LPA5 Receptor Antibodies
The lysophosphatidic acid receptor 5 (LPA₅), encoded by the LPAR5 gene, is a class A G protein–coupled receptor (GPCR) that binds the bioactive lipid lysophosphatidic acid (LPA) and mediates distinct cellular responses compared with LPA₁–₄ receptors. LPA₅ couples primarily to G12/13 and Gq/11 proteins, leading to activation of RhoA, phospholipase C (PLC), intracellular calcium mobilization, and ERK/MAPK signaling, which regulate cell motility, cytoskeletal organization, and proliferation. It is expressed in a variety of tissues, including the gastrointestinal tract, immune cells, brain, and endothelial cells, suggesting roles in both immune regulation and tissue homeostasis. Functionally, LPA₅ has been implicated in platelet activation, neuropathic pain, immune cell chemotaxis, and the regulation of intestinal barrier integrity. In cancer, LPA₅ signaling can influence tumor cell migration and invasion, although its effects are sometimes context-dependent and can differ from other LPA receptors. Pharmacological studies using selective agonists and antagonists have revealed its role as a key lipid-sensing receptor mediating both pro-migratory and inhibitory signals depending on cell type. Additionally, LPA₅ contributes to inflammatory responses by modulating cytokine release and leukocyte function. Overall, LPA₅ serves as a versatile modulator of cell signaling, linking lipid mediators to immune, vascular, and neuronal processes, and represents a potential therapeutic target in pain, inflammation, and cancer. For more information on LPA5 pharmacology please refer to the IUPHAR database. For further reading refer to:
Chun J, Hla T, Lynch KR, Spiegel S, Moolenaar WH. International Union of Basic and Clinical Pharmacology. LXXVIII. Lysophospholipid receptor nomenclature. Pharmacol Rev. 2010 Dec;62(4):579-87. doi: 10.1124/pr.110.003111. PMID: 21079037; PMCID: PMC2993255.
Kihara Y, Maceyka M, Spiegel S, Chun J. Lysophospholipid receptor nomenclature review: IUPHAR Review 8. Br J Pharmacol. 2014 Aug;171(15):3575-94. doi: 10.1111/bph.12678. Epub 2014 Jul 12. PMID: 24602016; PMCID: PMC4128058.
Blaho V, Chun J, Herr D, Jones D, Jonnalagadda D, Kihara Y. Lysophospholipid (S1P) receptors in GtoPdb v.2023.1. IUPHAR/BPS Guide to Pharmacology CITE. 2023; 2023(1).