title: Restoration of peripheral blood natural killer and B cell levels in patients affected by rheumatoid and psoriatic arthritis during etanercept treatment.
abstract: Etanercept (ETN) is an anti-tumour necrosis factor (TNF)-α agent used in rheumatoid arthritis (RA) and psoriatic arthritis (PsA). Few studies focused on the effects of anti-TNF-α on peripheral blood cells. We aimed to evaluate peripheral blood cells in RA and PsA patients during ETN treatment and to explore their relationships with disease activity. RA (n = 82) and PsA (n = 32) patients who started ETN were included into the study and evaluated prospectively before the beginning of ETN therapy and after 14, 22, 54 and 102 weeks. Patients were studied in terms of disease activity score on 28 joints (DAS28), clinical response and laboratory findings. Natural killer (NK) cells, B cells and T cells were characterized by immunophenotyping. Both the RA and the PsA patients showed reduced NK and B cell count before ETN treatment compared with controls. A negative correlation was demonstrated between DAS28 and B cell count in RA patients at baseline. Sustained significant increase of NK and B cells up to normal levels was observed in RA and PsA patients along ETN treatment. Increase of NK cell count was associated with a good-moderate clinical response to ETN in both RA and PsA patients. During ETN treatment peripheral blood NK and B cells levels were restored in RA and PsA patients. Correlations between NK and B cells with disease activity were observed, suggesting that those effects could be mediated by ETN treatment.
authors.affiliation: Department of Medicina dei Sistemi, Rheumatology, Allergology and Clinical Immunology, University of Rome Tor Vergata, Rome, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Conigliaro
authors.forename: P
authors.initials: P
authors.lastname: Triggianese
authors.forename: C
authors.initials: C
authors.lastname: Perricone
authors.forename: M S
authors.initials: MS
authors.lastname: Chimenti
authors.forename: G
authors.initials: G
authors.lastname: Di Muzio
authors.forename: E
authors.initials: E
authors.lastname: Ballanti
authors.forename: M D
authors.initials: MD
authors.lastname: Guarino
authors.forename: B
authors.initials: B
authors.lastname: Kroegler
authors.forename: G
authors.initials: G
authors.lastname: Gigliucci
authors.forename: S
authors.initials: S
authors.lastname: Grelli
authors.forename: R
authors.initials: R
authors.lastname: Perricone
mesh_terms: D000328:Adult; D000368:Aged; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000627:therapeutic use*; D015535:Arthritis, Psoriatic / Q000188:drug therapy* / Q000276:immunology; D001172:Arthritis, Rheumatoid / Q000188:drug therapy* / Q000276:immunology; D001402:B-Lymphocytes / Q000187:drug effects* / Q000276:immunology; D001775:Blood Circulation / Q000187:drug effects / Q000276:immunology; D002452:Cell Count; D018450:Disease Progression; D000068800:Etanercept; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007074:Immunoglobulin G / Q000627:therapeutic use*; D016130:Immunophenotyping; D007694:Killer Cells, Natural / Q000187:drug effects* / Q000276:immunology; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D018124:Receptors, Tumor Necrosis Factor / Q000627:therapeutic use*
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D007074:Immunoglobulin G; D018124:Receptors, Tumor Necrosis Factor; D000068800:Etanercept
keywords: B cell; arthritis; autoimmunity; natural killer cells