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Trop-2 is a ubiquitous and promising target in pancreatic adenocarcinoma
1Department of Hepato-Gastroenterology and Digestive Oncology, Pitié Salpêtrière Hospital, APHP, 47-83 Boulevard de l'Hôpital, Paris 75013, France; Sorbonne University, UPMC University, 15-21 Rue de l'École de Médecine, Paris 75006, France.
Background:
Trop-2 is overexpressed in tumor cells of various cancers, including pancreatic ductal adenocarcinoma (PDAC), and has emerged as a potent therapeutic target. We evaluated Trop-2 expression both at the transcriptomic and protein levels, and its correlation with tumor features and patients' outcomes in a large cohort of PDAC.
Methods:
We included patients undergoing pancreatic resection for PDAC in 5 academic hospitals in France and Belgium. Transcriptomic profiles were obtained from FFPE tissue samples, with paired primary -25and metastatic lesions when available. Protein expression was evaluated by immunohistochemistry (IHC) using tissue micro-arrays.
Results:
495 patients (male 54%, median age 63 years) were included between 1996 and 2012. Trop-2 mRNA expression was significantly associated to tumor cellularity, but no association with survival nor with any clinical or pathological features was observed, with tumor cells showing an overall high expression among every subgroup. Trop-2 mRNA expression was maintained between primary and metastatic lesion in all 26 paired samples evaluated. In 50 tumors assessed by IHC, 30%, 68% and 2% harbored a high, medium, or low Trop-2 expression score, respectively. Trop-2 staining was significantly associated to mRNA expression, but not to survival or any pathological features.
Conclusions:
Our results suggest Trop-2 overexpression as a ubiquitous marker of PDAC tumor cells and thus a promising therapeutic target to evaluate in these patients.
Insights
Trop-2 is highly expressed in pancreatic ductal adenocarcinoma (PDAC) tumor cells, showing consistent levels between primary and metastatic sites. This ubiquitous marker presents a promising therapeutic target for PDAC patients.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Therapeutics
Background:
- Trop-2 is overexpressed in various cancer types, including pancreatic ductal adenocarcinoma (PDAC).
- Trop-2 has emerged as a significant therapeutic target in oncology.
- Understanding Trop-2 expression in PDAC is crucial for targeted therapy development.
Purpose of the Study:
- To evaluate Trop-2 expression at transcriptomic and protein levels in PDAC.
- To correlate Trop-2 expression with tumor characteristics and patient outcomes.
- To assess Trop-2 as a potential therapeutic target in PDAC.
Main Methods:
- Analysis of transcriptomic profiles from FFPE tissue samples of PDAC patients.
- Evaluation of protein expression using immunohistochemistry (IHC) on tissue micro-arrays.
- Inclusion of 495 patients from 5 academic hospitals in France and Belgium (1996-2012).
Main Results:
- Trop-2 mRNA expression was associated with tumor cellularity but not survival or pathological features.
- High Trop-2 mRNA expression was consistent across all patient subgroups and between primary and metastatic lesions.
- Immunohistochemistry revealed high or medium Trop-2 expression in 98% of assessed PDAC tumors, correlating significantly with mRNA levels but not survival.
Conclusions:
- Trop-2 overexpression is a ubiquitous characteristic of PDAC tumor cells.
- Trop-2 represents a promising and validated therapeutic target for PDAC.
- Further evaluation of Trop-2-targeted therapies in PDAC patients is warranted.
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