https://doi.org/10.4081/ejh.2024.4063
Activation of Hedgehog pathway by circEEF2/miR-625-5p/TRPM2 axis promotes prostate cancer cell proliferation through mitochondrial stress
Submitted: 20 May 2024
Accepted: 29 August 2024
Published: 11 November 2024
Accepted: 29 August 2024
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All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.
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The purpose of this study was to identify the role played by circEEF2 (has-circ-0048559) in prostate cancer (PCa) development and to determine the potential mechanism involved. circEEF2, miR-625-5p, and the transient receptor potential M2 channel protein (TRPM2) were determined using RT-qPCR in PCa. Cell proliferation was determined by CCK-8 assay and colony formation assay, whereas migration and invasion were assessed by Transwell assay, and apoptosis was evaluated by flow cytometry after annexin V-FITC and propidium iodide staining. The interactions between circEEF2 and miRNAs were investigated through the Circular RNA Interactome database, and the downstream targets of miR-625-5p were forecasted using TargetScan. The interaction was confirmed using both the dual luciferase reporter gene assay and RNA pull-down assay. TRPM2, Hedgehog signaling pathway proteins (GLI1 and GLI2), ubiquinone oxidase subunit B8, and cytochrome C oxidase subunit IV (COX4) were analyzed by protein blotting. JC-1 fluorescence detection was applied for mitochondrial membrane potential changes, fluorescent probe assay for intracellular ROS levels, and immunofluorescence staining for γ-H2AX expression. The role of circEEF2 in PCa tumor growth was tested by xenograft experiments. CircEEF2 expression was upregulated in PCa (p<0.05). Cells of PCa were inhibited in proliferation, migration, invasion, and enhanced in apoptosis by depleting circEEF2 (p<0.05). circEEF2 directly targeted adsorbed miR-625-5p. TRPM2 bound to miR-625-5p. Upregulating TRPM2 likewise reversed the therapeutic effect of depleting circEEF2 on cancer development in PCa cells. circEEF2 activated the Hedgehog pathway through the miR-625-5p/TRPM2 axis, promotes mitochondrial stress, and promotes PCa development in vivo. circEEF2 upregulates mitochondrial stress to promote PCa by activating the Hedgehog pathway through the miR-625-5p/TRPM2 axis.
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Ethics Approval
the present study was approved by the Ethics Committee of Central People's Hospital of Zhanjiang, The animal experiments were approved by the Institutional Animal Care and Use Committee of Central People's Hospital of ZhanjiangHow to Cite
Zhu, C., Lin, L., Huang, C., & Wu, Z. (2024). Activation of Hedgehog pathway by circEEF2/miR-625-5p/TRPM2 axis promotes prostate cancer cell proliferation through mitochondrial stress. European Journal of Histochemistry, 68(4). https://doi.org/10.4081/ejh.2024.4063
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