, an ALK inhibitor, inhibited CLIP1–LTK kinase activity, suppressed proliferation and induced apoptosis. One patient with NSCLC harbouring the CLIP1–LTK fusion showed a good clinical response to lorlatinib treatment. To our knowledge, this is the first description of LTK alterations with oncogenic activity in cancers. These results identify the CLIP1–LTK fusion as a target in NSCLC that could be treated with lorlatinib.

DOI: 10.1038/s41586-021-04135-5

Source: https://www.nature.com/articles/s41586-021-04135-5

Nature：《自然》，创刊于1869年。隶属于施普林格·自然出版集团，最新IF：69.504
官方网址：http://www.nature.com/
投稿链接：http://www.nature.com/authors/submit_manuscript.html


本期文章：《自然》：Online/在线发表

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