FPR2 and lobular neoplasia: The significantly upregulated genes including formyl peptide receptor 1 (FPR1), formyl peptide receptor 2 (FPR2), and complement C3a receptor 1 (C3aR1) were significantly enriched in the GO term of complement receptor-mediated signaling pathway (GO: 0002430) in the kidneys of LN patients and NZB/W mice.