PMID- 32240653 OWN - NLM STAT- MEDLINE DCOM- 20201225 LR - 20231121 IS - 1873-2968 (Electronic) IS - 0006-2952 (Print) IS - 0006-2952 (Linking) VI - 179 DP - 2020 Sep TI - Targeting the OXE receptor as a potential novel therapy for asthma. PG - 113930 LID - S0006-2952(20)30158-1 [pii] LID - 10.1016/j.bcp.2020.113930 [doi] AB - 5-Oxo-6,8,11,14-eicosatetraenoic acid (5-oxo-ETE) is an arachidonic acid metabolite formed by oxidation of the 5-lipoxygenase (5-LO) product 5S-hydroxy-6,8,11,14-eicosatetraenoic acid (5S-HETE) by the NADP(+)-dependent enzyme 5-hydroxyeicosanoid dehydrogenase. It is the only 5-LO product with appreciable chemoattractant activity for human eosinophils. Its actions are mediated by the selective OXE receptor, which is highly expressed on eosinophils, basophils, neutrophils and monocytes. Orthologs of the OXER1 gene, which encodes this receptor, are found in many species except for rodents. Intradermal injection of 5-oxo-ETE into humans and monkeys elicits eosinophil infiltration into the skin, raising the possibility that it may play a pathophysiological role in eosinophilic diseases. To investigate this and possibly identify a novel therapy we sought to prepare synthetic antagonists that could selectively block the OXE receptor. We synthesized a series of indole-based compounds bearing substituents that mimic the regions of 5-oxo-ETE that are required for biological activity, which we modified to reduce metabolism. The most potent of these OXE receptor antagonists is S-Y048, which is a potent inhibitor of 5-oxo-ETE-induced calcium mobilization (IC(50), 20 pM) and has a long half-life following oral administration. S-Y048 inhibited allergen-induced eosinophil infiltration into the skin of rhesus monkeys that had been experimentally sensitized to house dust mite and inhibited pulmonary inflammation resulting from challenge with aerosolized allergen. These data provide the first evidence for a pathophysiological role for 5-oxo-ETE in mammals and suggest that potent and selective OXE receptor antagonists such as S-Y048 may be useful therapeutic agents in asthma and other eosinophilic diseases. CI - Copyright (c) 2020 Elsevier Inc. All rights reserved. FAU - Powell, William S AU - Powell WS AD - Meakins-Christie Laboratories, Centre for Translational Biology, McGill University Health Centre, 1001 Decarie Blvd, Montreal, QC H4A 3J1, Canada. Electronic address: william.powell@mcgill.ca. FAU - Rokach, Joshua AU - Rokach J AD - Claude Pepper Institute and Department of Chemistry, Florida Institute of Technology, 150 West University Boulevard, Melbourne, FL 32901-6982, USA. LA - eng GR - R01 HL081873/HL/NHLBI NIH HHS/United States GR - PP2-133388/CAPMC/CIHR/Canada GR - MOP-6254/CAPMC/CIHR/Canada PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20200330 PL - England TA - Biochem Pharmacol JT - Biochemical pharmacology JID - 0101032 RN - 0 (5-oxo-eicosatetraenoic acid) RN - 0 (Anti-Asthmatic Agents) RN - 0 (Arachidonic Acids) RN - 0 (OXER1 protein, human) RN - 0 (Receptors, Eicosanoid) RN - 83869-56-1 (Granulocyte-Macrophage Colony-Stimulating Factor) SB - IM MH - Animals MH - Anti-Asthmatic Agents/chemical synthesis/chemistry/*pharmacology MH - Arachidonic Acids/*metabolism/pharmacology MH - Asthma/*drug therapy/*metabolism MH - Basement Membrane/drug effects/metabolism MH - Disease Models, Animal MH - Eosinophils/drug effects/metabolism MH - Granulocyte-Macrophage Colony-Stimulating Factor/metabolism/pharmacology MH - Humans MH - Lipid Peroxidation MH - Molecular Targeted Therapy/methods MH - Neutrophils/drug effects/metabolism MH - Receptors, Eicosanoid/antagonists & inhibitors/*metabolism MH - Structure-Activity Relationship PMC - PMC10656995 MID - NIHMS1580550 OTO - NOTNLM OT - 5-Lipoxygenase products OT - 5-Oxo-ETE OT - Allergy OT - Inflammation OT - OXE receptor antagonists COIS- Potential conflict of interest W.S.P. and J.R. have been granted a patent covering S-230 and have applied for a patent covering S-C025 and S-Y048. EDAT- 2020/04/03 06:00 MHDA- 2020/12/29 06:00 PMCR- 2023/11/18 CRDT- 2020/04/03 06:00 PHST- 2020/02/17 00:00 [received] PHST- 2020/03/19 00:00 [accepted] PHST- 2020/04/03 06:00 [pubmed] PHST- 2020/12/29 06:00 [medline] PHST- 2020/04/03 06:00 [entrez] PHST- 2023/11/18 00:00 [pmc-release] AID - S0006-2952(20)30158-1 [pii] AID - 10.1016/j.bcp.2020.113930 [doi] PST - ppublish SO - Biochem Pharmacol. 2020 Sep;179:113930. doi: 10.1016/j.bcp.2020.113930. Epub 2020 Mar 30.