Faculty, Staff and Student Publications
Language
English
Publication Date
10-15-2024
Journal
Clinical Cancer Research
DOI
10.1158/1078-0432.CCR-24-0361
PMID
39150543
PMCID
PMC11479841
PubMedCentral® Posted Date
10-15-2025
PubMedCentral® Full Text Version
Author MSS
Abstract
Purpose: Large cell neuroendocrine carcinoma (LCNEC) is a high-grade neuroendocrine malignancy that, like small cell lung cancer (SCLC), is associated with the absence of druggable oncogenic drivers and dismal prognosis. In contrast to SCLC, however, there is little evidence to guide optimal treatment strategies, which are often adapted from SCLC and non-small cell lung cancer approaches.
Experimental design: To better define the biology of LCNEC, we analyzed cell line and patient genomic data and performed IHC and single-cell RNA sequencing of core needle biopsies from patients with LCNEC and preclinical models.
Results: In this study, we demonstrate that the presence or absence of YAP1 distinguishes two subsets of LCNEC. The YAP1-high subset is mesenchymal and inflamed and is characterized, alongside TP53 mutations, by co-occurring alterations in CDKN2A/B and SMARCA4. Therapeutically, the YAP1-high subset demonstrates vulnerability to MEK- and AXL-targeting strategies, including a novel preclinical AXL chimeric antigen receptor-expressing T cell. Meanwhile, the YAP1-low subset is epithelial and immune-cold and more commonly features TP53 and RB1 co-mutations, similar to those observed in pure SCLC. Notably, the YAP1-low subset is also characterized by the expression of SCLC subtype-defining transcription factors, especially ASCL1 and NEUROD1, and as expected, given its transcriptional similarities to SCLC, exhibits putative vulnerabilities reminiscent of SCLC, including delta-like ligand 3 and CD56 targeting, as is with novel preclinical delta-like ligand 3 and CD56 chimeric antigen receptor-expressing T cells, and DNA damage repair inhibition.
Conclusions: YAP1 defines distinct subsets of LCNEC with unique biology. These findings highlight the potential for YAP1 to guide personalized treatment strategies for LCNEC.
Keywords
Humans, YAP-Signaling Proteins, Transcription Factors, Adaptor Proteins, Signal Transducing, Lung Neoplasms, Carcinoma, Neuroendocrine, Cell Line, Tumor, Carcinoma, Large Cell, Animals, Mutation, Biomarkers, Tumor, Mice, Gene Expression Regulation, Neoplastic, Prognosis
Published Open-Access
yes
Recommended Citation
Stewart, C Allison; Diao, Lixia; Xi, Yuanxin; et al., "YAP1 Status Defines Two Intrinsic Subtypes of LCNEC with Distinct Molecular Features and Therapeutic Vulnerabilities" (2024). Faculty, Staff and Student Publications. 5415.
https://digitalcommons.library.tmc.edu/uthgsbs_docs/5415
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