IL-17A-producing CD8+ T cells promote PDAC via induction of inflammatory cancer-associated fibroblasts

Objective Pancreatic ductal adenocarcinoma (PDAC) is characterised by an abundant desmoplastic stroma composed of cancer-associated fibroblasts (CAF) and interspersed immune cells. A non-canonical CD8+ T-cell subpopulation producing IL-17A (Tc17) promotes autoimmunity and has been identified in tumo...

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Hauptverfasser: Picard, Felix Simon Ruben (VerfasserIn) , Lutz, Veronika (VerfasserIn) , Brichkina, Anna (VerfasserIn) , Neuhaus, Felix (VerfasserIn) , Ruckenbrod, Teresa (VerfasserIn) , Hupfer, Anna (VerfasserIn) , Raifer, Hartmann (VerfasserIn) , Klein, Matthias (VerfasserIn) , Bopp, Tobias (VerfasserIn) , Pfefferle, Petra Ina (VerfasserIn) , Savai, Rajkumar (VerfasserIn) , Prinz, Immo (VerfasserIn) , Waisman, Ari (VerfasserIn) , Moos, Sonja (VerfasserIn) , Chang, Hyun-Dong (VerfasserIn) , Heinrich, Stefan (VerfasserIn) , Bartsch, Detlef K. (VerfasserIn) , Buchholz, Malte (VerfasserIn) , Singh, Shiv (VerfasserIn) , Tu, Mengyu (VerfasserIn) , Klein, Lukas (VerfasserIn) , Bauer, Christian (VerfasserIn) , Liefke, Robert (VerfasserIn) , Burchert, Andreas (VerfasserIn) , Chung, Ho-Ryun (VerfasserIn) , Mayer, Philipp (VerfasserIn) , Gress, Thomas M. (VerfasserIn) , Lauth, Matthias (VerfasserIn) , Gaida, Matthias (VerfasserIn) , Huber, Magdalena (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 9 February 2023
In: Gut
Year: 2023, Jahrgang: 72, Heft: 8, Pages: 1510-1522
ISSN:1468-3288
DOI:10.1136/gutjnl-2022-327855
Online-Zugang:Resolving-System, kostenfrei, Volltext: https://doi.org/10.1136/gutjnl-2022-327855
Verlag, kostenfrei, Volltext: https://gut.bmj.com/content/early/2023/02/09/gutjnl-2022-327855
Volltext
Verfasserangaben:Felix Simon Ruben Picard, Veronika Lutz, Anna Brichkina, Felix Neuhaus, Teresa Ruckenbrod, Anna Hupfer, Hartmann Raifer, Matthias Klein, Tobias Bopp, Petra Ina Pfefferle, Rajkumar Savai, Immo Prinz, Ari Waisman, Sonja Moos, Hyun-Dong Chang, Stefan Heinrich, Detlef K. Bartsch, Malte Buchholz, Shiv Singh, Mengyu Tu, Lukas Klein, Christian Bauer, Robert Liefke, Andreas Burchert, Ho-Ryun Chung, Philipp Mayer, Thomas M. Gress, Matthias Lauth, Matthias Gaida, Magdalena Huber

MARC

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520 |a Objective Pancreatic ductal adenocarcinoma (PDAC) is characterised by an abundant desmoplastic stroma composed of cancer-associated fibroblasts (CAF) and interspersed immune cells. A non-canonical CD8+ T-cell subpopulation producing IL-17A (Tc17) promotes autoimmunity and has been identified in tumours. Here, we evaluated the Tc17 role in PDAC. - Design Infiltration of Tc17 cells in PDAC tissue was correlated with patient overall survival and tumour stage. Wild-type (WT) or Il17ra-/- quiescent pancreatic stellate cells (qPSC) were exposed to conditional media obtained from Tc17 cells (Tc17-CM); moreover, co-culture of Tc17-CM-induced inflammatory (i)CAF (Tc17-iCAF) with tumour cells was performed. IL-17A/F-, IL-17RA-, RAG1-deficient and Foxn1nu/nu mice were used to study the Tc17 role in subcutaneous and orthotopic PDAC mouse models. - Results Increased abundance of Tc17 cells highly correlated with reduced survival and advanced tumour stage in PDAC. Tc17-CM induced iCAF differentiation as assessed by the expression of iCAF-associated genes via synergism of IL-17A and TNF. Accordingly, IL-17RA controlled the responsiveness of qPSC to Tc17-CM. Pancreatic tumour cells co-cultured with Tc17-iCAF displayed enhanced proliferation and increased expression of genes implicated in proliferation, metabolism and protection from apoptosis. Tc17-iCAF accelerated growth of mouse and human tumours in Rag1-/- and Foxn1nu/nu mice, respectively. Finally, Il17ra-expressed by fibroblasts was required for Tc17-driven tumour growth in vivo. - Conclusions We identified Tc17 as a novel protumourigenic CD8+ T-cell subtype in PDAC, which accelerated tumour growth via IL-17RA-dependent stroma modification. We described a crosstalk between three cell types, Tc17, fibroblasts and tumour cells, promoting PDAC progression, which resulted in poor prognosis for patients. 
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650 4 |a cytokines 
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650 4 |a inflammatory mechanisms 
650 4 |a pancreatic cancer 
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