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Frequency of circulating CD8+CD73+T cells is associated with survival in nivolumab-treated melanoma patients.


ABSTRACT: BACKGROUND:PD-1 blocking agents, such as nivolumab, have demonstrated clear anti-tumor effects and clinical benefits in a subset of patients with advanced malignancies. Nonetheless, more efforts are needed to identify reliable biomarkers for outcome, to correctly select patients who will benefit from anti-PD-1 treatment. The aim of this study was to investigate the role of peripheral CD8+T cells expressing CD73, involved in the generation of the immune suppressive molecule adenosine, in predicting outcome after nivolumab treatment in advanced melanoma patients. METHODS:PBMCs from 100 melanoma patients treated with nivolumab were collected at National Cancer Institute "G. Pascale" of Naples. Frequencies of CD8+ lymphocytes phenotypes were assessed by flow cytometry at baseline before nivolumab treatment, along with clinical characteristics and blood count parameters. Healthy controls (n?=?20) were also analysed. Percentages of baseline T cells expressing PD-1 and CD73 were correlated with outcome after nivolumab treatment. RESULTS:Melanoma patients presented a lower frequency of total circulating CD8+ lymphocytes than control subjects (p?=?0.008). Patients with low baseline percentage of circulating CD8+PD-1+CD73+?lymphocytes (

SUBMITTER: Capone M 

PROVIDER: S-EPMC7065327 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature

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<h4>Background</h4>PD-1 blocking agents, such as nivolumab, have demonstrated clear anti-tumor effects and clinical benefits in a subset of patients with advanced malignancies. Nonetheless, more efforts are needed to identify reliable biomarkers for outcome, to correctly select patients who will benefit from anti-PD-1 treatment. The aim of this study was to investigate the role of peripheral CD8+T cells expressing CD73, involved in the generation of the immune suppressive molecule adenosine, in  ...[more]

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