ArticleAdvanced science (Weinheim, Baden-Wurttemberg, Germany)2025
APOL2 Stabilizes Ku80 to Confer NHEJ-Mediated Radioresistance in Gastric Cancer.
Article in Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- PARG Governs a PARylation-Ubiquitination Toggle that Stabilizes RAD51AP1 to Drive Homologous Recombination-Mediated Chemoresistance.Cancer research · 2026Article
- APOL2 Stabilizes Ku80 to Confer NHEJ-Mediated Radioresistance in Gastric Cancer.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
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24 authors.
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Abstract
Radiotherapy is one of the most important adjuvant treatment methods for gastric cancer (GC). However, radioresistance remains a major clinical obstacle. In this study, APOL2 is identified as a key player in promoting non-homologous end joining (NHEJ)-mediated double-strand break (DSB) repair and enhancing radioresistance in GC. Bioinformatics and clinical data revealed that high APOL2 expression is correlated with poor prognosis in GC patients. Functional experiments showed that APOL2 overexpression enhances genomic stability by accelerating DSB repair via the NHEJ pathway, while APOL2 knockout impairs repair capacity. Mechanistically, APOL2 binds to and stabilizes Ku80 by enhancing USP7-mediated deubiquitylation, thereby increasing Ku80 protein levels to promote NHEJ repair, ultimately conferring radioresistance. Moreover, high-throughput screening identified formononetin (FN) as a small molecule capable of disrupting the APOL2-Ku80 interaction, thereby restoring radiosensitivity in GC cells. Our findings underscore the role of APOL2 in mediating radioresistance through Ku80 stabilization and highlight FN as a potential therapeutic agent to counteract radioresistance in GC treatment.
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