Cited by 32Complement system in diseasesSepsis Diagnosis and TreatmentT-cell and B-cell Immunology

γδT-cell function in sepsis is modulated by C5a receptor signalling

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Han, Gencheng, Geng, Shaoxia, Li, Yurong, Chen, Guojiang, Wang, Renxi, Li, Xinying, Ma, Yuanfang, Shen, Beifen +1 more·2011·Immunology

Abstract

Summary: We previously showed that γδT cells are involved in the pathogenesis of sepsis, but, the underlying mechanisms remained unclear. The present study demonstrates, for the first time, that γδT cells express the complement C5a receptor (C5aR, CD88) and that CD88 expression in γδT cells was up‐regulated in mice following sepsis both at protein and mRNA levels. Complement C5a itself contributed to the regulation of C5aR expression on γδT cells, as (i) neutralization of C5a in vivo prevented the expression of C5aR on γδT cells in septic mice and (ii) incubation of mouse spleen cells or purified γδT cells with recombinant C5a in vitro increased CD88 expression by γδT cells at both protein and mRNA levels. C5a receptor on γδT cells also mediates increased interleukin‐17 (IL‐17) expression as incubation of mouse spleen cells or purified γδT cells with recombinant C5a promotes the IL‐17 expression by γδT cells. Ligation of the C5aR on γδT cells activated the phosphoinositide 3‐kinase (PI3K)/Akt signalling pathway, which enhances CD88 expression and promotes IL‐17 secretion. These results demonstrate that C5a acts directly on the C5aR expressed on γδT cells, resulting in cell activation, and subsequently enhances their capacity for IL‐17 production. The up‐regulation of the PI3K/Akt pathway following C5a stimulation contributes to up‐regulation of γδT‐cell function.

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Crossref · 10.1111/j.1365-2567.2011.03445.x

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Authors
Han, G., Geng, S., Li, Y., Chen, G., Wang, R., Li, X., Ma, Y., Shen, B., & Li, Y.
Affiliations
  • Institute of Basic Medical Sciences of the Chinese Academy of Medical Sciences (CN)
  • Henan University (CN)
Corresponding author
  • Han, Gencheng
  • Li, Yan
Venue
Immunology
Publisher
Wiley
Published
2011-04-19
Volume
133
Issue
3
Pages
340-349
ISSN
  • 0019-2805 (ISSN-L)
  • 1365-2567
OpenAlex
W2142948398
Cited by
32
References
41
Citations by year
2025: 1 · 2023: 4 · 2022: 2 · 2021: 1 · 2020: 1 · 2019: 3 · 2018: 4 · 2017: 2 · 2015: 3 · 2014: 3 · 2013: 6 · 2012: 2
FWCI
1.56
Type
journal article
Language
en
Open access
Locations
  • Immunology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Complement system in diseases
  • Health Sciences › Medicine › Epidemiology › Sepsis Diagnosis and Treatment
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
Keywords
γδ T cells, sepsis, C5a, C5a receptor, IL-17, PI3K/Akt signaling, T cell activation, complement system
MeSH terms
Animals, Cells, Cultured, Flow Cytometry, Immunologic Factors, Male, Mice, Inbred C57BL, Recombinant Proteins, T-Lymphocytes, Signal Transduction, Up-Regulation, Complement C5a, Receptors, Antigen, T-Cell, gamma-delta, Sepsis, Reverse Transcriptase Polymerase Chain Reaction, Interleukin-17, Receptor, Anaphylatoxin C5a, Mice

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