ArticleCancer research and treatment2026
NOVA1 Activation Modulates the Tumor Immune Microenvironment through STING Phosphorylation in Head and Neck Squamous Cell Carcinoma.
Article in Cancer research and treatment, 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
purposeNeuro-oncological ventral antigen 1 (NOVA1), a neuron-specific pre-mRNA splicing factor, is involved in neuronal development and oncogenesis. NOVA1 overexpression is associated with favorable prognosis in head and neck squamous cell carcinoma (HNSCC) and gastric adenocarcinoma, whereas its downregulation correlates with poor outcomes. High NOVA1 levels in these cancers correlate with increased CD3+ and CD8+ T lymphocyte densities, suggesting involvement in tumor immune-inflammatory signals. This study explores NOVA1's role in regulating the immune-inflammatory cGAS-STING pathway in HNSCC cells and clinical tissues. MATERIALS AND
methodsHNSCC cell lines (FaDu, YD-10B, SNU-1066, and SNU-1076) were transfected with NOVA1 and poly(dA:dT). Quantitative real-time polymerase chain reaction and Western blot analysis were used to assess gene/protein expression. Enzymelinked immunosorbent assay quantified cytokine levels, and immunoprecipitation assessed protein interactions. Clinical tissue samples from 234 HNSCC patients were analyzed using immunohistochemistry to correlate NOVA1 and STING pathway markers with immune cell infiltration.
resultsNOVA1 overexpression in HNSCC cells increased phosphorylation of STING (p-STING) without altering cGAS or TBK1. Immunoprecipitation showed an interaction between NOVA1 and p-STING. Overexpression of NOVA1, particularly with poly(dA:dT) treatment, tended to elevate CCL5 and CXCL10 expression. In clinical samples, NOVA1 expression strongly correlated with p-STING levels (r=0.749, p<0.001). Higher NOVA1 and p-STING expressions were linked to increased infiltration of CD3+ T cells, CD8+ T cells, and FOXP3+ regulatory T cells.
conclusionNOVA1 modulates the cGAS-STING pathway through STING phosphorylation and associated immune responses in HNSCC, providing a potential therapeutic target for enhancing anti-tumor immunity.
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