ArticleCancers2026
Dictamnine Inhibits WNT Pathway and EMT Progression in Prostate Cancer and Remodels the Tumor Microenvironment.
Article in Cancers, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
objectiveThis study investigated the anti-prostate cancer mechanism of dictamnine (DIC), focusing on its potential to reverse EMT via DKK1-mediated Wnt/β-catenin inhibition and modulate the tumor microenvironment.
methodsCell viability, proliferation, migration, and invasion were assessed using CCK-8, colony formation, EdU, wound healing, and Transwell assays. Key targets were identified via transcriptomics and bioinformatics, and validated through molecular docking, co-immunoprecipitation, and cellular thermal shift assay. Protein expression was analyzed by Western blot. Gain/loss-of-function and rescue experiments confirmed target roles. A subcutaneous xenograft model and immunohistochemistry were used for in vivo validation.
resultsDIC suppresses prostate cancer malignancy in a concentration-dependent manner. The primary mechanism involves its direct binding to and stabilization of DKK1, which enhances DKK1's interaction with LRP6. This upregulation of DKK1 inhibits the Wnt/β-catenin signaling pathway, downregulating downstream targets β-catenin/c-Myc/Cyclin D1, and reverses epithelial-mesenchymal transition (EMT) markers. Additionally, DIC modulates key tumor microenvironment factors, including VEGF-A, MMP-9, IL-11, and CXCL-12. Overexpression of DKK1 mimics the antitumor effects of DIC, while knockdown of DKK1 attenuates them. In vivo, DIC inhibits tumor growth, an effect partly mediated through the DKK1/β-catenin axis. Furthermore, DIC potently suppresses angiogenesis (reduced CD31+ staining) independently of DKK1. It also increases tumor-associated macrophage infiltration (elevated F4/80+ cells) in a DKK1-independent manner.
conclusionsDIC exerts its core antitumor effects by targeting DKK1 to inhibit Wnt/β-catenin signaling and EMT. Additionally, it independently suppresses angiogenesis and remodels the immune tumor microenvironment. This multi-level mechanism positions DIC as a promising lead compound for prostate cancer therapy.
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