Article
作者: Keller, Charles ; Mirotaki, Hiroshi ; Bickford, Lissett R ; Rasmussen, Samuel V ; Goldenberg, Joshua M ; Chauhan, Shefali ; Imyanitov, Evgeny ; Wozniak, Agnieszka ; Berlow, Noah E ; Huang, Paul H ; Machado, Isidro ; Woods, Andrew D ; Kondo, Tadashi ; Llombart-Bosch, Antonio ; Nagamori, Kiyo ; Jones, Robin L ; Swift, Michael K ; Lathara, Melvin ; Nakamura, Takuro ; Gokgoz, Nalan ; Andrulis, Irene L ; Srinivasa, Ganapati ; Schöffski, Patrick ; Wunder, Jay ; Rudzinski, Erin R ; Thway, Khin ; Fisher, David E ; Lee, Che-Jui ; Wright, Hollis ; Samudio, Benjamin M
BACKGROUND:Systemic therapy for metastatic clear cell sarcoma (CCS) bearing EWSR1-CREB1/ATF1 fusions remains an unmet clinical need in children, adolescents, and young adults.
METHODS:To identify key signaling pathway vulnerabilities in CCS, a multi-pronged approach was taken: (i) genomic and transcriptomic landscape analysis, (ii) integrated chemical biology interrogations, (iii) development of CREB1/ATF1 inhibitors, and (iv) antibody-drug conjugate testing (ADC). The first approach encompassed DNA exome and RNA deep sequencing of the largest human CCS cohort yet reported consisting of 47 patient tumor samples and 8 cell lines.
RESULTS:Sequencing revealed recurrent mutations in cell cycle checkpoint, DNA double-strand break repair or DNA mismatch repair genes, with a correspondingly low to intermediate tumor mutational burden. DNA multi-copy gains with corresponding high RNA expression were observed in CCS tumor subsets. CCS cell lines responded to the HER3 ADC patritumab deruxtecan in a dose-dependent manner in vitro, with impaired long term cell viability.
CONCLUSION:These studies of the genomic, transcriptomic and chemical biology landscape represent a resource 'atlas' for the field of CCS investigation and drug development. CHK inhibitors are identified as having potential relevance, CREB1 inhibitors non-dependence of CCS on CREB1 activity was established, and the potential utility of HER3 ADC being used in CCS is found.