ArticleInternational journal of molecular sciences2026
GV1001 Reprograms CD47 Immune Checkpoint to Restore Macrophage Antitumor Activity in Oral Squamous Cell Carcinoma.
Article in International journal of molecular sciences, 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
Cluster of Differentiation 47 (CD47) functions as a key "don't-eat-me" signal that enables cancer cells to evade macrophage-mediated immune clearance. GV1001, a 16-amino-acid peptide derived from human telomerase reverse transcriptase (hTERT), has been reported to exhibit antitumor and anti-inflammatory properties and to downregulate CD47 expression in human cells. In this study, we investigated whether GV1001 modulated CD47 expression and enhanced antitumor immunity in oral squamous cell carcinoma (OSCC). In vitro, GV1001 significantly reduced CD47 expression in both murine and human OSCC cells in dose- and time-dependent manners, resulting in a marked increase in macrophage-mediated phagocytosis. Mechanistically, GV1001 suppressed CD47 promoter activity and inhibited multiple upstream regulator expression in murine and human OSCC cell lines, while exerting minimal effects on normal human keratinocytes and fibroblasts. In vivo, GV1001 significantly inhibited tumor growth, suppressed CD47 expression, increased macrophage infiltration, and induced tumor cell necrosis and apoptosis in both murine OSCC syngeneic graft model and human OSCC xenograft model. GV1001 administered alone or in combination with cisplatin produced antitumor effects. Collectively, these findings demonstrate that GV1001 functions as a potent immunomodulatory anticancer peptide that downregulates CD47 expression and restores macrophage-mediated tumor clearance, highlighting its potential as a therapeutic strategy for OSCC.
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