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Lack of the receptor for advanced glycation end-products attenuates e. coli pneumonia in mice

Ramsgaard, L and Englert, JM and Manni, ML and Milutinovic, PS and Gefter, J and Tobolewski, J and Crum, L and Coudriet, GM and Piganelli, J and Zamora, R and Vodovotz, Y and Enghild, JJ and Oury, TD (2011) Lack of the receptor for advanced glycation end-products attenuates e. coli pneumonia in mice. PLoS ONE, 6 (5).

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Background: The receptor for advanced glycation end-products (RAGE) has been suggested to modulate lung injury in models of acute pulmonary inflammation. To study this further, model systems utilizing wild type and RAGE knockout (KO) mice were used to determine the role of RAGE signaling in lipopolysaccharide (LPS) and E. coli induced acute pulmonary inflammation. The effect of intraperitoneal (i.p.) and intratracheal (i.t.) administration of mouse soluble RAGE on E. coli injury was also investigated. Methodology/Principal Findings: C57BL/6 wild type and RAGE KO mice received an i.t. instillation of LPS, E. coli, or vehicle control. Some groups also received i.p. or i.t. administration of mouse soluble RAGE. After 24 hours, the role of RAGE expression on inflammation was assessed by comparing responses in wild type and RAGE KO. RAGE protein levels decreased in wild type lung homogenates after treatment with either LPS or bacteria. In addition, soluble RAGE and HMGB1 increased in the BALF after E. coli instillation. RAGE KO mice challenged with LPS had the same degree of inflammation as wild type mice. However, when challenged with E. coli, RAGE KO mice had significantly less inflammation when compared to wild type mice. Most cytokine levels were lower in the BALF of RAGE KO mice compared to wild type mice after E. coli injury, while only monocyte chemotactic protein-1, MCP-1, was lower after LPS challenge. Neither i.p. nor i.t. administration of mouse soluble RAGE attenuated the severity of E. coli injury in wild type mice. Conclusions/Significance: Lack of RAGE in the lung does not protect against LPS induced acute pulmonary inflammation, but attenuates injury following live E. coli challenge. These findings suggest that RAGE mediates responses to E. coli-associated pathogen-associated molecular pattern molecules other than LPS or other bacterial specific signaling responses. Soluble RAGE treatment had no effect on inflammation. © 2011 Ramsgaard et al.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Ramsgaard, L
Englert, JM
Manni, MLmlm45@pitt.eduMLM450000-0002-6775-294X
Milutinovic, PS
Gefter, J
Tobolewski, J
Crum, L
Coudriet, GMgmr9@pitt.eduGMR9
Piganelli, Jjdp51@pitt.eduJDP51
Zamora, Rzamorar@pitt.eduZAMORAR
Vodovotz, Yvodovotz@pitt.eduVODOVOTZ
Enghild, JJ
Oury, TDtdoury@pitt.eduTDOURY
ContributionContributors NameEmailPitt UsernameORCID
Centers: Other Centers, Institutes, Offices, or Units > McGowan Institute for Regenerative Medicine
Date: 27 May 2011
Date Type: Publication
Journal or Publication Title: PLoS ONE
Volume: 6
Number: 5
DOI or Unique Handle: 10.1371/journal.pone.0020132
Schools and Programs: School of Medicine > Pathology
School of Medicine > Surgery
Refereed: Yes
MeSH Headings: Animals; Blotting, Western; Bronchoalveolar Lavage Fluid--chemistry; Cells, Cultured; Chemokine CCL2--metabolism; Chemokine CCL3--metabolism; Escherichia coli--pathogenicity; Interleukin-12--metabolism; Interleukin-1beta--metabolism; Interleukin-6--metabolism; Lung--metabolism; Lung--microbiology; Male; Mice; Mice, Inbred C57BL; Mice, Knockout; Peroxidase--genetics; Peroxidase--metabolism; Pneumonia--genetics; Pneumonia--metabolism; Pneumonia--microbiology; Receptors, Immunologic--genetics; Receptors, Immunologic--metabolism; Tumor Necrosis Factor-alpha--metabolism
Other ID: NLM PMC3100338
PubMed Central ID: PMC3100338
PubMed ID: 21629785
Date Deposited: 29 Aug 2012 21:07
Last Modified: 27 Jan 2019 02:55


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