Enhancer of zeste homologue 2 (EZH2) expression in synovial sarcomas as a promising indicator of prognosis

Authors

  • Ulviye Yalçınkaya Department of Surgical Pathology, Faculty of Medicine, Uludağ University, Bursa, Turkey
  • Nesrin Uğraş Department of Surgical Pathology, Faculty of Medicine, Uludağ University, Bursa, Turkey
  • Gonca Özgün Department of Surgical Pathology, Faculty of Medicine, Başkent University, Ankara, Turkey
  • Gökhan Ocakoğlu Department of Biostatistics, Faculty of Medicine, Uludağ University, Bursa, Turkey
  • Adem Deligönül Department of Medical Oncology, Faculty of Medicine, Uludağ University, Bursa, Turkey
  • Sibel Kahraman Çetintaş Department of Radiation Oncology, Faculty of Medicine, Uludağ University, Bursa, Turkey
  • Muhammed Sadık Bilgen Department of Orthopedics, Faculty of Medicine, Uludağ University, Bursa, Turkey

DOI:

https://doi.org/10.17305/bjbms.2017.1938

Keywords:

Enhancer of zeste homologue 2 (EZH2), immunohistochemistry, prognostic factors, synovial sarcoma, survival analysis

Abstract

Synovial sarcoma (SS) is a type of soft-tissue sarcoma, often linked to poor survival. Although overexpression of enhancer of zeste homologue 2 (EZH2) has been associated with poor prognosis in different tumors, a few studies investigated this link in SS. Here, we analyzed the relationship between EZH2 expression and prognostic factors in SS. We included 29 patients with SS. Immunostaining of EZH2 was performed with (D2C9) XPTM Rabbit mAb antibody, and the results were classified as low EZH2 expression (negative or weak expression) and high EZH2 expression category (moderate or strong expression). Analysis of survival in relation to prognostic factors was performed with Kaplan-Meier survival curves and Cox proportional hazard regression analysis. Our sample included 19/29 female and 10/29 male patients, with age range 16-63 years. The tumor diameter ranged from 2 to 15 cm. Necrosis was observed in 15/29 cases. Sixteen cases had >10 mitoses per 50 high-power fields (HPFs). Out of 29 cases, 14 showed low and 15 had high EZH2 expression. Statistically significant results were obtained for the association between the presence of metastasis and necrosis (p = 0.042), high EZH2 expression and distant metastasis (p = 0.018), high EZH2 expression and necrosis (p = 0.016), and high EZH2 expression and the tumor size >5 cm versus tumor size ≤5 cm (p = 0.014). Patients with all of the following: the tumor size ≤5 cm, low EZH2 expression, and without necrosis and distant metastasis had significantly longer survival time. Our results are consistent with previous studies, suggesting that EZH2 overexpression is an indicator of poor prognosis in SS.

Author Biographies

  • Ulviye Yalçınkaya, Department of Surgical Pathology, Faculty of Medicine, Uludağ University, Bursa, Turkey
    Department of Surgical Pathology
  • Nesrin Uğraş, Department of Surgical Pathology, Faculty of Medicine, Uludağ University, Bursa, Turkey
    Department of Surgical Pathology
  • Gonca Özgün, Department of Surgical Pathology, Faculty of Medicine, Başkent University, Ankara, Turkey
    Department of Surgical Pathology
  • Gökhan Ocakoğlu, Department of Biostatistics, Faculty of Medicine, Uludağ University, Bursa, Turkey
    Department of Biostatistics
  • Adem Deligönül, Department of Medical Oncology, Faculty of Medicine, Uludağ University, Bursa, Turkey
    Department of Medical Oncology
  • Sibel Kahraman Çetintaş, Department of Radiation Oncology, Faculty of Medicine, Uludağ University, Bursa, Turkey
    Department of Radiation Oncology
  • Muhammed Sadık Bilgen, Department of Orthopedics, Faculty of Medicine, Uludağ University, Bursa, Turkey
    Department of Orthopedics

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Enhancer of zeste homologue 2 (EZH2) expression in synovial sarcomas as a promising indicator of prognosis

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20-11-2017

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1.
Enhancer of zeste homologue 2 (EZH2) expression in synovial sarcomas as a promising indicator of prognosis. Biomol Biomed [Internet]. 2017 Nov. 20 [cited 2024 Mar. 28];17(4):302-8. Available from: https://bjbms.org/ojs/index.php/bjbms/article/view/1938