Affiliations: [a] Department of Oral and Maxillofacial Pathology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran | [b] Shiraz Institute for Cancer Research, Shiraz University of Medical Sciences, Shiraz, Iran | [c] School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran | [d] Department of Otolaryngology, Khalili Hospital, Shiraz Institute for Cancer Research, Shiraz University of Medical Sciences, Shiraz, Iran | [e] Oral and Dental Disease Research Center, Department of Oral and Maxillofacial Pathology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
Correspondence:
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Corresponding author: Azadeh Andisheh-Tadbir, Oral and Dental Disease Research Center, Department of Oral and Maxillofacial Pathology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran. Tel.: +98 0711 6263193 4; Fax: +98 0711 6270325; E-mail: [email protected].
Abstract: BACKGROUND: Interleukin-33 (IL-33) has been recently discovered as an influential factor in the process of tumor immunity, and is presented in cancer pathogenesis. OBJECTIVE: This study aimed to determine the serum levels of IL-33 in patients with benign and malignant Salivary gland tumors (SGTs). METHODS: This descriptive cross-sectional study was performed on 47 samples of malignant SGTs including 18 mucoepidermoid carcinoma (MEC), 8 adenoid cystic carcinoma (ADCC), 21 malignant mixed tumor (MMT), and 14 benign pleomorphic adenoma (PA). A control group was considered consisting of 28 healthy subjects. The serum level of IL-33 was measured by using sandwich ELISA method. The data were statistically analyzed through Kruskal-Wallis and Mann-Whitney tests. RESULTS: The median concentration of IL-33 was 6.91 in malignant, 5.14 in benign, and 5.01 in healthy cases, with a statistically significant difference (P= 0.001). The median serum levels of IL-33 increased significantly in ADCC (7.15), MEC (7.03), and MMT (6.91) compared with the control group (5.01) (P< 0.05). The mean rank of MEC was significantly higher than PA (P= 0.01). IL-33 concentration was positively and significantly correlated with the tumor stage (P= 0.02) and tumor size (P= 0.03). CONCLUSIONS: IL-33 could be suggested as a novel biomarker to distinguish different types of SGTs.
