ArticleCell death & disease2026
Ubenimex synergizes with the PD-L1 blockade in gastric cancer by competitively binding LAP3 with UBE3A.
Article in Cell death & disease, 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
Immune checkpoint inhibitors (ICIs), particularly PD-1/PD-L1 blockade, represent a cornerstone of treatment for advanced gastric cancer (GC). However, their clinical efficacy is hampered by low response rates and the development of both primary and acquired resistance, underscoring the need for innovative combination therapies. In this study, we investigate the potential of Ubenimex, an immunomodulator and inhibitor of leucyl aminopeptidase 3 (LAP3), in enhancing the therapeutic efficacy of PD-L1 blockade in GC. Using a syngeneic GC mouse model, we demonstrate that Ubenimex significantly augments the efficacy of anti-PD-L1 therapy. We further explore the role of LAP3 in GC progression and find that it is highly expressed in both GC tissues and cells, with elevated LAP3 levels correlating with poor prognosis. Functionally, LAP3 facilitates immune evasion through impaired CD8
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