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Title: Pseudomonas aeruginosa sabotages the generation of host proresolving lipid mediators

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1];  [2];  [3];  [1];  [4];  [5];  [2];  [2];  [4];  [4];  [5];  [5];  [1];  [3];  [2];  [1]
  1. Univ. of Pittsburgh, PA (United States). School of Medicine
  2. Geisel School of Medicine at Dartmouth, Hanover, NH (United States)
  3. Harvard Medical School, Boston, MA (United States). Brigham and Women’s Hospital
  4. Univ. of California, Davis, CA (United States)
  5. Univ. of Pittsburgh, PA (United States)

Recurrent Pseudomonas aeruginosa infections coupled with robust, damaging neutrophilic inflammation characterize the chronic lung disease cystic fibrosis (CF). The proresolving lipid mediator, 15-epi lipoxin A4 (15-epi LXA4), plays a critical role in limiting neutrophil activation and tissue inflammation, thus promoting the return to tissue homeostasis. In this work w we show that a secreted P. aeruginosa epoxide hydrolase, cystic fibrosis transmembrane conductance regulator inhibitory factor (Cif), can disrupt 15-epi LXA4 transcellular biosynthesis and function. In the airway, 15-epi LXA4 production is stimulated by the epithelial-derived eicosanoid 14,15-epoxyeicosatrienoic acid (14,15-EET). Cif sabotages the production of 15-epi LXA4 by rapidly hydrolyzing 14,15-EET into its cognate diol, eliminating a proresolving signal that potently suppresses IL-8–driven neutrophil transepithelial migration in vitro. Retrospective analyses of samples from patients with CF supported the translational relevance of these preclinical findings. Elevated levels of Cif in bronchoalveolar lavage fluid were correlated with lower levels of 15-epi LXA4, increased IL-8 concentrations, and impaired lung function. Together, these findings provide structural, biochemical, and immunological evidence that the bacterial epoxide hydrolase Cif disrupts resolution pathways during bacterial lung infections. The data also suggest that Cif contributes to sustained pulmonary inflammation and associated loss of lung function in patients with CF

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Institutes of Health (NIH); Gilead Sciences Research Scholars in Cystic Fibrosis Award; Cystic Fibrosis Foundation; Munck-Pfefferkorn Award
Grant/Contract Number:
SC0012704; K99/R00HL098342; P30DK072506; T32AI060525; P01GM095467; U24AI118656; U24DK097154; R01AI091699; P20GM113132; P30GM106394; T32GM008704; GM-0800; MADDEN08G0; STANTO19R0
OSTI ID:
1409591
Report Number(s):
BNL-114643-2017-JA
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Vol. 114, Issue 1; ISSN 0027-8424
Publisher:
National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 47 works
Citation information provided by
Web of Science

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  • Bahl, Christopher D.; MacEachran, Daniel P.; O'Toole, George A.
  • Acta Crystallographica Section F Structural Biology and Crystallization Communications, Vol. 66, Issue 1 https://doi.org/10.1107/S1744309109047599
journal December 2009
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Cited By (14)

Inflammation in cystic fibrosis: An update journal July 2018
Substrate and inhibitor selectivity, and biological activity of an epoxide hydrolase from Trichoderma reesei journal November 2018
Resolvin D1 enhances the resolution of lung inflammation caused by long-term Pseudomonas aeruginosa infection journal April 2017
Resolution of chronic inflammatory disease: universal and tissue-specific concepts journal August 2018
microRNA-181b is increased in cystic fibrosis cells and impairs lipoxin A4 receptor-dependent mechanisms of inflammation resolution and antimicrobial defense journal October 2017
Co‐opting oxylipin signals in microbial disease journal March 2019
Effects of Pseudomonas aeruginosa on CFTR chloride secretion and the host immune response journal April 2017
Specialized Proresolving Mediators in Innate and Adaptive Immune Responses in Airway Diseases journal July 2018
Integrative Physiology of Pneumonia journal July 2018
Advanced Role of Neutrophils in Common Respiratory Diseases journal January 2017
Pseudomonas aeruginosa utilizes host polyunsaturated phosphatidylethanolamines to trigger theft-ferroptosis in bronchial epithelium journal September 2018
Inflammatory and Pro-resolving Lipids in Trypanosomatid Infections: A Key to Understanding Parasite Control journal August 2018
Pseudomonas aeruginosa Toxin ExoU as a Therapeutic Target in the Treatment of Bacterial Infections journal December 2019
Pseudomonas aeruginosa ExoU augments neutrophil transepithelial migration journal August 2017