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Journal Article
Research Support, Non-U.S. Gov't
Impact of apurinic/apyrimidinic endonuclease 1/redox factor-1 on treatment response and survival in oral squamous cell carcinoma.
Head & Neck 2016 April
BACKGROUND: Apurinic/apyrimidinic endonuclease 1/redox factor-1 (APE1/Ref-1) is a multifunctional protein involved in DNA repair and redox signaling. The purpose of this study was to investigate the relationship between APE1/Ref-1 expression and clinicopathological features, survival, and treatment response in patients with oral squamous cell carcinoma (OSCC) and cell lines.
METHODS: APE1/Ref-1 expression in OSCC was evaluated by immunohistochemistry, and its relationship to patient outcomes and treatment response was assessed statistically. The effects of stable short hairpin (sh)RNA-mediated knockdown of APE1/Ref-1 on cell survival, migration, and chemoradiation sensitivity were determined in OSCC cell lines.
RESULTS: APE1/Ref-1 immunostaining was correlated with positive lymph node status, and higher APE1/Ref-1 expression was significantly associated with poor prognosis and reduced treatment response. Consistent with the clinical studies, APE1/Ref-1 expression in OSCC cell lines was implicated in the regulation of migration and cisplatin-induced apoptosis.
CONCLUSION: Elevated APE1/Ref-1 expression may be used to predict poor survival and may confer chemoresistance in OSCC.
METHODS: APE1/Ref-1 expression in OSCC was evaluated by immunohistochemistry, and its relationship to patient outcomes and treatment response was assessed statistically. The effects of stable short hairpin (sh)RNA-mediated knockdown of APE1/Ref-1 on cell survival, migration, and chemoradiation sensitivity were determined in OSCC cell lines.
RESULTS: APE1/Ref-1 immunostaining was correlated with positive lymph node status, and higher APE1/Ref-1 expression was significantly associated with poor prognosis and reduced treatment response. Consistent with the clinical studies, APE1/Ref-1 expression in OSCC cell lines was implicated in the regulation of migration and cisplatin-induced apoptosis.
CONCLUSION: Elevated APE1/Ref-1 expression may be used to predict poor survival and may confer chemoresistance in OSCC.
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