Clinical implications of heterogeneity in PD-L1 immunohistochemical detection in hepatocellular carcinoma: the Blueprint-HCC study

David J. Pinato, Francesco A. Mauri, Paolo Spina, Owen Cain, Abdul Siddique, Robert Goldin, Stephane Victor, Corinna Pizio, Ayse U. Akarca, Renzo L. Boldorini, Luca Mazzucchelli, James R.M. Black, Shishir Shetty, Teresa Marafioti, Rohini Sharma

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

Programmed cell death ligand-1 immunohistochemical detection (PD-L1 IHC) is a putative predictor of response to PD-1/PD-L1-targeted checkpoint inhibitors. However, there is no gold standard assay in hepatocellular carcinoma (HCC). We evaluated 5 PD-L1 IHC assay platforms (E1LN3, 28-8, 22c3, SP263 and SP142) in 100 HCCs reporting PD-L1 expression in malignant (M) and tumour-infiltrating immune cells (TICs) and non-tumorous cirrhotic tissues (NTICs). We found substantial inter-assay heterogeneity in detecting PD-L1 expression in M (R2 = 0.080–0.921), TICs (Cohen’s κ = 0.175–0.396) and NTICs (κ = 0.004–0.505). Such diversity may impact on the reliability and reproducibility of PD-L1 IHC assays as a predictor of response to immune checkpoint inhibitors.

Lingua originaleInglese
pagine (da-a)1033-1036
Numero di pagine4
RivistaBritish Journal of Cancer
Volume120
Numero di pubblicazione11
DOI
Stato di pubblicazionePubblicato - 28 mag 2019

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