Phenotypic and Proteomic Analysis Identifies Hallmarks of Blood Circulating Extracellular Vesicles in NSCLC Responders to Immune Checkpoint Inhibitors

被引：34

作者：

Brocco, Davide ^{[1
]}

Lanuti, Paola ^{[2
,3
]}

Pieragostino, Damiana ^{[3
,4
]}

Cufaro, Maria Concetta ^{[1
,3
]}

Simeone, Pasquale ^{[2
,3
]}

Bologna, Giuseppina ^{[2
,3
]}

Di Marino, Pietro ^{[5
]}

De Tursi, Michele ^{[4
]}

Grassadonia, Antonino ^{[4
]}

Irtelli, Luciana ^{[5
]}

De Lellis, Laura ^{[1
]}

Veschi, Serena ^{[1
]}

Florio, Rosalba ^{[1
]}

Federici, Luca ^{[3
,4
]}

Marchisio, Marco ^{[2
,3
]}

Miscia, Sebastiano ^{[2
,3
]}

Cama, Alessandro ^{[1
]}

Tinari, Nicola ^{[6
]}

Del Boccio, Piero ^{[1
,3
]}

机构：

[1] Univ G dAnnunzio, Dept Pharm, I-66100 Chieti, Italy

[2] Univ G dAnnunzio, Dept Med & Aging Sci, I-66100 Chieti, Italy

[3] Univ G dAnnunzio, Ctr Adv Studies & Technol CAST, I-66100 Chieti, Italy

[4] Univ G dAnnunzio, Dept Innovat Technol Med & Dent, I-66100 Chieti, Italy

[5] SS Annunziata Hosp, Clin Oncol Unit, I-66100 Chieti, Italy

[6] Univ G dAnnunzio, Dept Med Oral & Biotechnol Sci, I-66100 Chieti, Italy

来源：

CANCERS | 2021年 / 13卷 / 04期

关键词：

extracellular vesicles; biomarker; cancer immunotherapy; non-small cell lung cancer; immune checkpoint inhibitors; TUMOR ANGIOGENESIS; FLOW-CYTOMETRY; EXOSOMES; IMMUNOTHERAPY; EXPRESSION; MELANOMA; CANCER; CELLS; CD31;

D O I：

10.3390/cancers13040585

中图分类号：

R73 [肿瘤学];

学科分类号：

100214 ;

摘要：

Simple Summary Purpose of this study was to investigate the prognostic and predictive role of blood circulating extracellular vesicles (EVs) in patients with advanced non-small cell lung cancer treated with immunotherapy. A newly optimized flow cytometry protocol was applied for identification and subtyping of blood circulating EVs in a total cohort of 59 NSCLC patients, which included 31 patients treated with anti-PD-1/PD-L1 agents and 28 patients treated with traditional chemotherapy. Our results show that pre-treatment concentration of blood circulating endothelial-derived EVs was correlated with overall survival and clinical response in patients treated with immunotherapy. Additionally, proteomic analysis of purified blood circulating EVs indicated differences in EV protein cargo between responders and non-responders to immunotherapy. These findings may pave the way to the identification of novel immunotherapy biomarkers in patients with advanced NSCLC. Immune checkpoint inhibitors (ICIs) induce durable clinical responses only in a subset of advanced non-small cell lung cancer (NSCLC) patients. There is a need to identify mechanisms of ICI resistance and immunotherapy biomarkers to improve clinical benefit. In this study, we evaluated the prognostic and predictive value of circulating endothelial and leukocyte-derived extracellular vesicles (EV) in patients with advanced NSCLC treated with anti-PD-1/PD-L1 agents. In addition, the relationship between total blood circulating EV proteome and response to ICIs was investigated. An optimized flow cytometry method was employed for the identification and subtyping of blood circulating EVs in 59 patients with advanced NSCLC. Blood samples were collected from patients receiving anti-PD-1/PD-L1 inhibitors (n = 31) or chemotherapy (n = 28). An exploratory proteomic analysis of sorted blood EVs was conducted in a subset of patients. Our results show that a low blood concentration of circulating endothelial-derived EVs before treatment was strongly associated to longer overall survival (p = 0.0004) and higher disease control rate (p = 0.045) in patients treated with ICIs. Interestingly, shotgun proteomics revealed that EVs of responders to anti-PD-1 therapy had a specific protein cargo before treatment. In addition, EV protein cargo was specifically modulated during immunotherapy. We identified a previously unknown association between circulating endothelial-derived extracellular vesicle concentration and immunotherapy-related clinical outcomes. We also observed differences in circulating extracellular vesicle proteome according to anti-PD-1-based treatment response in NSCLC patients. Overall, these results may contribute to the identification of novel circulating biomarkers for rational immunotherapy approaches in patients affected by NSCLC.

引用

页码：1 / 16

页数：16

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