The PD-L1/PD-1 Axis Blocks Neutrophil Cytotoxicity in Cancer

The PD-L1/PD-1 axis mediates immune tolerance and promotes tumor growth and progression via the inhibition of anti-tumor immunity. Blocking the interaction between PD-L1 and PD-1 was clinically shown to be beneficial in maintaining the anti-tumor functions of the adaptive immune system. Still, the consequences of blocking the PD-L1/PD-1 axis on innate immune responses remain largely unexplored. In this context, neutrophils were shown to consist of distinct subpopulations, which possess either pro- or anti-tumor properties. PD-L1-expressing neutrophils are considered pro-tumor as they are able to suppress cytotoxic T cells and are propagated with disease progression. That said, we found that PD-L1 expression is not limited to tumor promoting neutrophils, but is also evident in anti-tumor neutrophils. We show that neutrophil cytotoxicity is effectively and efficiently blocked by tumor cell-expressed PD-1. Furthermore, the blocking of either neutrophil PD-L1 or tumor cell PD-1 maintains neutrophil cytotoxicity. Importantly, we show that tumor cell PD-1 blocks neutrophil cytotoxicity and promotes tumor growth via a mechanism independent of adaptive immunity. Taken together, these findings highlight the therapeutic potential of enhancing anti-tumor innate immune responses via blocking of the PD-L1/PD-1 axis.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:10

Enthalten in:

Cells - 10(2021), 6 vom: 15. Juni

Sprache:

Englisch

Beteiligte Personen:

Yajuk, Olga [VerfasserIn]
Baron, Maya [VerfasserIn]
Toker, Sapir [VerfasserIn]
Zelter, Tamir [VerfasserIn]
Fainsod-Levi, Tanya [VerfasserIn]
Granot, Zvi [VerfasserIn]

Links:

Volltext

Themen:

B7-H1 Antigen
Cancer
Cd274 protein, mouse
Journal Article
Metastasis
Neutrophils
PD-1
PD-L1
Pdcd1 protein, mouse
Programmed Cell Death 1 Receptor
Research Support, Non-U.S. Gov't

Anmerkungen:

Date Completed 01.11.2021

Date Revised 01.11.2021

published: Electronic

Citation Status MEDLINE

doi:

10.3390/cells10061510

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM327506326