ArticleJournal for immunotherapy of cancer2025
Dual targeting OX40 and IL-2 receptor enhances antitumor activity through tumor-infiltrating Treg depletion and CD8
Article in Journal for immunotherapy of cancer, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- OX40 signaling in cancer immunotherapy: mechanisms of action, translational applications, and therapeutic perspectives.Frontiers in immunology · 2026Review
- Downregulation of oar-miR-125b Drives Blood-Brain Barrier Breakdown Through the TNFSF4-NF-κB Inflammatory Axis in Enterococcus Faecalis Meningitis.Microorganisms · 2025Article
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9 authors.
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Abstract
backgroundThe strong regulatory T cell (Treg) inhibitory activity and dysfunctional cytotoxic T lymphocytes (CTLs) represent major barriers to effective antitumor immunity, particularly in late-stage cancer. Multiple anti-OX40 (aOX40) agonistic antibodies have been developed but exhibit limited antitumor efficacy. Interleukin-2 (IL-2) effectivity expands CTLs but has severe side effects.
methodsWe construct an aOX40-mIL2-Fc bispecific antibody through Fab physical blocking and attenuated IL-2 with Rβ reducing N88D mutation. We also produced aOX40-Fc and IL-2/aOX40-Fc as a comparison using the 293F expression system. Single-cell and flow cytometry were used to analyze the change of T-cell subsets in the tumor microenvironment (TME). Mouse tumor models were used to assess the antitumor efficacy of aOX40-mIL2-Fc by tumor growth and survival, and toxicity by body weight loss, inflammatory cytokine production, and natural killer (NK) cell proliferation in the blood. The tumor-bearing mice were randomly assigned, and the average size was similar among various groups.
resultsaOX40-mIL2-Fc bispecific antibody-cytokine exhibited a synergistic therapeutic effect with limited toxicity, outperforming IL-2-Fc or aOX40 alone treatment, and conferring resistance to tumor rechallenge. On cellular mechanisms, aOX40-mIL2-Fc treatment showed great Treg depletion and increased both stem-like and effector functional terminal CD8
conclusionsOur study unveils a novel approach to IL-2 design that addresses several critical shortcomings of existing strategies and elucidates the cellular mechanisms underlying aOX40-mIL2-Fc therapy. Meanwhile, combining aOX40-mIL2-Fc with PD-L1 blockade represents a strategic approach to enhance tumor control and overcome resistance to immune checkpoint blockade therapies synergistically.
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