1
|
Vingiani A, Lorenzini D, Conca E, Volpi CC, Trupia DV, Gloghini A, Perrone F, Tamborini E, Dagrada GP, Agnelli L, Capone I, Busico A, Pruneri G. Pan-TRK immunohistochemistry as screening tool for NTRK fusions: A diagnostic workflow for the identification of positive patients in clinical practice. Cancer Biomark 2023; 38:301-309. [PMID: 37545217 DOI: 10.3233/cbm-220357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
BACKGROUND Pan-TRK inhibitors Entrectinib and Larotrectinib have been recently approved as tumor-agnostic therapies in NTRK1-2-3 rearranged patients and there is therefore an urgent need to identify reliable and accessible biomarkers for capturing NTRK fusions in the real-world practice. OBJECTIVE We aim to assess the analytical validity of the recently released pan-TRK assay (Ventana), running a head-to-head comparison between immunohistochemistry and Archer FusionPlex Lung Panel (ArcherDX) that is designed to detect key fusions in 13 genes, also including NTRK1-3. METHODS Pan-TRK IHC and NGS analysis were conducted on a retrospective/prospective cohort of 124 cancer patients (carcinomas, 93 cases; soft tissue sarcomas, 19; primary central nervous system tumours, 10; and neuroblastomas, 2). FISH data were available in most of the IHC/NGS discordant cases. RESULTS A comparison between IHC and NGS results was carried out in 117 cases: among 30 pan-TRK positive cases, NTRK rearrangement by NGS was found in 11 (37%), while one of the 87 (1.1%) pan-TRK negative cases (a case of NSCLC) showed a TPM3-NRTK1 rearrangement by NGS. Accordingly, sensitivity and specificity of IHC in predicting NTRK status were 91.7% and 81.9%, respectively, while negative (NPV) and positive predictive value (PPV) were 98.8% and 36.7%, respectively. CONCLUSIONS These data lead to suggest that IHC with VENTANA pan-TRK antibody can be a reliable screening tool for the identification of patients potentially bearing NTRK rearranged tumours.
Collapse
Affiliation(s)
- Andrea Vingiani
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
- Department of Oncology and Hematoncology, University of Milan, Milan, Italy
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
| | - Daniele Lorenzini
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
| | - Elena Conca
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
| | - Chiara Costanza Volpi
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
| | - Desirè Viola Trupia
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
| | - Annunziata Gloghini
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
| | - Federica Perrone
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
| | - Elena Tamborini
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
| | - Gian Paolo Dagrada
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
| | - Luca Agnelli
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
| | - Iolanda Capone
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
| | - Adele Busico
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
- Department of Oncology and Hematoncology, University of Milan, Milan, Italy
| | - Giancarlo Pruneri
- Department of Diagnostic Innovation, Foundation IRCCS National Cancer Institute, Milan, Italy
- Department of Oncology and Hematoncology, University of Milan, Milan, Italy
- Department of Oncology and Hematoncology, University of Milan, Milan, Italy
| |
Collapse
|