Cited by 116Cancer Immunotherapy and BiomarkersImmune Cell Function and InteractionCutaneous Melanoma Detection and Management

The DOI matches its Crossref record; 22 of the 22 references it cites were found in a registry or an index.

Integrated molecular and immunophenotypic analysis of NK cells in anti-PD-1 treated metastatic melanoma patients

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Abstract

Purpose: Anti-PD-1 therapy has revolutionized the treatment and improved the survival of stage IV melanoma patients. However, almost half of the patients fail to respond due to immune evasive mechanism. A known mechanism is the downregulation of major histocompatibility complex (MHC) class I expression, which prevents T cell recognition of the tumor. This study determined the relationship between natural killer (NK) cell numbers and clinical response to anti-PD-1 therapy in metastatic melanoma.Experimental Design: Twenty-five anti-PD-1 treated metastatic melanoma patients were categorized into responders (complete response (CR)/partial response (PR)/stable disease (SD) ≥ 6 mo, n = 13) and non-responders (SD < 6 days/progressive disease (PD), n = 12) based on RECIST response. Whole transcriptome sequencing and multiplex immunofluorescent staining were performed on pre-treatment and on a subset of early during treatment tumor samples. Spatial distribution analysis was performed on multiplex immunofluorescent images to determine the proximity of NK cells to tumor cells. Flow cytometry was used to confirm NK phenotypes in lymph node metastases of treatment naïve melanoma patients (n = 5). Cytotoxic assay was performed using NK cells treated with anti-PD-1 or with isotype control and co-cultured with 3 different melanoma cell lines and with K562 cells (leukemia cell line).Results: Differential expression analysis identified nine upregulated NK cell specific genes (adjusted p < 0.05) in responding (n = 11) versus non-responding patients (n = 10). Immunofluorescent staining of biopsies confirmed a significantly higher density of intra- and peri-tumoral CD16+ and granzyme B + NK cells in responding patients (p < 0.05). Interestingly, NK cells were in closer proximity to tumor cells in responding PD-1 treated patients compared to non-responding patients. Patients who responded to anti-PD-1 therapy, despite MHC class I loss had higher NK cell densities than patients with low MHC class I expression. Lastly, functional assays demonstrated PD-1 blockade induces an increase in NK cells’ cytotoxicity.Conclusions: A higher density of tumoral NK cells is associated with response to anti-PD-1 therapy. NK cells may play an important role in mediating response to anti-PD-1 therapy, including in a subset of tumors downregulating MHC class I expression.

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  • In metastatic melanoma treated with anti-PD-1 therapy, clinical response is associated with higher densities of tumoral and peritumoral NK cells displaying a cytotoxic phenotype (CD16+ and granzyme B+), closer localization to tumor cells, and enhanced NK cytotoxicity following PD-1 blockade ex vivo.

    “In metastatic melanoma treated with anti–PD-1 therapy, clinical response is associated with higher densities of tumoral and peritumoral NK cells displaying a cytotoxic phenotype (CD16+ and granzyme B+), closer localization to tumor cells, and enhanced NK cytotoxicity following PD-1 blockade ex vivo (49).”

    From PathTIGR: A pathway topology-informed graph representation learning framework for immunotherapy response prediction (2026) · cites this paper as [49]

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  1. Barth A, 1995, J Am Coll Surg, 181, 193
  2. Pallmer K, 2016, Frontiers in Immunology, 7:251

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Metadata

Authors
Lee, H., Quek, C., Silva, I., Tasker, A., Batten, M., Rizos, H., Lim, S. Y., Nur Gide, T., Shang, P., Attrill, G. H., Madore, J., Edwards, J., Carlino, M. S., Guminski, A., Saw, R. P. M., Thompson, J. F., Ferguson, P. M., Palendira, U., Menzies, A. M., Long, G. V., Scolyer, R. A., & Wilmott, J. S.
Affiliations
  • The University of Sydney (AU)
  • Melanoma Institute Australia, The University of Sydney, Sydney, NSW, Australia
  • Macquarie University (AU)
Corresponding author
Wilmott, James S.
Venue
OncoImmunology
Published
2018-10-31
Volume
8
Issue
2
Pages
e1537581
ISSN
  • 2162-4011 (ISSN-L)
  • 2162-402X
OpenAlex
W2899141307
Cited by
115
References
22
Citations by year
2026: 4 · 2025: 7 · 2024: 11 · 2023: 23 · 2022: 19 · 2021: 28 · 2020: 19 · 2019: 4
FWCI
4.79
Type
journal article
Language
en
Open access
Locations
  • OncoImmunology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Health and Medical Research Council (APP1111678, APP1141295, APP1093017)
Topics
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Cell Function and Interaction
  • Health Sciences › Medicine › Oncology › Cutaneous Melanoma Detection and Management
Keywords
natural killer cells, metastatic melanoma, anti-PD-1 therapy, immune checkpoint blockade, treatment response prediction, MHC class I downregulation, tumor-infiltrating immune cells, NK cell cytotoxicity, CD16, granzyme B, tumor immune microenvironment, tumor immunosuppression, lymph node metastasis

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