ArticleOncogene2026
CRISPR/Cas9 screening revealed BIRC6-AS1/BIRC6 mediates abiraterone resistance via NHEJ pathway-dependent A20 degradation in prostate cancer.
Article in Oncogene, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
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Funding
Abstract
Abiraterone acetate is a standard-of-care therapy for prostate cancer (PCa). However, resistance frequently emerges, often characterized by the progression to AR-independent phenotypes. Employing a genome-wide CRISPR/Cas9 library screening strategy, we identified 523 long non-coding RNAs (lncRNAs) and 2,183 protein-coding genes as potential candidates associated with abiraterone resistance. Notably, a pair of sense-antisense genes, BIRC6-AS1/BIRC6, was identified as a significant contributor to abiraterone resistance, serving as a critical survival factor in AR-independent contexts. BIRC6-AS1 depletion led to a reduction in both the mRNA and protein levels of BIRC6. Moreover, depletion of either BIRC6-AS1 or BIRC6 enhanced the sensitivity of PCa cells to abiraterone in both in vitro and in vivo settings. Further investigation revealed that BIRC6-AS1 stabilized the mRNA of BIRC6 through interaction with ILF2. Suppression of either BIRC6-AS1 or BIRC6 attenuated non-homologous end joining (NHEJ) repair activity, resulting in the disassembly of 53BP1 foci at DNA damage sites and an increased accumulation of DNA damage, thereby exposing a vulnerability in AR-independent resistant cells. Mechanistically, BIRC6 interacted with A20 and facilitated the K48-linked ubiquitination and subsequent degradation of A20 at the K337 residue. Additionally, A20 knockdown effectively reversed the abiraterone sensitivity induced by BIRC6-AS1 depletion. Collectively, our study provides a landscape of lncRNAs and protein-coding genes associated with abiraterone resistance and suggests that targeting the BIRC6-AS1/BIRC6 axis represents a potential therapeutic strategy to eradicate AR-independent resistant tumors in prostate cancer.
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Registered trials
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