GPX3 and systemic lupus erythematosus: Regarding correlations with a validated SLE disease activity index (SLEDAI), the anti-oxidant glutathione peroxidase 3 (GPX3, strongly decreased, q = 2.2 × 10−7) inversely correlated (p = 0.0005, Spearman rho = −0.52) with SLEDAI scores (Fig. 4b).