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JOURNAL ARTICLE

APE1/Ref-1 as a Serological Biomarker for the Detection of Bladder Cancer

Ju Hyun Shin, Sunga Choi, Yu Ran Lee, Myoung Soo Park, Yong Gil Na, Kaikobad Irani, Sang Do Lee, Jin Bong Park, Jin Man Kim, Jae Sung Lim, Byeong Hwa Jeon
Cancer Research and Treatment: Official Journal of Korean Cancer Association 2015, 47 (4): 823-33
25672588

PURPOSE: Apurinic/apyrimidinic endonuclease 1/redox factor-1 (APE1/Ref-1) is a multifunctional protein that shows elevated expression in a number of cancers. We attempted to determine whether serum APE1/Ref-1 is elevated in patients with bladder cancer.

MATERIALS AND METHODS: Serum APE1/Ref-1 levels were determined using enzyme-linked immunosorbent assay in serum from patients with bladder cancer who had not received chemotherapy or radiotherapy (n=51) and non-tumor controls (n=55). The area under the receiver operating characteristic area under the curve was applied to determine the correlation between clinical factors and the serum levels of APE1/Ref-1.

RESULTS: Serum levels of APE1/Ref-1 in bladder cancer patients were significantly elevated compared to those of the control group (3.548 ± 0.333 ng/100 μL [n=51] for bladder cancer vs. 1.547 ± 0.319 ng/100 μL [n=55] for the control group), with a sensitivity and specificity of 93% and 59%, respectively. Serum APE1/Ref-1 levels are associated with tumor stage, grade, muscle invasion, and recurrence.

CONCLUSION: Serum APE1/Ref-1 might be useful as a potential serologic biomarker for bladder cancer.

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