ArticleCancers2026
EIF3H Modulates Glycolysis Through LDHA Stabilization in Triple-Negative Breast Cancer.
Article in Cancers, 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
backgroundTriple-negative breast cancer (TNBC) lacks effective targeted therapies, and its dependence on glycolysis represents a potential metabolic vulnerability. EIF3H, the largest subunit of the eukaryotic translation initiation factor 3 complex and a putative deubiquitinase, has been implicated in tumor progression, but its role in TNBC metabolism remains unclear.
methodsEIF3H expression and prognostic value were evaluated in public datasets, clinical TNBC specimens, and cell lines. Functional roles were examined using proliferation, colony formation, migration, and xenograft assays. Mechanisms were investigated by mass spectrometry, co-immunoprecipitation, ubiquitination and glycolytic rate assays, macrophage co-culture, and single-cell transcriptomic analysis.
resultsEIF3H was significantly upregulated in TNBC and associated with poor survival. Transcriptionally activated by TRPS1, EIF3H bound to lactate dehydrogenase A (LDHA), reduced its ubiquitination, and prevented its proteasomal degradation. LDHA stabilization enhanced glycolysis and lactate production, thereby promoting TNBC cell proliferation and migration in vitro and tumor growth in vivo; these effects were abolished by LDHA knockdown and restored by LDHA re-expression. In addition, tumor-derived lactate induced M2 macrophage polarization via GPR65, which in turn reinforced malignant progression.
conclusionsOur findings define a TRPS1-EIF3H-LDHA axis that drives glycolysis-dependent TNBC progression and reveal lactate-GPR65 signaling as a mediator of tumor-macrophage crosstalk, supporting EIF3H as a potential prognostic biomarker and therapeutic target in TNBC.
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