Figure 4: Elevated serum GITRL levels in SLE patients with organ damage. (a) Serum GITRL levels exhibited elevation in SLE patients with renal involvement () relative to patients without renal involvement () as well as HC. (b) Serum GITRL levels were higher in SLE patients with vasculitis () than patients in the absence of vasculitis () as well as HC. Each symbol represents an individual patient; horizontal lines indicate median values. GITRL: glucocorticoid-induced TNFR-related protein ligand; HC: healthy control; SLE: systemic lupus erythematosus.