LncRNA PCBP1-AS1-mediated AR/AR-V7 deubiquitination enhances prostate cancer enzalutamide resistance

Cell Death Dis. 2021 Sep 20;12(10):856. doi: 10.1038/s41419-021-04144-2.

Abstract

The refractory of castration-resistant prostate cancer (CRPC) is mainly reflected in drug resistance. The current research on the resistance mechanism of CRPC is still in its infancy. In this study, we revealed for the first time the key role of LncRNA PCBP1-AS1 in CRPC drug resistance. Through detailed in vivo and in vitro studies, we found that PCBP1-AS1 may enhance the deubiquitination of AR/AR-V7 by stabilizing the USP22-AR/AR-V7 complex, thereby preventing AR/AR-V7 from being degraded through the ubiquitin-proteasome pathway. Targeting PCBP1-AS1 can significantly restore the drug sensitivity of enzalutamide-resistant tumors in vivo and in vitro. Our research further expands the function of LncRNA in castration-resistant prostate cancer, which may provide new potential for clinical diagnosis and targeted therapy.

MeSH terms

  • Animals
  • Benzamides / pharmacology
  • Benzamides / therapeutic use*
  • Cell Line, Tumor
  • Cell Movement / genetics
  • Cell Proliferation / genetics
  • Drug Resistance, Neoplasm* / genetics
  • Gene Expression Regulation, Neoplastic / drug effects
  • Gene Knockdown Techniques
  • Humans
  • Male
  • Mice
  • Mice, Nude
  • Models, Biological
  • Nitriles / pharmacology
  • Nitriles / therapeutic use*
  • Phenotype
  • Phenylthiohydantoin / pharmacology
  • Phenylthiohydantoin / therapeutic use*
  • Prostatic Neoplasms / drug therapy*
  • Prostatic Neoplasms / genetics*
  • Prostatic Neoplasms / pathology
  • Prostatic Neoplasms, Castration-Resistant / drug therapy
  • Prostatic Neoplasms, Castration-Resistant / genetics
  • Prostatic Neoplasms, Castration-Resistant / pathology
  • Proteasome Endopeptidase Complex / metabolism
  • Protein Binding
  • Protein Domains
  • Protein Stability
  • Proteolysis
  • RNA, Long Noncoding / genetics
  • RNA, Long Noncoding / metabolism*
  • Receptors, Androgen / chemistry
  • Receptors, Androgen / metabolism*
  • Ubiquitin / metabolism
  • Ubiquitin Thiolesterase / metabolism
  • Ubiquitination* / drug effects

Substances

  • Benzamides
  • Nitriles
  • RNA, Long Noncoding
  • Receptors, Androgen
  • USP14 protein, human
  • Ubiquitin
  • Phenylthiohydantoin
  • enzalutamide
  • Ubiquitin Thiolesterase
  • Proteasome Endopeptidase Complex