Academic Journal
Resistance to PD-1/PD-L1 blockade: Mechanism and pharmacological strategies.
| Τίτλος: | Resistance to PD-1/PD-L1 blockade: Mechanism and pharmacological strategies. |
|---|---|
| Συγγραφείς: | Kim AMJ; University of Chicago Medicine Comprehensive Cancer Center, 5841 S Maryland Ave, Chicago, IL 60637, USA; Department of Obstetrics and Gynecology, University of Chicago, Chicago, IL, USA., Lee N; Borch Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN 47907, USA., Chen HY; Borch Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN 47907, USA., Lim SO; Borch Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN 47907, USA; Purdue Institute for Cancer Research, Purdue University, West Lafayette, IN 47907, USA; Purdue Institute for Drug Discovery, Purdue University, West Lafayette, IN 47907, USA. Electronic address: limsoe@purdue.edu. |
| Πηγή: | Pharmacological research [Pharmacol Res] 2026 Oct; Vol. 232, pp. 108404. Date of Electronic Publication: 2026 Aug 18. |
| Τύπος έκδοσης: | Journal Article; Review |
| Γλώσσα: | English |
| Στοιχεία περιοδικού: | Publisher: Elsevier Country of Publication: Netherlands NLM ID: 8907422 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1096-1186 (Electronic) Linking ISSN: 10436618 NLM ISO Abbreviation: Pharmacol Res Subsets: MEDLINE |
| Imprint Name(s): | Publication: Oct. 2015- : Amsterdam ; Elsevier Original Publication: London ; San Diego : Academic Press, c1989- |
| Ιατρικοί όροι (MeSH): | Neoplasms*/drug therapy , Neoplasms*/immunology , Neoplasms*/metabolism , Programmed Cell Death 1 Receptor*/antagonists & inhibitors , Programmed Cell Death 1 Receptor*/immunology , Immune Checkpoint Inhibitors*/therapeutic use , Immune Checkpoint Inhibitors*/pharmacology , B7-H1 Antigen*/antagonists & inhibitors , B7-H1 Antigen*/immunology , Drug Resistance, Neoplasm*, Tumor Microenvironment/drug effects ; Humans ; Animals |
| Περίληψη: | Immune checkpoint inhibitors (ICIs) targeting the PD-1/PD-L1 axis have transformed the realm of cancer treatment. Nevertheless, fewer than one in five patients derive durable benefit, and a substantial proportion of initial responders eventually relapse, reflecting a heterogeneous milieu of intrinsic and acquired mechanisms of resistance. Resistance to ICIs can arise from impaired neoantigen generation and presentation (low tumor mutational burden, loss of functional HLA class I and β2-microglobulin), defective IFN-γ/JAK-STAT signaling, co-expression of alternative checkpoints (LAG-3, TIM-3, TIGIT, CTLA-4), an immunosuppressive and metabolically hostile "cold" tumor microenvironment enriched in regulatory T cells, myeloid-derived suppressor cells, and M2-polarized macrophages, and clonal immunoediting. In this review, we synthesize the current landscape of PD-1/PD-L1-directed ICIs, dissect the molecular and cellular determinants of intrinsic and acquired resistance, and discuss emerging pharmacological strategies to overcome them, including next-generation checkpoint combinations (anti-LAG-3, anti-TIGIT), bispecific antibodies (e.g., PD-1/VEGF, PD-L1/TGF-β), antibody-drug conjugates, targeted-therapy and epigenetic combinations, innate immune agonists, oncolytic viruses, gut microbiome modulation, and biomarker-guided patient selection, with the goal of informing rational combination regimens capable of extending the benefit of checkpoint blockade to a substantially broader patient population. (Copyright © 2026 The Authors. Published by Elsevier Ltd.. All rights reserved.) |
| Competing Interests: | Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. |
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| Grant Information: | U01 CA272280 United States CA NCI NIH HHS |
| Contributed Indexing: | Keywords: Antibody engineering; Combination immunotherapy; Gut microbiome; Immune checkpoint inhibitor resistance; PD-1/PD-L1 blockade; Tumor microenvironment |
| Substance Nomenclature: | 0 (Programmed Cell Death 1 Receptor) 0 (Immune Checkpoint Inhibitors) 0 (B7-H1 Antigen) 0 (CD274 protein, human) 0 (PDCD1 protein, human) |
| Entry Date(s): | Date Created: 20260818 Date Completed: 20260919 Latest Revision: 20261014 |
| Update Code: | 20261014 |
| PubMed Central ID: | PMC13659229 |
| DOI: | 10.1016/j.phrs.2026.108404 |
| PMID: | 42612932 |
| Βάση Δεδομένων: | MEDLINE |
| ISSN: | 1096-1186 |
|---|---|
| DOI: | 10.1016/j.phrs.2026.108404 |