MND1 Promotes the Proliferation of Prostate Cancer Cell via the CCNB1/p53 Signaling Pathway.

Introduction: Prostate cancer (PCa) is one of the most commonly diagnosed can-cers in men, with a high global incidence. The Meiotic Nuclear Division 1 (MND1) protein is essential for the repair of DNA double-strand breaks during meiosis, but its role in PCa re-mains poorly understood. This study aims to explore the function of MND1 in PCa progression and the mechanism involved.

Methods: RNA-Seq data from the TCGA and GEO databases were analyzed. Kaplan-Meier (KM) method and χ2 test examined the association between MND1 expression, prognosis, and clinical parameters. PCa cell lines (22RV1 and C4-2) were used for functional assays. CCK-8, EdU, colony formation assay, flow cytometry analysis and xenograft model were used to evaluate the effects of MND1 on PCa cell proliferation in vitro and in vivo.

Results: MND1 expression was significantly upregulated in PCa tissues, particularly in cases with Gleason scores ≥8, and correlated with poorer disease-free survival (DFS) and adverse clinical features. Functionally, elevated MND1 expression promoted PCa cell proliferation both in vitro and in vivo. Mechanistically, MND1 facilitated cell cycle progression from G0/G1 to S phase via activation of the CCNB1/p53 signaling pathway.

Conclusion: MND1 promotes prostate cancer progression by facilitating the G0/G1 to S phase transition via the CCNB1/p53 pathway, making it a promising prognostic marker and potential therapeutic target.