CIT and systemic lupus erythematosus: As shown in Fig. 4A, when we cultured SLE PBMCs for 7 days in the presence of LL37 or cit-LL37 or control antigens, anti-LL37 (left panel) and anti-cit-LL37 (right panel) antibodies became apparent in culture supernatants of PBMCs stimulated with LL37 and cit-LL37, (but not in cultures stimulated with control peptides).