title: Assessing immune function by profiling cytokine release from stimulated blood leukocytes and the risk of infection in rheumatoid arthritis.
abstract: Persons with rheumatoid arthritis (RA) suffer a high burden of infections, but currently no biomarkers are available to identify individuals at greatest risk. A prospective longitudinal study was therefore conducted to determine the association between the responsiveness of ex vivo cytokine production and 6-month risk of infections. Infections were identified by billing codes and validated by medical record review. At baseline, the release of 17 cytokines by peripheral blood mononuclear cells in response to stimulation, or media alone, was measured using multiplexed cytokine analysis. Production of IL-2, IL-8, IL-10, IL-17, TNF-α, IFN-γ, and GM-CSF, induced by various conditions, was significantly associated with the occurrence of infections. A multivariable prediction model based on these data provided new information on the risk of infection beyond standard assessments of disease activity, severity, and treatment. Future studies could utilize this information to devise new biomarkers for the prediction of infection in patients with RA.
authors.affiliation: Division of Rheumatology, Department of Medicine, College of Medicine, Mayo Clinic, Rochester, MN, USA.
authors.forename: Megan L
authors.initials: ML
authors.lastname: Krause
authors.forename: John M
authors.initials: JM
authors.lastname: Davis
authors.forename: Keith L
authors.initials: KL
authors.lastname: Knutson
authors.forename: Michael A
authors.initials: MA
authors.lastname: Strausbauch
authors.forename: Michael A
authors.initials: MA
authors.lastname: Strausbach
authors.forename: Cynthia S
authors.initials: CS
authors.lastname: Crowson
authors.forename: Terry M
authors.initials: TM
authors.lastname: Therneau
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Wettstein
authors.forename: Eric L
authors.initials: EL
authors.lastname: Matteson
authors.forename: Sherine E
authors.initials: SE
authors.lastname: Gabriel
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000097:blood / Q000150:complications* / Q000276:immunology*; D015331:Cohort Studies; D016207:Cytokines / Q000096:biosynthesis* / Q000097:blood; D005260:Female; D006801:Humans; D066298:In Vitro Techniques; D007239:Infections / Q000097:blood / Q000209:etiology* / Q000276:immunology*; D007963:Leukocytes, Mononuclear / Q000276:immunology; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012307:Risk Factors
chemical_list: D016207:Cytokines