RGD Reference Report - Orchestration of inflammation and adaptive immunity in Borrelia burgdorferi-induced arthritis by neutrophil-activating protein A. - Rat Genome Database

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Orchestration of inflammation and adaptive immunity in Borrelia burgdorferi-induced arthritis by neutrophil-activating protein A.

Authors: Codolo, G  Bossi, F  Durigutto, P  Bella, CD  Fischetti, F  Amedei, A  Tedesco, F  D'Elios, S  Cimmino, M  Micheletti, A  Cassatella, MA  D'Elios, MM  De Bernard, M 
Citation: Codolo G, etal., Arthritis Rheum. 2013 May;65(5):1232-42. doi: 10.1002/art.37875.
RGD ID: 7488895
Pubmed: PMID:23371320   (View Abstract at PubMed)
DOI: DOI:10.1002/art.37875   (Journal Full-text)

OBJECTIVE: Lyme arthritis (LA) is characterized by infiltration of inflammatory cells, mainly neutrophils (polymorphonuclear cells [PMNs]) and T cells, into the joints. This study was undertaken to evaluate the role of the neutrophil-activating protein A (NapA) of Borrelia burgdorferi in eliciting inflammation and in driving the adaptive immune response. METHODS: Levels of NapA, interferon-gamma (IFNgamma), interleukin-17 (IL-17), and T cell-attracting chemokines were assessed by enzyme-linked immunosorbent assay in synovial fluid from patients with LA. The profile of T cells recruited into the synovia of patients with LA was defined by fluorescence-activated cell sorting analysis. NapA was intraarticularly injected into rat knees, and the cells recruited in synovia were characterized. The role of NapA in recruiting immune cells was confirmed by chemotaxis assays using a Transwell system. RESULTS: NapA, IFNgamma, IL-17, CCL2, CCL20, and CXCL10 accumulated in synovial fluid from patients with LA. Accordingly, T cells obtained from these patients produced IFNgamma or IL-17, but notably, some produced both cytokines. NapA promoted neutrophil and T lymphocyte recruitment both in vitro and in vivo. Interestingly, the infiltration of T cells not only resulted from the chemotactic activity of NapA but also relied on the chemokines produced by PMNs exposed to NapA. CONCLUSION: We provide evidence that NapA functions as one of the main bacterial products involved in the pathogenesis of LA. Accordingly, we show that, at very early stages of LA, NapA accumulates and, in turn, orchestrates the recruitment of inflammatory cells into the joint cavity. Thereafter, with the contribution of recruited cells, NapA promotes the infiltration of T cells producing IL-17 and/or IFNgamma.



RGD Manual Disease Annotations    Click to see Annotation Detail View

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
CCL20HumanLyme disease  IEP protein:increased expression:synovial fluid RGD 
Ccl20RatLyme disease  ISOCCL20 (Homo sapiens)protein:increased expression:synovial fluid RGD 
Ccl20MouseLyme disease  ISOCCL20 (Homo sapiens)protein:increased expression:synovial fluid RGD 

Objects Annotated

Genes (Rattus norvegicus)
Ccl20  (C-C motif chemokine ligand 20)

Genes (Mus musculus)
Ccl20  (C-C motif chemokine ligand 20)

Genes (Homo sapiens)
CCL20  (C-C motif chemokine ligand 20)


Additional Information