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Structure of anti-hCXCR2 abN48 in complex with its CXCR2 epitope
Structural highlights
DiseaseCXCR2_HUMAN Autosomal recessive severe congenital neutropenia due to CXCR2 deficiency. FunctionCXCR2_HUMAN Receptor for interleukin-8 which is a powerful neutrophil chemotactic factor. Binding of IL-8 to the receptor causes activation of neutrophils. This response is mediated via a G-protein that activates a phosphatidylinositol-calcium second messenger system. Binds to IL-8 with high affinity. Also binds with high affinity to CXCL3, GRO/MGSA and NAP-2. Publication Abstract from PubMedReceptors and their ligands are important therapeutic targets for about one third of marketed drugs. Here, we describe an epitope-guided approach for selection of antibodies that modulate cellular signaling of targeted receptors. We chose CXC chemokine receptor 2 (CXCR2) in the G-protein coupled receptor superfamily as receptor and a CXCR2 N-terminal peptide for antibody selection. We obtain a highly selective, tight-binding antibody from a 10(11)-member antibody library using combinatorial enrichment. Structural and Hydrogen-Deuterium-Exchange mass spectrometry analyses demonstrate antibody interaction with an N-terminal region of CXCR2 that is part of the IL-8 epitope. The antibody strongly inhibits IL-8-induced and CXCR2-mediated neutrophil chemotaxis in vitro and alleviates hCXCR2-dependent experimental autoimmune encephalomyelitis symptoms in mice. As inappropriate neutrophil migration accompanies many diseases including inflammatory bowel disease, glomerulonephritis, allergic asthma, chronic obstructive pulmonary disease, and cancer, this antibody has potential for development as a therapeutic agent, akin to anti-TNF antibodies. However, an important difference here is that the antibody targets the chemokine receptor and competes with natural ligand, rather than targeting the ligand itself. Selection of a picomolar antibody that targets CXCR2-mediated neutrophil activation and alleviates EAE symptoms.,Shi X, Wan Y, Wang N, Xiang J, Wang T, Yang X, Wang J, Dong X, Dong L, Yan L, Li Y, Liu L, Hou S, Zhong Z, Wilson IA, Yang B, Yang G, Lerner RA Nat Commun. 2021 May 5;12(1):2547. doi: 10.1038/s41467-021-22810-z. PMID:33953162[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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