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Identification of extracellular δ‐catenin accumulation for prostate cancer detection

Prostate cancer is the second leading cause of cancer death in men, and early detection is essential to reduce mortality and increase survival. δ‐Catenin is a unique β‐catenin superfamily protein primarily expressed in the brain but is upregulated in human prostatic adenocarcinomas. Despite its close correlation with the disease, it is unclear whether δ‐catenin presents the potential in prostate cancer screening because it is an intracellular protein. In this study, we investigated the hypothesis of δ‐catenin accumulation in the urine of prostate cancer patients and its potential pathways of excretion into extracellular milieu.