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Cited by 374

The DOI matches its Crossref record; 27 of the 27 references it cites were found in a registry or an index.

Frequent expression of PD‐L1 on circulating breast cancer cells

Open access
Mazel, Martine, Jacot, William, Pantel, Klaus, Bartkowiak, Kai, Topart, Delphine, Cayrefourcq, Laure, Rossille, Delphine, Maudelonde, Thierry, Fest, Thierry, Alix-Panabières, Catherine·2015·Molecular Oncology

Abstract

Immune checkpoint regulators such as PD‐L1 have become exciting new therapeutic targets leading to long lasting remissions in patients with advanced malignancies. However, in view of the remarkable costs and the toxicity profiles of these therapies, predictive biomarkers able to discriminate responders from non‐responders are urgently needed. In the present paper, we provide evidence that PD‐L1 is frequently expressed on metastatic cells circulating in the blood of hormone receptor‐positive, HER2‐negative breast cancer patients. We performed western blot, flow cytometry and immunocytochemical analyses to demonstrate the specificity of the PDL1 antibody used in our study and established immunoscores for PDL1 expression on single tumor cells. We then selected sixteen patients with circulating tumor cells (CTCs) using the CellSearch® system and found PD‐L1(+) CTCs in 11 patients (68.8%). The fraction of PD‐L1(+) CTCs varied from 0.2 to 100% in individual patients. This is the first report demonstrating the expression of PD‐L1 on CTCs. The established CTC/PD‐L1 assay can be used for liquid biopsy in future clinical trials for stratification and monitoring of cancer patients undergoing immune checkpoint blockade.

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Metadata

Authors
Mazel, M., Jacot, W., Pantel, K., Bartkowiak, K., Topart, D., Cayrefourcq, L., Rossille, D., Maudelonde, T., Fest, T., & Alix-Panabières, C.
Venue
Molecular Oncology
Publisher
Wiley
Published
2015-06-09
Volume
9
Issue
9
Pages
1773-1782
ISSN
  • 1574-7891 (ISSN-L)
  • 1878-0261
OpenAlex
W1959742401
Cited by
374
References
27
FWCI
15.73
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Frequent expression of PD‐L1 on circulating breast cancer cells. https://app.cochat.ai/papers/10.1016/j.molonc.2015.05.009
The paper
Mazel, M., Jacot, W., Pantel, K., Bartkowiak, K., Topart, D., Cayrefourcq, L., Rossille, D., Maudelonde, T., Fest, T., & Alix-Panabières, C. (2015). Frequent expression of PD‐L1 on circulating breast cancer cells. Molecular Oncology. https://doi.org/10.1016/j.molonc.2015.05.009

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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