ReviewFrontiers in immunology2026
Immunosuppressive cells as barriers to cancer therapy: mechanisms and emerging solutions.
Review in Frontiers in immunology, 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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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
6 authors.
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Abstract
Tumor microenvironment-resident immunosuppressive cells-comprising myeloid-derived suppressor cells, regulatory T cells, and tumor-associated macrophages-constitute primary obstacles to effective cancer immunotherapy. Advances in single-cell and spatial multi-omics have uncovered their substantial functional heterogeneity, tissue-adaptive reprogramming, and organ-specific architectures distinguishing primary tumors from metastatic lesions. Beyond canonical immune checkpoint pathways, non-canonical regulatory layers--including metabolic-immune crosstalk, epigenetic regulation, microbiome-mediated distant signaling, and therapy-induced adaptive remodeling-further reinforce treatment resistance. Based on these mechanistic insights, systematic synergistic strategies have been developed, such as multi-pathway checkpoint blockade, ADC-immunotherapy combinations, temporally and spatially optimized conventional therapies, and targeted agents that deplete or reprogram suppressive populations. Emerging biomarkers, repurposed pharmaceuticals, and pan-cancer therapeutic principles are refining patient stratification and combination regimens. This review offers a comprehensive framework for understanding and surmounting immunosuppressive barriers in cancer therapy.
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