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Published in: Journal of Experimental & Clinical Cancer Research 1/2021

01-12-2021 | Metastasis | Research

The immune cell landscape of metastatic uveal melanoma correlates with overall survival

Authors: Anna Tosi, Rocco Cappellesso, Angelo Paolo Dei Tos, Valentina Rossi, Camillo Aliberti, Jacopo Pigozzo, Alessio Fabozzi, Marta Sbaraglia, Stella Blandamura, Paola Del Bianco, Vanna Chiarion-Sileni, Antonio Rosato

Published in: Journal of Experimental & Clinical Cancer Research | Issue 1/2021

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Abstract

Background

Uveal melanoma (UM) represents the most common primary intra-ocular malignancy in adults. Up to 50% of the patients develop distant metastases within 10 years from diagnosis, with the liver as the most common site. Upon metastatization, life expectancy strongly reduces and immune checkpoint inhibitors that prove effective in cutaneous melanoma do not modify clinical outcome. To date, few studies have focused on deciphering the immunomodulatory features of metastatic UM microenvironment, and there are no prognostic models for clinical use. This highlights the urgent need to understand the delicate interplay between tumor and immune cells acting at the site of metastasis.

Methods

We collected a patient cohort comprising 21 metastatic UM patients. Hepatic and extra-hepatic UM metastasis samples were studied by multiplex immunofluorescence to assess the tumor immune cell composition. Quantitative analyses were performed to correlate immune cell densities with treatment response, metastasis site and patient survival.

Results

Compared to patients with progressive disease, those with controlled disease had a higher intra-tumoral/peritumoral ratio of CD8 + Granzyme B+ cells, higher density of intra-tumoral CD8+ cytotoxic T lymphocytes (CTL) and an increased percentage of UM cells in close proximity to T lymphocytes, reflecting a role of tumor-killing T cells in the disease. In liver metastases (LM), the intra-tumoral densities of CD163+ tumor-associated macrophages (TAM) and of total CD8+ T cells were higher than in extra-hepatic UM metastases, but the percentage of Granzyme B+ CTL was lower. Moreover, LM displayed more UM cells adjacent to both CTL and TAM, and also more T cells in proximity to TAM, all signs of an impaired immune response. The percentage of activated CTL within the tumor represented a prognostic indicator, as patients with a higher intra-tumoral percentage of CD8 + Granzyme B+ cells had the better outcome. A temptative Immunoscore was generated and proved capable to stratify patients with improved survival. Finally, CD4 + FoxP3+ T cells appeared a crucial population for response to immunotherapy.

Conclusion

The results of this study underly the clinical relevance and functional importance of composition and localization of antitumor effector cells for the progression of UM metastasis.
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Literature
27.
go back to reference Khoja L, Atenafu EG, Suciu S, Leyvraz S, Sato T, Marshall E, et al. Meta-analysis in metastatic uveal melanoma to determine progression free and overall survival benchmarks: an international rare cancers initiative (IRCI) ocular melanoma study. Ann Oncol. Aug. 2019;30(8):1370–80. https://doi.org/10.1093/annonc/mdz176.CrossRefPubMed Khoja L, Atenafu EG, Suciu S, Leyvraz S, Sato T, Marshall E, et al. Meta-analysis in metastatic uveal melanoma to determine progression free and overall survival benchmarks: an international rare cancers initiative (IRCI) ocular melanoma study. Ann Oncol. Aug. 2019;30(8):1370–80. https://​doi.​org/​10.​1093/​annonc/​mdz176.CrossRefPubMed
32.
go back to reference Shah W, Yan X, Jing L, Zhou Y, Chen H, Wang Y. A reversed CD4/CD8 ratio of tumor-infiltrating lymphocytes and a high percentage of CD4+FOXP3+ regulatory T cells are significantly associated with clinical outcome in squamous cell carcinoma of the cervix. Cell Mol Immunol. 2011;8(1):59–66. https://doi.org/10.1038/cmi.2010.56.CrossRefPubMed Shah W, Yan X, Jing L, Zhou Y, Chen H, Wang Y. A reversed CD4/CD8 ratio of tumor-infiltrating lymphocytes and a high percentage of CD4+FOXP3+ regulatory T cells are significantly associated with clinical outcome in squamous cell carcinoma of the cervix. Cell Mol Immunol. 2011;8(1):59–66. https://​doi.​org/​10.​1038/​cmi.​2010.​56.CrossRefPubMed
43.
45.
Metadata
Title
The immune cell landscape of metastatic uveal melanoma correlates with overall survival
Authors
Anna Tosi
Rocco Cappellesso
Angelo Paolo Dei Tos
Valentina Rossi
Camillo Aliberti
Jacopo Pigozzo
Alessio Fabozzi
Marta Sbaraglia
Stella Blandamura
Paola Del Bianco
Vanna Chiarion-Sileni
Antonio Rosato
Publication date
01-12-2021
Publisher
BioMed Central
Published in
Journal of Experimental & Clinical Cancer Research / Issue 1/2021
Electronic ISSN: 1756-9966
DOI
https://doi.org/10.1186/s13046-021-01947-1

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