Title
PDL1 expression in inflammatory breast cancer is frequent and predicts for the pathological response to chemotherapy PDL1 expression in inflammatory breast cancer is frequent and predicts for the pathological response to chemotherapy
Author
Faculty/Department
Faculty of Medicine and Health Sciences
Publication type
article
Publication
Albany, N.Y :Impact Journals ,
Subject
Biology
Human medicine
Source (journal)
Oncotarget. - Albany, N.Y, 2010, currens
Volume/pages
6(2015) :15 , p. 13506-13519
ISSN
1949-2553
ISI
000359009400048
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We retrospectively analyzed PDL1 mRNA expression in 306 breast cancer samples, including 112 samples of an aggressive form, inflammatory breast cancer (IBC). PDL1 expression was heterogeneous, but was higher in IBC than in non-IBC. Compared to normal breast samples, PDL1 was overexpressed in 38% of IBC. In IBC, PDL1 overexpression was associated with estrogen receptor-negative status, basal and ERBB2-enriched aggressive subtypes, and clinico-biological signs of antitumor T-cell cytotoxic response. PDL1 overexpression was associated with better pathological response to chemotherapy, independently of histo-clinical variables and predictive gene expression signatures. No correlation was found with metastasis-free and overall specific survivals. In conclusion, PDL1 overexpression in IBC correlated with better response to chemotherapy. This seemingly counterintuitive correlation between expression of an immunosuppressive molecule and improved therapeutic response may be resolved if PDL1 expression is viewed as a surrogate marker of a strong antitumor immune response among patients treated with immunogenic chemotherapy. In such patients, PDL1 inhibition could protect activated T-cells or reactivate inhibited T-cells and improve the therapeutic response, notably when associated with immunogenic chemotherapy.
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Full text (open access)
https://repository.uantwerpen.be/docman/irua/043a06/127235.pdf
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