Zou, J Up regulation of the production of tumour necrosis factor alpha and interferon gamma by T cells in ankylosing spondylitis during treatment with etanercept. [electronic resource] - Annals of the rheumatic diseases Jun 2003 - 561-4 p. digital Publication Type: Clinical Trial; Journal Article; Randomized Controlled Trial ISSN: 0003-4967 Standard No.: 10.1136/ard.62.6.561 doi Subjects--Topical Terms: Antirheumatic Agents--therapeutic useCD4-Positive T-Lymphocytes--drug effectsCD8-Positive T-Lymphocytes--drug effectsCells, CulturedDouble-Blind MethodEtanerceptHumansImmunoglobulin G--therapeutic useInterferon-gamma--biosynthesisLongitudinal StudiesLymphocyte ActivationReceptors, Tumor Necrosis Factor--therapeutic useSpondylitis, Ankylosing--drug therapyTumor Necrosis Factor-alpha--biosynthesisUp-Regulation--drug effects