title: Circulating cytotoxic CD8(+) CD28(-) T cells in ankylosing spondylitis.
abstract: Circulating CD8(+) CD28(-) T cells were found to be expanded more in patients with ankylosing spondylitis than in an age-matched healthy population (41.2 +/- 17.7% versus 18.6 +/- 7.6%). The level of CD8(+)CD28(-) T cells was dependent on the disease status, but was independent of age. Most of the CD8(+) CD28(-) T cells produced perforin after stimulation in vitro, in contrast to their CD8(+)CD28(+) counterparts. From the clinical perspective, the percentage of the cytotoxic CD8(+) CD28(-) T cells reflected a more severe course of disease, as it correlated with distinct movement restrictions, as well as the metrology score summarizing cervical rotation (in sitting position), chin-to-jugulum distance, thoracic Schober, chest expansion, and fingers-to-floor distance (P = 0.032).
authors.affiliation: Department of Internal Medicine, University of Innsbruck, Austria. michael.schirmer@ibk.ac.at
authors.forename: Michael
authors.initials: M
authors.lastname: Schirmer
authors.forename: Christian
authors.initials: C
authors.lastname: Goldberger
authors.forename: Reinhard
authors.initials: R
authors.lastname: Würzner
authors.forename: Christina
authors.initials: C
authors.lastname: Duftner
authors.forename: Karl-P
authors.initials: KP
authors.lastname: Pfeiffer
authors.forename: Johannes
authors.initials: J
authors.lastname: Clausen
authors.forename: Günther
authors.initials: G
authors.lastname: Neumayr
authors.forename: Albrecht
authors.initials: A
authors.lastname: Falkenbach
mesh_terms: D018106:CD28 Antigens / Q000097:blood*; D003587:Cytomegalovirus / Q000276:immunology / Q000302:isolation & purification; D005260:Female; D005434:Flow Cytometry; D004854:Herpesvirus 4, Human / Q000276:immunology / Q000302:isolation & purification; D006801:Humans; D007371:Interferon-gamma / Q000378:metabolism; D008297:Male; D008562:Membrane Glycoproteins / Q000378:metabolism; D008875:Middle Aged; D054353:Perforin; D052899:Pore Forming Cytotoxic Proteins; D016037:Single-Blind Method; D013167:Spondylitis, Ankylosing / Q000276:immunology* / Q000378:metabolism; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology* / Q000378:metabolism; D050378:T-Lymphocytes, Regulatory / Q000276:immunology / Q000378:metabolism
chemical_list: D018106:CD28 Antigens; D008562:Membrane Glycoproteins; D052899:Pore Forming Cytotoxic Proteins; D054353:Perforin; D007371:Interferon-gamma