1. Genomic, immunologic, and prognostic associations of TROP2 (TACSTD2) expression in solid tumors.
- Author
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Morgenstern-Kaplan, Dan, Kareff, Samuel A, Trabolsi, Asaad, Rodriguez, Estelamari, Krause, Harris, Ribeiro, Jennifer R, Tan, Heng, Antonarakis, Emmanuel S, Lou, Emil, Nagasaka, Misako, Algaze, Sandra, Lenz, Heinz-Josef, Liu, Stephen V, Halmos, Balazs, Hoon, Dave S B, Seeber, Andreas, Ma, Patrick C, El-Deiry, Wafik S, Vanderwalde, Ari M, and Lopes, Gilberto
- Subjects
PROTEINS ,GENOMICS ,RESEARCH funding ,BREAST tumors ,FISHER exact test ,DNA ,COLORECTAL cancer ,DESCRIPTIVE statistics ,MANN Whitney U Test ,CHI-squared test ,GENE expression ,IMMUNOHISTOCHEMISTRY ,KAPLAN-Meier estimator ,PANCREATIC tumors ,GENES ,GENE expression profiling ,TUMORS ,TUMOR antigens ,GENETIC mutation ,SEQUENCE analysis ,OVERALL survival ,HEPATOCELLULAR carcinoma ,CYCLIN-dependent kinases - Abstract
Background TROP2 (TACSTD2) expression is associated with decreased overall survival (OS) in some solid tumors, and the TROP2-targeting antibody-drug conjugate (ADC) sacituzumab govitecan has been approved in breast and urothelial carcinomas. We aimed to explore the multi-omic landscape associated with TACSTD2 gene expression in various solid tumors to identify patients most likely to benefit from this approach. Methods Breast (N = 11 246), colorectal (N = 15 425), hepatocellular (N = 433), pancreatic (N = 5488), and urothelial (N = 4125) tumors were stratified into quartiles by TACSTD2 gene expression, analyzed by next-generation DNA sequencing, whole transcriptome sequencing, and immunohistochemistry at Caris Life Sciences (Phoenix, AZ). Survival data were obtained from insurance claims, and Kaplan-Meier estimates were calculated for molecularly defined cohorts. Results Several pathogenic mutations were associated with TACSTD2 -high tumors, including TP53 in breast, colorectal (CRC), pancreatic, and hepatocellular cancers; KRAS in pancreatic and CRC cancers; ARID1A and FGFR3 in urothelial cancer; and CTNNB1 in hepatocellular cancer. TACSTD2-low breast tumors were enriched for copy number amplifications in CCND1 and FGF/R family member genes. TACSTD2 high was generally associated with more immune cell infiltration and greater T-cell inflammation scores. Patients with TACSTD2 -high breast, CRC, and pancreatic cancers demonstrated a significantly shorter OS than TACSTD2 -low tumors. This was restricted to CRC with microsatellite stable tumors and patients with pancreatic cancer with KRAS -mutant tumors. Patients with breast cancer with TACSTD2 -high tumors also experienced significantly worse OS following immune checkpoint inhibitors. Conclusions TACSTD2 expression is associated with key driver alterations and a more active immune microenvironment, suggesting possible combinatorial strategies with TROP2-targeting ADCs plus immunotherapy in various solid tumors. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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