ArticleFrontiers in oncology2026
RPL28 mediates sorafenib resistance in hepatocellular carcinoma by downregulating CDC6 expression.
Article in Frontiers in oncology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Not yet cited in PubMed.
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Corrections and comments
- Erratum issued
Authors and funding
5 authors.
Funding
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Abstract
Aim: Sorafenib is a milestone targeted therapy for advanced hepatocellular carcinoma (HCC), yet resistance to this agent severely limits its clinical efficacy. The molecular mechanisms underlying sorafenib resistance are incompletely understood. Ribosomal proteins (RPs) have been increasingly implicated in cancer progression and drug resistance, but the role and mechanism of ribosomal protein L28 (RPL28) in sorafenib resistance in HCC remains unexplored. Methods: We investigated the functional role of RPL28 in sorafenib-resistant HCC using HepG2 and HCCLM3 cell models. RPL28 was silenced by siRNA, and effects on cell proliferation, migration, and sorafenib sensitivity were assessed by CCK-8, migration assays, and IC Results: RPL28 expression was significantly reduced at both mRNA and protein levels in knockdown cells of sorafenib-resistant HepG2 and HCCLM3. RPL28 knockdown inhibited proliferation and migration in resistant HCC cells. Transcriptomic and proteomic analyses identified CDC6 as a key downstream target of RPL28. CDC6 expression was consistently decreased in RPL28 KD cells, while EGFR and TRAF6 remained unchanged. GO and KEGG pathway enrichment revealed that RPL28 modulates pathways involved in DNA replication, immune regulation, and metabolic adaptation. Notably, no significant changes were observed in MHC-I and PD-L1 expression following RPL28 knockdown. Conclusions: Our findings demonstrate that RPL28 contributes to sorafenib resistance in HCC by upregulating CDC6, contributing to tumor proliferation and drug resistance. The newly identified RPL28-CDC6 axis represents a novel mechanism of resistance and a potential therapeutic target to overcome treatment limitations in HCC.
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