Abstract
Systemic candidiasis is a common, high-mortality, nosocomial fungal infection. Unexpectedly, it has emerged as a complication of anti-complement C5-targeted monoclonal antibody treatment, indicating a critical niche for C5 in antifungal immunity. We identified transcription of complement system genes as the top biological pathway induced in candidemic patients and as predictive of candidemia. Mechanistically, C5a-C5aR1 promoted fungal clearance and host survival in a mouse model of systemic candidiasis by stimulating phagocyte effector function and ERK- and AKT-dependent survival in infected tissues. C5ar1 ablation rewired macrophage metabolism downstream of mTOR, promoting their apoptosis and enhancing mortality through kidney injury. Besides hepatocyte-derived C5, local C5 produced intrinsically by phagocytes provided a key substrate for antifungal protection. Lower serum C5a concentrations or a C5 polymorphism that decreases leukocyte C5 expression correlated independently with poor patient outcomes. Thus, local, phagocyte-derived C5 production licenses phagocyte antimicrobial function and confers innate protection during systemic fungal infection.
| Original language | English |
|---|---|
| Journal | Cell |
| Volume | 186 |
| Issue number | 13 |
| Pages (from-to) | 2802-2822.e22 |
| ISSN | 0092-8674 |
| DOIs | |
| Publication status | Published - 22.06.2023 |
Funding
This work was supported by the DIR of NIAID , NIDDK , NHLBI , NIDCR , and NINDS ( IRP support; L.N.D.) and grants from NIAID ( R00AI141622 ; J.V.D.), NIGMS ( R35GM138283 ; M.K.), NIDCR ( 1K99DE030124-01A1 ; L.M.S.), University of Toledo ( de Arce-Koch Memorial Endowment Fund ; H.R.C.), ERC grant (# 833247 ; M.G.N.), German Research Foundation ( FR 3851/2-1 ; T.F.), and Spinoza Grant of the Netherlands Organization for Scientific Research (M.G.N.). L.N.D. and E.B. were supported by the Departamento de Histología y Embriología, Universidad de la República, Uruguay and the NIH Oxford-Cambridge Scholars Program , respectively. We thank the NIAID animal facilities and research technology branch.
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
Research Areas and Centers
- Academic Focus: Center for Infection and Inflammation Research (ZIEL)
DFG Research Classification Scheme
- 2.21-05 Immunology
- 2.22-22 Clinical Immunology and Allergology
Fingerprint
Dive into the research topics of 'C5a-licensed phagocytes drive sterilizing immunity during systemic fungal infection'. Together they form a unique fingerprint.Projects
- 1 Finished
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Unravelling the role of CD46 in T cell fate decisions
Freiwald, T. (Principal Investigator (PI)), Kemper, C. (Supervisor) & Afzali, B. (Supervisor)
01.01.19 → 31.12.22
Project: DFG Individual Projects › DFG Scholarships: Research Fellowships
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