Abstract
Preferentially expressed antigen of melanoma (PRAME) is a cancer/testis antigen selectively expressed in somatic tissues and various solid malignant tumors and is associated with poor prognostic outcome. Our research aimed to comprehensively compare its expression in a large cohort of tubo-ovarian epithelial tumors and examine its correlation with our clinico-pathologic data, as well as to assess its potential use in diagnostics and therapy.
We examined 485 cases of epithelial tubo-ovarian tumors including 107 clear cell carcinomas (CCC), 52 endometroid carcinomas (EC), 103 high grade serous carcinomas (HGSC), 119 low grade serous carcinomas (LGSC)/micropapillary variant of serous borderline tumors (mSBT), and 104 cases of mucinous carcinomas (MC)/mucinous borderline tumors (MBT). The immunohistochemical analysis was performed using TMAs.
The highest levels of expression were seen in EC (60%), HGSC (62%), and CCC (56%), while expression in LGSC/mSBT (4%) and MC/MBT (2%) was rare. The clinico-pathologic correlations and survival analysis showed no prognostic significance.
The results of our study showed that PRAME is neither prognostic nor a suitable ancillary marker in the differential diagnosis of tubo-ovarian epithelial tumors. Nevertheless, knowledge about the PRAME expression may be important concerning its potential predictive significance, because targeting PRAME as a potential therapeutic option is currently under investigation.
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All data generated or analyzed during this study is included in this published article (and its Supplementary information files).
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Funding
This work was supported by the Ministry of Health, Czech Republic (RVO VFN 64165 and AZV NV19-03–00007), by Charles University (Project UNCE204065, SVV260631), and by the European Regional Development Fund (EF16_013/0001674 and BBMRI_CZ LM2023033).
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Pavel Dundr and Kristýna Němejcová performed the study concept and design. All authors participated on material preparation, data collection, and / or analyses. Romana Michálková provided statistical analysis. The first draft of the manuscript was written by Adam Šafanda. All authors commented on previous versions of the manuscript and approved the final manuscript.
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The study was approved by the Ethics Committee of the General University Hospital in Prague in compliance with the Helsinki Declaration (No. 2140/19 S-IV). The Ethics Committee waived the requirement for informed consent as according to the Czech Law (Act. no. 373/11, and its amendment Act no. 202/17), it is not necessary to obtain informed consent in fully anonymized studies.
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Šafanda, A., Kendall Bártů, M., Michálková, R. et al. Immunohistochemical expression of PRAME in 485 cases of epithelial tubo-ovarian tumors. Virchows Arch 483, 509–516 (2023). https://doi.org/10.1007/s00428-023-03629-z
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DOI: https://doi.org/10.1007/s00428-023-03629-z