Cited by 2,291Cancer Immunotherapy and BiomarkersImmunotherapy and Immune ResponsesT-cell and B-cell Immunology

PD-L1 expression as a predictive biomarker in cancer immunotherapy

Patel, Sandip Pravin, Kurzrock, Razelle·2015·Molecular Cancer Therapeutics

Abstract

The resurgence of cancer immunotherapy stems from an improved understanding of the tumor microenvironment. The PD-1/PD-L1 axis is of particular interest, in light of promising data demonstrating a restoration of host immunity against tumors, with the prospect of durable remissions. Indeed, remarkable clinical responses have been seen in several different malignancies including, but not limited to, melanoma, lung, kidney, and bladder cancers. Even so, determining which patients derive benefit from PD-1/PD-L1-directed immunotherapy remains an important clinical question, particularly in light of the autoimmune toxicity of these agents. The use of PD-L1 (B7-H1) immunohistochemistry (IHC) as a predictive biomarker is confounded by multiple unresolved issues: variable detection antibodies, differing IHC cutoffs, tissue preparation, processing variability, primary versus metastatic biopsies, oncogenic versus induced PD-L1 expression, and staining of tumor versus immune cells. Emerging data suggest that patients whose tumors overexpress PD-L1 by IHC have improved clinical outcomes with anti-PD-1-directed therapy, but the presence of robust responses in some patients with low levels of expression of these markers complicates the issue of PD-L1 as an exclusionary predictive biomarker. An improved understanding of the host immune system and tumor microenvironment will better elucidate which patients derive benefit from these promising agents.

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Crossref · 10.1158/1535-7163.mct-14-0983

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  • Limited biomarkers such as PD-L1 expression and tumor mutation load are clinically used to predict immunotherapy benefit.

    “Currently, limited biomarkers, such as PD-L1 expression (88) and tumor mutation load (TMB) (89–91), are clinically used to predict the immunotherapy benefit.”

    From New Horizons in KRAS-Mutant Lung Cancer: Dawn After Darkness (2019) · cites this paper as [88]

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Authors
Patel, S. P., & Kurzrock, R.
Affiliations
University of California San Diego (US)
Venue
Molecular Cancer Therapeutics
Published
2015-04-01
Volume
14
Issue
4
Pages
847-856
ISSN
  • 1535-7163 (ISSN-L)
  • 1538-8514
OpenAlex
W2136859769
Cited by
2,291
References
112
Citations by year
2026: 76 · 2025: 156 · 2024: 231 · 2023: 261 · 2022: 278 · 2021: 318 · 2020: 282 · 2019: 202 · 2018: 189 · 2017: 157 · 2016: 110 · 2015: 27
FWCI
17.32
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular Cancer Therapeutics (publishedVersion)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Topics
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
Keywords
PD-L1, predictive biomarkers, cancer immunotherapy, PD-1/PD-L1 axis, tumor microenvironment, immunohistochemistry, anti-PD-1 therapy, immune checkpoint inhibitors, autoimmune toxicity, tumor-infiltrating immune cells, melanoma, lung cancer, kidney cancer, bladder cancer
MeSH terms
Animals, Humans, Immunohistochemistry, Immunotherapy, Neoplasms, Phenotype, Prognosis, Biomarkers, Gene Expression, Immunophenotyping, B7-H1 Antigen

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