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Immunometabolic hijacking of immune cells by a Pseudomonas aeruginosa quorum-sensing signal

Arunava Bandyopadhaya, View ORCID ProfileVijay K Singh, Arijit Chakraborty, A. Aria Tzika, Laurence G Rahme
doi: https://doi.org/10.1101/2021.10.03.462785
Arunava Bandyopadhaya
1Department of Surgery, Massachusetts General Hospital, and Harvard Medical School, Boston, Massachusetts, USA
2Department of Microbiology, Harvard Medical School, Boston, Massachusetts, USA
3Shriners Hospitals for Children Boston, Boston, Massachusetts, USA
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Vijay K Singh
1Department of Surgery, Massachusetts General Hospital, and Harvard Medical School, Boston, Massachusetts, USA
2Department of Microbiology, Harvard Medical School, Boston, Massachusetts, USA
3Shriners Hospitals for Children Boston, Boston, Massachusetts, USA
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  • ORCID record for Vijay K Singh
Arijit Chakraborty
1Department of Surgery, Massachusetts General Hospital, and Harvard Medical School, Boston, Massachusetts, USA
2Department of Microbiology, Harvard Medical School, Boston, Massachusetts, USA
3Shriners Hospitals for Children Boston, Boston, Massachusetts, USA
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A. Aria Tzika
1Department of Surgery, Massachusetts General Hospital, and Harvard Medical School, Boston, Massachusetts, USA
3Shriners Hospitals for Children Boston, Boston, Massachusetts, USA
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Laurence G Rahme
1Department of Surgery, Massachusetts General Hospital, and Harvard Medical School, Boston, Massachusetts, USA
2Department of Microbiology, Harvard Medical School, Boston, Massachusetts, USA
3Shriners Hospitals for Children Boston, Boston, Massachusetts, USA
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  • For correspondence: rahme@molbio.mgh.harvard.edu
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Abstract

Macrophages utilize metabolic pathways to generate energy and metabolites that may be vulnerable to pathogen hijacking to favor pathogen survival and persistence. It is unclear how bacterial pathogens alter metabolic pathways in immune cells for their benefit and persistence in the infected host. We have shown that the Pseudomonas aeruginosa quorum sensing (QS) signal molecule 2-aminoacetophenone (2-AA) allows pathogen persistence in host tissues by triggering host tolerization via histone deacetylase (HDAC)1-mediated epigenetic reprogramming. Here, we provide strong evidence that 2-AA-meditated persistence is linked to specific metabolic pathway alterations that reduce energy availability and biosynthetic macromolecules involved in host immune responses. 2-AA promotes a Warburg-like metabolic reprogramming effect, thereby increasing levels of lactate, which repressed inflammatory signaling in macrophages. Moreover, it interferes with pyruvate translocation to mitochondria, reducing mitochondrial (mt)-oxidative phosphorylation (OXPHOS) due to down-regulation of estrogen-regulated receptor (ERR)α and mitochondrial pyruvate carrier (MPC)-1. This metabolic reprogramming dampened energy production, reduced the acetyl-CoA pool, and generated an anti-inflammatory milieu that favors P. aeruginosa persistence. These findings provide evidence of first-in-class metabolic reprogramming in immune cells mediated by a QS signaling molecule. The specific metabolic programs affected provide insights that may guide the design and development of therapeutics and protective interventions against pathogen-induced immunometabolic alterations and persistence factors.

Competing Interest Statement

L.G.R has a financial interest in Spero Therapeutics, a company developing therapies for the treatment of bacterial infections. L.G.Rs financial interests were reviewed and managed by Massachusetts General Hospital according to their conflict of interest policies. The rest of us declare that we have no competing interests.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted October 03, 2021.
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Immunometabolic hijacking of immune cells by a Pseudomonas aeruginosa quorum-sensing signal
Arunava Bandyopadhaya, Vijay K Singh, Arijit Chakraborty, A. Aria Tzika, Laurence G Rahme
bioRxiv 2021.10.03.462785; doi: https://doi.org/10.1101/2021.10.03.462785
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Immunometabolic hijacking of immune cells by a Pseudomonas aeruginosa quorum-sensing signal
Arunava Bandyopadhaya, Vijay K Singh, Arijit Chakraborty, A. Aria Tzika, Laurence G Rahme
bioRxiv 2021.10.03.462785; doi: https://doi.org/10.1101/2021.10.03.462785

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