What Do We Have to Know about PD-L1 Expression in Prostate Cancer? A Systematic Literature Review. Part 1: Focus on Immunohistochemical Results with Discussion of Pre-Analytical and Interpretation Variables

Immunotherapy targeting the PD-1–PD-L1 axis yielded good results in treating different immunologically ‘‘hot’’ tumors. A phase II study revealed good therapeutic activity of pembrolizumab in selected prostatic carcinoma (PC)-patients. We performed a systematic literature review (PRISMA guidelines),...

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Autores principales: Andrea Palicelli, Martina Bonacini, Stefania Croci, Cristina Magi-Galluzzi, Sofia Cañete-Portillo, Alcides Chaux, Alessandra Bisagni, Eleonora Zanetti, Dario De Biase, Beatrice Melli, Francesca Sanguedolce, Moira Ragazzi, Maria Paola Bonasoni, Alessandra Soriano, Stefano Ascani, Maurizio Zizzo, Carolina Castro Ruiz, Antonio De Leo, Guido Giordano, Matteo Landriscina, Giuseppe Carrieri, Luigi Cormio, Daniel M. Berney, Daniel Athanazio, Jatin Gandhi, Alberto Cavazza, Giacomo Santandrea, Alessandro Tafuni, Magda Zanelli
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Publicado: MDPI AG 2021
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spelling oai:doaj.org-article:bb8e29accbd74f43b44ae3429430e2c62021-11-25T17:12:13ZWhat Do We Have to Know about PD-L1 Expression in Prostate Cancer? A Systematic Literature Review. Part 1: Focus on Immunohistochemical Results with Discussion of Pre-Analytical and Interpretation Variables10.3390/cells101131662073-4409https://doaj.org/article/bb8e29accbd74f43b44ae3429430e2c62021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4409/10/11/3166https://doaj.org/toc/2073-4409Immunotherapy targeting the PD-1–PD-L1 axis yielded good results in treating different immunologically ‘‘hot’’ tumors. A phase II study revealed good therapeutic activity of pembrolizumab in selected prostatic carcinoma (PC)-patients. We performed a systematic literature review (PRISMA guidelines), which analyzes the immunohistochemical expression of PD-L1 in human PC samples and highlights the pre-analytical and interpretation variables. Interestingly, 29% acinar PCs, 7% ductal PCs, and 46% neuroendocrine carcinomas/tumors were PD-L1+ on immunohistochemistry. Different scoring methods or cut-off criteria were applied on variable specimen-types, evaluating tumors showing different clinic-pathologic features. The positivity rate of different PD-L1 antibody clones in tumor cells ranged from 3% (SP142) to 50% (ABM4E54), excluding the single case tested for RM-320. The most tested clone was E1L3N, followed by 22C3 (most used for pembrolizumab eligibility), SP263, SP142, and 28-8, which gave the positivity rates of 35%, 11–41% (depending on different scoring systems), 6%, 3%, and 15%, respectively. Other clones were tested in <200 cases. The PD-L1 positivity rate was usually higher in tumors than benign tissues. It was higher in non-tissue microarray specimens (41–50% vs. 15%), as PC cells frequently showed heterogenous or focal PD-L1-staining. PD-L1 was expressed by immune or stromal cells in 12% and 69% cases, respectively. Tumor heterogeneity, inter-institutional preanalytics, and inter-observer interpretation variability may account for result biases.Andrea PalicelliMartina BonaciniStefania CrociCristina Magi-GalluzziSofia Cañete-PortilloAlcides ChauxAlessandra BisagniEleonora ZanettiDario De BiaseBeatrice MelliFrancesca SanguedolceMoira RagazziMaria Paola BonasoniAlessandra SorianoStefano AscaniMaurizio ZizzoCarolina Castro RuizAntonio De LeoGuido GiordanoMatteo LandriscinaGiuseppe CarrieriLuigi CormioDaniel M. BerneyDaniel AthanazioJatin GandhiAlberto CavazzaGiacomo SantandreaAlessandro TafuniMagda ZanelliMDPI AGarticlePD-L1prostatecanceradenocarcinomaimmunohistochemistrytarget-therapyBiology (General)QH301-705.5ENCells, Vol 10, Iss 3166, p 3166 (2021)
institution DOAJ
collection DOAJ
language EN
topic PD-L1
prostate
cancer
adenocarcinoma
immunohistochemistry
target-therapy
Biology (General)
QH301-705.5
spellingShingle PD-L1
prostate
cancer
adenocarcinoma
immunohistochemistry
target-therapy
Biology (General)
QH301-705.5
Andrea Palicelli
Martina Bonacini
Stefania Croci
Cristina Magi-Galluzzi
Sofia Cañete-Portillo
Alcides Chaux
Alessandra Bisagni
Eleonora Zanetti
Dario De Biase
Beatrice Melli
Francesca Sanguedolce
Moira Ragazzi
Maria Paola Bonasoni
Alessandra Soriano
Stefano Ascani
Maurizio Zizzo
Carolina Castro Ruiz
Antonio De Leo
Guido Giordano
Matteo Landriscina
Giuseppe Carrieri
Luigi Cormio
Daniel M. Berney
Daniel Athanazio
Jatin Gandhi
Alberto Cavazza
Giacomo Santandrea
Alessandro Tafuni
Magda Zanelli
What Do We Have to Know about PD-L1 Expression in Prostate Cancer? A Systematic Literature Review. Part 1: Focus on Immunohistochemical Results with Discussion of Pre-Analytical and Interpretation Variables
description Immunotherapy targeting the PD-1–PD-L1 axis yielded good results in treating different immunologically ‘‘hot’’ tumors. A phase II study revealed good therapeutic activity of pembrolizumab in selected prostatic carcinoma (PC)-patients. We performed a systematic literature review (PRISMA guidelines), which analyzes the immunohistochemical expression of PD-L1 in human PC samples and highlights the pre-analytical and interpretation variables. Interestingly, 29% acinar PCs, 7% ductal PCs, and 46% neuroendocrine carcinomas/tumors were PD-L1+ on immunohistochemistry. Different scoring methods or cut-off criteria were applied on variable specimen-types, evaluating tumors showing different clinic-pathologic features. The positivity rate of different PD-L1 antibody clones in tumor cells ranged from 3% (SP142) to 50% (ABM4E54), excluding the single case tested for RM-320. The most tested clone was E1L3N, followed by 22C3 (most used for pembrolizumab eligibility), SP263, SP142, and 28-8, which gave the positivity rates of 35%, 11–41% (depending on different scoring systems), 6%, 3%, and 15%, respectively. Other clones were tested in <200 cases. The PD-L1 positivity rate was usually higher in tumors than benign tissues. It was higher in non-tissue microarray specimens (41–50% vs. 15%), as PC cells frequently showed heterogenous or focal PD-L1-staining. PD-L1 was expressed by immune or stromal cells in 12% and 69% cases, respectively. Tumor heterogeneity, inter-institutional preanalytics, and inter-observer interpretation variability may account for result biases.
format article
author Andrea Palicelli
Martina Bonacini
Stefania Croci
Cristina Magi-Galluzzi
Sofia Cañete-Portillo
Alcides Chaux
Alessandra Bisagni
Eleonora Zanetti
Dario De Biase
Beatrice Melli
Francesca Sanguedolce
Moira Ragazzi
Maria Paola Bonasoni
Alessandra Soriano
Stefano Ascani
Maurizio Zizzo
Carolina Castro Ruiz
Antonio De Leo
Guido Giordano
Matteo Landriscina
Giuseppe Carrieri
Luigi Cormio
Daniel M. Berney
Daniel Athanazio
Jatin Gandhi
Alberto Cavazza
Giacomo Santandrea
Alessandro Tafuni
Magda Zanelli
author_facet Andrea Palicelli
Martina Bonacini
Stefania Croci
Cristina Magi-Galluzzi
Sofia Cañete-Portillo
Alcides Chaux
Alessandra Bisagni
Eleonora Zanetti
Dario De Biase
Beatrice Melli
Francesca Sanguedolce
Moira Ragazzi
Maria Paola Bonasoni
Alessandra Soriano
Stefano Ascani
Maurizio Zizzo
Carolina Castro Ruiz
Antonio De Leo
Guido Giordano
Matteo Landriscina
Giuseppe Carrieri
Luigi Cormio
Daniel M. Berney
Daniel Athanazio
Jatin Gandhi
Alberto Cavazza
Giacomo Santandrea
Alessandro Tafuni
Magda Zanelli
author_sort Andrea Palicelli
title What Do We Have to Know about PD-L1 Expression in Prostate Cancer? A Systematic Literature Review. Part 1: Focus on Immunohistochemical Results with Discussion of Pre-Analytical and Interpretation Variables
title_short What Do We Have to Know about PD-L1 Expression in Prostate Cancer? A Systematic Literature Review. Part 1: Focus on Immunohistochemical Results with Discussion of Pre-Analytical and Interpretation Variables
title_full What Do We Have to Know about PD-L1 Expression in Prostate Cancer? A Systematic Literature Review. Part 1: Focus on Immunohistochemical Results with Discussion of Pre-Analytical and Interpretation Variables
title_fullStr What Do We Have to Know about PD-L1 Expression in Prostate Cancer? A Systematic Literature Review. Part 1: Focus on Immunohistochemical Results with Discussion of Pre-Analytical and Interpretation Variables
title_full_unstemmed What Do We Have to Know about PD-L1 Expression in Prostate Cancer? A Systematic Literature Review. Part 1: Focus on Immunohistochemical Results with Discussion of Pre-Analytical and Interpretation Variables
title_sort what do we have to know about pd-l1 expression in prostate cancer? a systematic literature review. part 1: focus on immunohistochemical results with discussion of pre-analytical and interpretation variables
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/bb8e29accbd74f43b44ae3429430e2c6
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