IFNG and rheumatoid arthritis: Specifically, a study showed that treatment with infliximab restored PB CD56+ T cells to normal levels in patients with spondyloarthropathy and rheumatoid arthritis with high baseline values.23 In Behcet’s uveitis, proportions of IFN-γ-producing CD56+ T cells in PB were significantly higher than in healthy controls but normalised after treatment with prednisone and cyclophosphamide.24