Skip to main navigation Skip to search Skip to main content

C5a-licensed phagocytes drive sterilizing immunity during systemic fungal infection

Jigar V. Desai, Dhaneshwar Kumar, Tilo Freiwald, Daniel Chauss, Melissa D. Johnson, Michael S. Abers, Julie M. Steinbrink, John R. Perfect, Barbara Alexander, Vasiliki Matzaraki, Brendan D. Snarr, Marissa A. Zarakas, Vasileios Oikonomou, Lakmali M. Silva, Raju Shivarathri, Emily Beltran, Luciana Negro Demontel, Luopin Wang, Jean K. Lim, Dylan LaunderHeather R. Conti, Muthulekha Swamydas, Micah T. McClain, Niki M. Moutsopoulos, Majid Kazemian, Mihai G. Netea, Vinod Kumar, Jörg Köhl, Claudia Kemper, Behdad Afzali, Michail S. Lionakis*

*Corresponding author for this work

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 languageEnglish
JournalCell
Volume186
Issue number13
Pages (from-to)2802-2822.e22
ISSN0092-8674
DOIs
Publication statusPublished - 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)

  1. SDG 3 - Good Health and Well-being
    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.
  • Unravelling the role of CD46 in T cell fate decisions

    Freiwald, T. (Principal Investigator (PI)), Kemper, C. (Supervisor) & Afzali, B. (Supervisor)

    01.01.1931.12.22

    Project: DFG Individual ProjectsDFG Scholarships: Research Fellowships

Cite this