Immune cell dynamics deconvoluted by single-cell RNA sequencing in normothermic machine perfusion of the liver

T. Hautz, S. Salcher, M. Fodor, G. Sturm, S. Ebner, A. Mair, M. Trebo, G. Untergasser, S. Sopper, B. Cardini, A. Martowicz, J. Hofmann, S. Daum, M. Kalb, T. Resch, F. Krendl, A. Weissenbacher, G. Otarashvili, P. Obrist, B. Zelger, D. Öfner, Z. Trajanoski, J. Troppmair, R. Oberhuber, A. Pircher, D. Wolf () and S. Schneeberger ()
Additional contact information
T. Hautz: Medical University of Innsbruck
S. Salcher: Medical University of Innsbruck
M. Fodor: Medical University of Innsbruck
G. Sturm: Medical University of Innsbruck
S. Ebner: Medical University of Innsbruck
A. Mair: Medical University of Innsbruck
M. Trebo: Medical University of Innsbruck
G. Untergasser: Medical University of Innsbruck
S. Sopper: Medical University of Innsbruck
B. Cardini: Medical University of Innsbruck
A. Martowicz: Medical University of Innsbruck
J. Hofmann: Medical University of Innsbruck
S. Daum: Medical University of Innsbruck
M. Kalb: Medical University of Innsbruck
T. Resch: Medical University of Innsbruck
F. Krendl: Medical University of Innsbruck
A. Weissenbacher: Medical University of Innsbruck
G. Otarashvili: Medical University of Innsbruck
P. Obrist: Tyrolpath Obrist Brunhuber GmbH
B. Zelger: Medical University of Innsbruck
D. Öfner: Medical University of Innsbruck
Z. Trajanoski: Medical University of Innsbruck
J. Troppmair: Medical University of Innsbruck
R. Oberhuber: Medical University of Innsbruck
A. Pircher: Medical University of Innsbruck
D. Wolf: Medical University of Innsbruck
S. Schneeberger: Medical University of Innsbruck

Nature Communications, 2023, vol. 14, issue 1, 1-18

Abstract: Abstract Normothermic machine perfusion (NMP) has emerged as an innovative organ preservation technique. Developing an understanding for the donor organ immune cell composition and its dynamic changes during NMP is essential. We aimed for a comprehensive characterization of immune cell (sub)populations, cell trafficking and cytokine release during liver NMP. Single-cell transcriptome profiling of human donor livers prior to, during NMP and after transplantation shows an abundance of CXC chemokine receptor 1+/2+ (CXCR1+/CXCR2+) neutrophils, which significantly decreased during NMP. This is paralleled by a large efflux of passenger leukocytes with neutrophil predominance in the perfusate. During NMP, neutrophils shift from a pro-inflammatory state towards an aged/chronically activated/exhausted phenotype, while anti-inflammatory/tolerogenic monocytes/macrophages are increased. We herein describe the dynamics of the immune cell repertoire, phenotypic immune cell shifts and a dominance of neutrophils during liver NMP, which potentially contribute to the inflammatory response. Our findings may serve as resource to initiate future immune-interventional studies.

Date: 2023
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DOI: 10.1038/s41467-023-37674-8

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