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Subtitle:
Article type: Research Article
Authors: Chen, Zhanwei | Wu, Haiwei | Huang, Shengyun | Li, Wengang | Zhang, Shizhou | Zheng, Peihui | Zhou, Xiaoqing | Liu, Wenlei | Zhang, Dongsheng*
Affiliations: Department of Oral and Maxillofacial Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China
Correspondence: [*] Corresponding author: Dongsheng Zhang, Proffessor, Dean, Department of Oral and Maxillofacial Surgery, Shandong Provincial Hospital Affiliated to Shandong University, 324 Jingwu Road, Jinan 250021, China. Tel.: +86 531 68776950; Fax: +86 531 87035697; E-mail: [email protected]
Abstract: BACKGROUND: The expression of Bcl-2/adenovirus E1B 19 kDa-interacting protein3 (BNIP3) has been explored in many human malignancies, but not in adenoid cystic carcinoma (ACC). OBJECTIVE: This study investigated the clinical significance of expression of BNIP3 in ACC tissues and cells and elucidated its correlations to hypoxia-induced autophagy. METHODS: Immunohistochemical and immunofluorescence staining were used to explore BNIP3, HIF-1α and LC3 expression. RESULTS: BNIP3 was positively expressed in 41 cases (63.1%), and was significantly correlated with histological grade (P= 0.001). HIF-1α was positively expressed in 52 cases (80.0%) and was significantly correlated with TNM stage (P= 0.023) and histological grade (P= 0.024). LC3 was positively expressed in 37 cases (56.9%) and was significantly correlated with TNM stage (P= 0.019). The expression of BNIP3 was correlated with HIF-1α expression (P= 0.011). The overall survival in the negative BNIP3 expression group tended to be better than in the positive BNIP3 expression (P= 0.011). In vitro experiment, BNIP3 immunofluorescence staining was detected in cells treated with CoCl2 (for hypoxic condition). CONCLUSIONS: The data indicated that BNIP3 plays a vital role in the tumorigenesis of adenoid cystic carcinoma and could be a new target for gene therapy of adenoid cystic carcinoma.
Keywords: Adenoid cystic carcinoma, hypoxia, BNIP3, HIF-1α, autophagy
DOI: 10.3233/CBM-150474
Journal: Cancer Biomarkers, vol. 15, no. 4, pp. 467-475, 2015
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