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Pouloudi D, Manou M, Sarantis P, Tsoukalas N, Tsourouflis G, Dana E, Karamouzis MV, Klijanienko J, Theocharis S. Clinical Significance of Histone Deacetylase (HDAC)-1, -2, -4 and -6 Expression in Salivary Gland Tumors. Diagnostics (Basel) 2021; 11:diagnostics11030517. [PMID: 33799478 PMCID: PMC8000873 DOI: 10.3390/diagnostics11030517] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 03/09/2021] [Accepted: 03/11/2021] [Indexed: 12/13/2022] Open
Abstract
Salivary gland tumors (SGTs) comprise a group of rare neoplasms. Locally aggressive, recurrent and/or metastatic SGTs are notorious for their resistance to systemic therapy, making the need for carefully designed, prospective and randomized trials with useful predictive markers mandatory to define new effective therapeutic protocols. Histone Deacetylases (HDACs), are thought to play a crucial role in carcinogenesis. They affect the DNA structure, being also able to regulate its transcription, repair, and replication. This study aimed to evaluate-to our knowledge for the first time-the HDAC-1, -2, -4 and -6 immunohistochemical expression in SGTs and their potential use as prognostic biomarkers. Medical records and archival histopathological material of 58 (36 benign and 22 malignant) SGT patients were included in this study. The H-score was statistically correlated with the clinicopathological characteristics for all cases and patients' survival rate in malignant SGTs. HDAC-2 positivity was significantly associated with more prolonged overall survival (OS) of patients with malignant SGTs (p = 0.028), while HDAC-2 positivity and no HDAC-6 expression were associated with prolonged OS of patients with HG malignant SGT (p = 0.003 and p = 0.043, respectively). Additionally, a high HDAC-2 H-score was significantly associated with longer OS for HG malignant SGT patients (p = 0.027). In our study, HDAC-2 expression is a marker for good prognosis, whereas HDAC-6 expression indicated poor prognosis; thus, an inhibitor of HDAC-6 may be used to improve patients' survival.
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Affiliation(s)
- Despoina Pouloudi
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (D.P.); (M.M.); (P.S.); (N.T.); (E.D.)
| | - Maria Manou
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (D.P.); (M.M.); (P.S.); (N.T.); (E.D.)
| | - Panagiotis Sarantis
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (D.P.); (M.M.); (P.S.); (N.T.); (E.D.)
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece;
| | - Nikolaos Tsoukalas
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (D.P.); (M.M.); (P.S.); (N.T.); (E.D.)
| | - Gerasimos Tsourouflis
- 2nd Department of Propedeutic Surgery, School of Medicine, National and Kapodistrian, University of Athens, 115 27 Athens, Greece;
| | - Eougken Dana
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (D.P.); (M.M.); (P.S.); (N.T.); (E.D.)
| | - Michalis V. Karamouzis
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece;
| | | | - Stamatios Theocharis
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece; (D.P.); (M.M.); (P.S.); (N.T.); (E.D.)
- Department of Pathology, Institut Curie, 75248 Paris, France;
- Correspondence: or ; Tel.: +30-210-7462116; Fax: +30-210-7462157
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