Currently, prostate cancer is one of the major malignant tumors in males. Recurrence and metastasis are the main obstacles that prevent the effective treatment of prostate cancer. In the present study, we aimed to evaluate emodin (EG) against human prostate cancer PC3 and DU145?cells. Our study showed that EG significantly decreased the cell viability of PC3 and DU145?cells and strikingly induced non-apoptotic cell death via necroptosis that was visualized through colony formation assay, Hoechst 33258 staining, and TEM analysis. Furthermore, RNA-sequencing and KEGG functional enrichment analysis revealed that the necroptosis-related pathway was activated upon EG treatment in PC3?cells. mRNA and protein expression of necroptosis markers were analyzed by qPCR and immunoblotting, which implied that EG-induced cell necroptosis via enhancing the expression of MLKL and HSP90AA1 activating PGAM pathway which is considered as a key mediator of mitochondrial fission and leading to ROS generation in PC3 and DU145?cells. Thus, our findings suggested that EG is a new small molecule agonist that induced necroptosis in prostate cancer cells via the mitochondrial fission HSP90/MLKL/PGAM pathway.
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