PO.CL01.01 · 临床研究
一种肿瘤不可知的YAP/TAZ评分可独立于Hippo改变预测TEAD抑制剂敏感性
A tumor-agnostic YAP/TAZ score predicts TEAD inhibitor sensitivity independent of Hippo alterations
作者与单位 Authors & Affiliations
摘要 Abstract
中文摘要
YAP和TAZ是Hippo通路效应因子,它们结合TEAD转录因子以驱动致癌程序。TEAD抑制剂(TEADi)的首次人体试验在既往治疗过的间皮瘤患者中显示出活性和耐受性,然而当前试验聚焦于间皮瘤和罕见的Hippo改变肿瘤,尽管YAP/TAZ在多种实体瘤中具有广泛的致癌作用。YAP/TAZ靶基因标签能否识别出具有高YAP/TAZ活性和潜在TEADi敏感性的、超出这些适应症之外的肿瘤,仍不明确。
我们使用一个22基因标签,在来自INFORM和DKFZ/NCT/DKTK MASTER(MASTER)试验的2390例晚期儿童癌症以及3746例晚期罕见癌症或年轻成人(<51岁)癌症中分析了YAP/TAZ活性。以间皮瘤和YAP融合驱动的室管膜瘤为基准,揭示了各实体篮子中存在具有相当或更高YAP/TAZ活性、独立于Hippo改变的癌症亚群。
为剖析肿瘤内在与基质的贡献,我们使用微阵列和Xenium平台对MASTER样本进行了空间转录组学分析(n=106个核心,来自代表>70种组织学亚型的89个肿瘤)。肿瘤细胞YAP/TAZ评分与整体(bulk)评分强相关(r=0.61),而成纤维细胞(r=0.23)和免疫细胞(r=0.35)的相关性较弱,表明整体评分很大程度上反映肿瘤细胞活性。
我们重点报道了一例MET扩增癌的MASTER患者,其在MET抑制剂capmatinib治疗中的进展与YAP/TAZ评分的显著升高相吻合。在MET扩增的HS746T胃癌细胞中,遗传性YAP/TAZ激活降低了capmatinib敏感性,而这可被TEAD抑制部分逆转,支持一种此前未被认识的YAP/TAZ相关耐药机制。
为评估YAP/TAZ标签的预测能力,用IAG933(Ω-环结合型TEADi)或VT107(TEAD自棕榈酰化抑制剂)处理了23个癌细胞系和30个患者来源的球体培养物(PDSC)。跨化合物和模型,与TEADi应答最强相关的基因表达富集于YAP/TAZ靶点,从而能够优化TEADi应答标签。这一优化后的标签与药物应答曲线下面积(AUC)值相关(IAG933:细胞系Pearson r=0.81,PDSC r=0.60;VT107:r=0.46和r=0.45)。
值得注意的是,从INFORM/MASTER肿瘤衍生的优化标签可预测匹配PDSC中的TEADi应答(n=13;IAG933 r=0.70,VT107 r=0.72),IC50值低至30 nM。敏感的PDSC包括非典型畸胎样/横纹肌样瘤、结直肠癌和胰腺癌——它们均缺乏Hippo改变,且代表通常不被认为由YAP/TAZ驱动的实体。
总之,这些数据为一项基于转录的分层临床试验提供了充分依据,该试验将在儿童和成人晚期癌症中评估TEAD抑制,而不论其Hippo改变状态。
查看英文原文 English abstract
YAP and TAZ are Hippo pathway effectors that bind TEAD transcription factors to drive oncogenic programs. First-in-human trials of TEAD inhibitors (TEADis) showed activity and tolerability in pretreated mesothelioma patients, yet current trials focus on mesotheliomas and rare Hippo-altered tumors, despite the broad oncogenic role of YAP/TAZ in various solid cancers. Whether YAP/TAZ target gene signatures can identify tumors with high YAP/TAZ activity and potential TEADi sensitivity beyond these indications remains unclear.
We profiled YAP/TAZ activity using a 22-gene signature across 2390 advanced pediatric and 3746 advanced rare cancers or cancers from young adults (<51y) from the INFORM and DKFZ/NCT/DKTK MASTER (MASTER) trials. Benchmarking against mesothelioma and YAP fusion-driven ependymoma revealed subsets of cancers across entity baskets with equal or higher YAP/TAZ activity independent of Hippo alterations.
To dissect tumor-intrinsic versus stromal contributions, we performed spatial transcriptomics on MASTER samples using microarrays and the Xenium platform (n=106 cores from 89 tumors representing >70 histological subtypes). Tumor-cell YAP/TAZ scores correlated strongly with bulk scores (r=0.61), whereas fibroblast (r=0.23) and immune-cell (r=0.35) correlations were weak, indicating that bulk scores largely reflect tumor-cell activity.
We highlight a MASTER patient with MET-amplified carcinoma in whom progression on the MET inhibitor capmatinib coincided with a marked YAP/TAZ-score increase. In MET-amplified HS746T gastric cancer cells, genetic YAP/TAZ activation reduced capmatinib sensitivity, partially reversed by TEAD inhibition, supporting an unrecognized YAP/TAZ-linked resistance mechanism.
To evaluate predictive capacity of the YAP/TAZ signature, 23 cancer cell lines and 30 patient-derived spheroid cultures (PDSCs) were treated with IAG933 (Ω-loop-binding TEADi) or VT107 (TEAD autopalmitoylation inhibitor). Across compounds and models, expression of genes most strongly associated with TEADi response were enriched for YAP/TAZ targets, enabling refinement of a TEADi response signature. This refined signature correlated with area-under-the-drug-response-curve (AUC) values (IAG933: Pearson r=0.81 for cell lines, r=0.60 for PDSCs; VT107: r=0.46 and r=0.45).
Notably, the refined signature derived from INFORM/MASTER tumors predicted TEADi response in matched PDSCs (n=13; r=0.70 for IAG933, r=0.72 for VT107), with IC50 values as low as 30 nM. Sensitive PDSCs included atypical rhabdoid tumor, colorectal, and pancreatic carcinoma - all lacking Hippo alterations and representing entities not typically considered YAP/TAZ-driven.
In summary, these data provide a strong rationale for a transcription-based stratified clinical trial evaluating TEAD inhibition across pediatric and adult advanced cancers irrespective of Hippo alterations.
利益披露 Disclosure
M. Wegert-Verhoeven, None..
M. Fransisca, None..
S. Martin, None..
A. Jady, None..
D. Richter, None..
M. Oles, None..
T. A. Blindauer, None..
J. Mallm, None..
J. Paluncic, None..
C. Dagostino, None..
O. Ermakova, None..
A. Schneider, None..
M. The, None..
A. Baude-Müller, None..
K. Beck, None..
M. Bullemer, None..
V. D. P. Meza, None..
V. Venkataramani, None..
R. C. Bargou, None..
H. Becker, None..
M. Boerries, None..
A. Tuchscherer, None..
D. MASTER consortium, None..
M. Wermke, None..
A. Brunschweiger, None..
M. Al-Saeedi, None..
D. Jäger, None..
O. Witt, None..
D. Schapiro, None..
B. Küster, None..
A. Hartig, None..
M. Allgaeuer, None..
A. Brobeil, None..
C. E. Heilig, None..
M. V. Teleanu, None..
S. Kreutzfeldt, None..
P. Horak, None..
D. Hübschmann, None..
W. Hartmann, None..
M. Trautmann, None..
I. Oehme, None..
C. R. Ball, None..
S. Fröhling, None..
S. M. Pfister, None..
H. Glimm, None..
S. M. Dieter, None.