The impact of spleen tyrosine kinase (Syk) signaling might be prominent in lupus because (i) Syk is a shared downstream signaling molecule among circulating immune complex, LPS, and (1→3)-β-D-glucan (BG), and (ii) all of these factors are detectable in the serum of Fc gamma receptor IIb-deficient (FcgRIIb-/-) mice with sepsis. Syk inhibition downregulated several inflammatory pathways in FcgRIIb-/- macrophages activated with BG + LPS suggesting the potential anti-inflammatory impact of Syk inhibitors in lupus.

InsB (9-23) is an insulin B-chain peptide that binds to a class II histocompatibility complex (MHC) allele called I-Ag7.

Neuropeptide Y (3-36) (porcine) is an agonist of neuropeptide Y (NPY) receptor subtype Y2, and stimulates feeding in rats. Neuropeptide Y (3-36) (porcine) is a highly Y2 selective ligand compared with nselective Y1/Y2 receptor ligand, Neuropeptide Y 1-36.