4.8 Article

Intron retention is a hallmark and spliceosome represents a therapeutic vulnerability in aggressive prostate cancer

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NATURE COMMUNICATIONS
卷 11, 期 1, 页码 -

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NATURE PORTFOLIO
DOI: 10.1038/s41467-020-15815-7

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资金

  1. US NIH [R01CA237027, R01CA240290, R21CA237939, R21CA218635]
  2. Department of Defense [W81XWH-14-1-0575, W81XWH-16-1-0575]
  3. CPRIT [RP120380]
  4. NCI center grant [P30CA016056]
  5. NIH [U24CA232979]
  6. National Natural Science Foundation of China [81972418]
  7. Wuhan Frontier Science and Technology Program [2019020701011490]
  8. Fundamental Research Funds for the Central Universities

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The role of dysregulation of mRNA alternative splicing (AS) in the development and progression of solid tumors remains to be defined. Here we describe the first comprehensive AS landscape in the spectrum of human prostate cancer (PCa) evolution. We find that the severity of splicing dysregulation correlates with disease progression and establish intron retention as a hallmark of PCa stemness and aggressiveness. Systematic interrogation of 274 splicing-regulatory genes (SRGs) uncovers prevalent genomic copy number variations (CNVs), leading to mis-expression of 68% of SRGs during PCa development and progression. Consequently, many SRGs are prognostic. Surprisingly, androgen receptor controls a splicing program distinct from its transcriptional regulation. The spliceosome modulator, E7107, reverses cancer aggressiveness and inhibits castration-resistant PCa (CRPC) in xenograft and autochthonous PCa models. Altogether, our studies establish aberrant AS landscape caused by dysregulated SRGs as a hallmark of PCa aggressiveness and the spliceosome as a therapeutic vulnerability for CRPC.

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