BSG and psoriasis: ELISA showed that the mean serum CD147 level was 381.0 ± 119.2 pg/mL (range 274–609 pg/mL) in the 5 healthy subjects and 509.4 ± 126.5 pg/mL (range 377–774 pg/mL) in the 25 psoriasis patients (p = 0.0225, Figure 1a).