title: Serum inflammatory mediators as markers of human Lyme disease activity.
abstract: Chemokines and cytokines are key signaling molecules that orchestrate the trafficking of immune cells, direct them to sites of tissue injury and inflammation and modulate their states of activation and effector cell function. We have measured, using a multiplex-based approach, the levels of 58 immune mediators and 7 acute phase markers in sera derived from of a cohort of patients diagnosed with acute Lyme disease and matched controls. This analysis identified a cytokine signature associated with the early stages of infection and allowed us to identify two subsets (mediator-high and mediator-low) of acute Lyme patients with distinct cytokine signatures that also differed significantly (p<0.0005) in symptom presentation. In particular, the T cell chemokines CXCL9 (MIG), CXCL10 (IP-10) and CCL19 (MIP3B) were coordinately increased in the mediator-high group and levels of these chemokines could be associated with seroconversion status and elevated liver function tests (p = 0.027 and p = 0.021 respectively). There was also upregulation of acute phase proteins including CRP and serum amyloid A. Consistent with the role of CXCL9/CXCL10 in attracting immune cells to the site of infection, CXCR3+ CD4 T cells are reduced in the blood of early acute Lyme disease (p = 0.01) and the decrease correlates with chemokine levels (p = 0.0375). The levels of CXCL9/10 did not relate to the size or number of skin lesions but elevated levels of serum CXCL9/CXCL10 were associated with elevated liver enzymes levels. Collectively these results indicate that the levels of serum chemokines and the levels of expression of their respective chemokine receptors on T cell subsets may prove to be informative biomarkers for Lyme disease and related to specific disease manifestations.
authors.affiliation: Division of Rheumatology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America.
authors.forename: Mark J
authors.initials: MJ
authors.lastname: Soloski
authors.affiliation: Lyme Disease Research Foundation, Baltimore, Maryland, United States of Ameica.
authors.forename: Lauren A
authors.initials: LA
authors.lastname: Crowder
authors.affiliation: Division of Immunology and Rheumatology, Stanford University School of Medicine; Veterans Affairs Palo Alto Health Care System, Palo Alto, California, United States of America.
authors.forename: Lauren J
authors.initials: LJ
authors.lastname: Lahey
authors.affiliation: Division of Immunology and Rheumatology, Stanford University School of Medicine; Veterans Affairs Palo Alto Health Care System, Palo Alto, California, United States of America.
authors.forename: Catriona A
authors.initials: CA
authors.lastname: Wagner
authors.affiliation: Division of Immunology and Rheumatology, Stanford University School of Medicine; Veterans Affairs Palo Alto Health Care System, Palo Alto, California, United States of America.
authors.forename: William H
authors.initials: WH
authors.lastname: Robinson
authors.affiliation: Division of Internal Medicine, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America.
authors.forename: John N
authors.initials: JN
authors.lastname: Aucott
mesh_terms: D000209:Acute-Phase Proteins / Q000378:metabolism; D015415:Biomarkers / Q000097:blood; D018925:Chemokines / Q000097:blood*; D016207:Cytokines / Q000097:blood*; D006801:Humans; D008193:Lyme Disease / Q000097:blood* / Q000276:immunology; D000685:Serum Amyloid A Protein / Q000378:metabolism; D015398:Signal Transduction; D015854:Up-Regulation
chemical_list: D000209:Acute-Phase Proteins; D015415:Biomarkers; D018925:Chemokines; D016207:Cytokines; D000685:Serum Amyloid A Protein
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