ArticleMolecular oncology2026
Plecstatin inhibits hepatocellular carcinoma tumorigenesis and invasion through cytolinker plectin.
Article in Molecular oncology, 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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Abstract
Plecstatin (PST) is a potent anticancer agent in preclinical models, yet its precise mechanism of action and molecular specificity regarding its main targets, plectin and outer dense fiber protein 2 (ODF2), remain incompletely understood. Here, we dissected PST's mode of action using knockouts of plectin (PLEC) and ODF2 in SNU-475 hepatocellular carcinoma (HCC) cells. PST suppressed anchorage-independent growth and impaired 2D and 3D migration in a dose-dependent manner in both wild-type and ODF2-deficient cells, but not in PLEC-deficient cells, establishing plectin as the principal effector of PST's antitumor activity. Proteomic and functional analyses revealed that PST primarily disrupts cytoskeletal remodeling through plectin, while selectively affecting ciliogenesis-related pathways linked to ODF2 loss. Deletion of either protein attenuated PST-induced Ser51 phosphorylation of eIF2α, ATF4/GADD34 induction, and cytochrome c release, indicating cooperative involvement in integrated stress response (ISR). Correlative analysis of patient datasets confirmed associations between PLEC/ODF2 expression and ISR-related gene signatures, supporting the clinical relevance of this pathway. Together, these findings identify plectin as a key target of PST in disrupting cytoskeletal integrity and establish plectin/ODF2 axis in PST-driven stress adaptation in HCC.
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