Abstract
Purpose
Rearrangement of the neurotrophic tyrosine kinase receptor (NTRK) 1 gene is a target of tropomyosin receptor kinase A (TRKA) inhibitors, and its targeted drug (larotrectinib) has been approved by the US Food and Drug Administration. We investigated the existence and prognostic importance of NTRK1 variation in esophageal squamous cell carcinoma (ESCC).
Methods
Fluorescence in situ hybridization of a NTRK1 rearrangement was conducted on 523 ESCC samples through tissue microarrays. Kaplan–Meier curves with log-rank tests were used to evaluate survival.
Results
We identified 8 (1.5%), 35(6.7%) and 109 (20.8%) cases with a NTRK1 rearrangement using 15%, 10% and 5% as cut-off values, respectively. We observed copy number (CN) variation of NTRK1 in some cases: 79 (15.1%) cases had a gain in NTRK1 CN ≥ 3, and 24 (4.6%) cases had NTRK1 CN ≥ 4. A NTRK1 rearrangement at the above-mentioned thresholds was not related to disease-free survival (DFS, P = 0.45, 0.47, 0.87) and overall survival (OS, P = 0.80, 0.74, 0.57), respectively. Gain in NTRK1 CN was associated with a poor prognosis irrespective of whether NTRK1 CN ≥ 4 (DFS, P = 0.015; OS, P = 0.035) or NTRK1 CN ≥ 3 (DFS, P = 0.039; OS, P = 0.025).
Conclusion
A NTRK1 rearrangement occurred rarely in ESCC. The increased CN of NTRK1 might be a prognostic indicator for DFS and OS in patients with ESCC.
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Data availability
All data generated or analyzed during this study are included in this published article.
Code availability
Not applicable.
Abbreviations
- NTRK1 :
-
Neurotrophic Tyrosine Kinase Receptor 1
- TRKA:
-
Tropomyosin receptor kinase A
- CN:
-
Copy number
- EC:
-
Esophageal carcinoma
- ESCC:
-
Esophageal squamous cell carcinoma
- RTK:
-
Receptor tyrosine kinase
- TRK:
-
Tropomyosin receptor kinase
- FISH:
-
Fluorescence in situ hybridization
- TMA:
-
Tissue microarrays
- DFS:
-
Disease-free survival
- OS:
-
Overall survival
- ALK :
-
Anaplastic lymphoma kinase
- EGFR :
-
Epidermal growth factor receptor
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Funding
This work was financially supported by Shanghai Natural Science Foundation of China (No. 18ZR1406800), National Natural Science Foundation of China (No. 81702372), Xiamen Science and Technology Project of Fujian Province, China (No. 3502Z20184003), Shanghai Municipal Commission of Science and Technology (No. 19441904000), Shanghai Municipal Key Clinical Specialty (No. shslczdzk01302), and Shanghai Science and Technology Development Fund (No. 19MC1911000).
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Conceptualization: YH, DJ; Methodology: YH, DJ, QS; Formal analysis and investigation: ZY, HW, JH, XW; Writing—original draft preparation: ZY, HW, ZJ, WC; Writing—review and editing: YH, DJ, JX, JS, HW, LT; Funding acquisition: YH, DJ. All authors read and approved the final manuscript.
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Ethical approval was obtained from the Ethics Committee of Zhongshan Hospital of Fudan University (Shanghai, China). Our study was in accordance with the Declaration of Helsinki 1975 and its later amendments.
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Yu, Z., Wang, H., Song, Q. et al. Prognostic value and characterization of NTRK1 variation by fluorescence in situ hybridization in esophageal squamous cell carcinoma. J Cancer Res Clin Oncol 147, 3113–3121 (2021). https://doi.org/10.1007/s00432-021-03578-7
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DOI: https://doi.org/10.1007/s00432-021-03578-7