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<p>While the recent FDA-approved antiandrogen enzalutamide (Enz) might prolong the survival of castration-resistant prostate cancer (CRPC) patients by an additional 4.8 months, most patients eventually might still develop Enz resistance within 6–12 months. Although few genes have been linked to Enz resistance in prostate cancer (PCa), the detailed mechanism(s) are still underinvestigated. Here, we found that Enz might function by altering androgen receptor(AR)-mediated CDR1/circCDR1-AS/miR-1290/BMP4 signaling to modulate PCa stem cells (CSCs) to increase Enz resistance. Mechanistic analysis revealed that Enz/AR signaling can transcriptionally regulate CDR1 expression by reducing binding to androgen response elements (AREs) on the CDR1 5’ promoter to alter circCDR1-AS expression. Enz/AR/CDR1/circCDR1-AS signaling might then increase BMP4 expression by altering miR-1290 expression, which involves direct binding to the 3’ UTR of BMP4 mRNA. Preclinical studies using a CWR22Rv1 xenograft mouse model and integrative analysis of GEO cohort data further demonstrated that targeting this newly identified Enz/AR/CDR1/circCDR1-AS/miR-1290/BMP4 signaling pathway with miR-1290, circCDR1-AS-shRNA, or BMP4-shRNA may help develop novel therapies to combat Enz resistance at the later stage of CRPC.</p>

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Increased antiandrogen enzalutamide sensitivity via altering prostate cancer stem cell traits through modulating the androgen receptor-mediated CDR1/circCDR1-AS/miR-1290/BMP4 signaling

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月4日

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  • Diwei Huo,
  • Minggui Si,
  • Kexin Yu,
  • Xiaoxue Fang,
  • Hongbo Liu,
  • Donglong Li,
  • Zhengxing Chen,
  • Jinguo Li,
  • Ruicong Xu,
  • Xinwang Su,
  • Yongfeng Du,
  • Xuebin Ma,
  • Xunwei Wang,
  • Pengbo Li,
  • Huike Yang,
  • Xiujie Chen,
  • Keliang Wang

摘要

While the recent FDA-approved antiandrogen enzalutamide (Enz) might prolong the survival of castration-resistant prostate cancer (CRPC) patients by an additional 4.8 months, most patients eventually might still develop Enz resistance within 6–12 months. Although few genes have been linked to Enz resistance in prostate cancer (PCa), the detailed mechanism(s) are still underinvestigated. Here, we found that Enz might function by altering androgen receptor(AR)-mediated CDR1/circCDR1-AS/miR-1290/BMP4 signaling to modulate PCa stem cells (CSCs) to increase Enz resistance. Mechanistic analysis revealed that Enz/AR signaling can transcriptionally regulate CDR1 expression by reducing binding to androgen response elements (AREs) on the CDR1 5’ promoter to alter circCDR1-AS expression. Enz/AR/CDR1/circCDR1-AS signaling might then increase BMP4 expression by altering miR-1290 expression, which involves direct binding to the 3’ UTR of BMP4 mRNA. Preclinical studies using a CWR22Rv1 xenograft mouse model and integrative analysis of GEO cohort data further demonstrated that targeting this newly identified Enz/AR/CDR1/circCDR1-AS/miR-1290/BMP4 signaling pathway with miR-1290, circCDR1-AS-shRNA, or BMP4-shRNA may help develop novel therapies to combat Enz resistance at the later stage of CRPC.