Fig. 2From: Elevated serum autoantibodies against co-inhibitory PD-1 facilitate T cell proliferation and correlate with disease activity in new-onset systemic lupus erythematosus patientsCorrelation between anti-PD-1 IgG and SLE disease-related indicators including SLEDAI score (a), ESR (b), anti-dsDNA (c), and ANA (d). ANA antinuclear antibodies, ESR erythrocyte sedimentation rate, Ig immunoglobulin, PD-1 programmed cell death protein 1, SLEDAI-2Â K SLE disease activity index 2000Back to article page