CysLT1 leukotriene receptor antagonists inhibit the effects of nucleotides acting at P2Y receptors
Autor: | Valérie Capra, Maria P. Abbracchio, Zhan-Guo Gao, Marta Fumagalli, G. Enrico Rovati, Kenneth A. Jacobson, Silvia Ferrario, Maria Rosa Accomazzo, Liaman K. Mamedova |
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Rok vydání: | 2005 |
Předmět: |
Cyclopropanes
P2Y receptor Uridine Triphosphate Acetates Sulfides Pharmacology Biochemistry Article Pranlukast medicine Humans Receptor DNA Primers G protein-coupled receptor Receptors Leukotriene Leukotriene Base Sequence Receptors Purinergic P2 Reverse Transcriptase Polymerase Chain Reaction Leukotriene receptor Chemistry Membrane Proteins Muscarinic acetylcholine receptor M3 U937 Cells Chromones Settore BIO/14 - Farmacologia Quinolines Calcium Montelukast Pranlukast Purine receptors Nucleotides ATP UDP Signal transduction Signal Transduction medicine.drug |
Zdroj: | Biochemical Pharmacology. 71:115-125 |
ISSN: | 0006-2952 |
Popis: | Montelukast and pranlukast are orally active leukotriene receptor antagonists selective for the CysLT1 receptor. Conversely, the hP2Y(1,2,4,6,11,12,13,14) receptors represent a large family of GPCRs responding to either adenine or uracil nucleotides, or to sugar-nucleotides. Montelukast and pranlukast were found to inhibit nucleotide-induced calcium mobilization in a human monocyte-macrophage like cell line, DMSO-differentiated U937 (dU937). Montelukast and pranlukast inhibited the effects of UTP with IC50 values of 7.7 and 4.3 microM, respectively, and inhibited the effects of UDP with IC50 values of 4.5 and 1.6 microM, respectively, in an insurmountable manner. Furthermore, ligand binding studies using [3H]LTD4 excluded the possibility of orthosteric nucleotide binding to the CysLT1 receptor. dU937 cells were shown to express P2Y2, P2Y4, P2Y6, P2Y11, P2Y13 and P2Y14 receptors. Therefore, these antagonists were studied functionally in a heterologous expression system for the human P2Y receptors. In 1321N1 astrocytoma cells stably expressing human P2Y(1,2,4,6) receptors, CysLT1 antagonists inhibited both the P2Y agonist-induced activation of phospholipase C and intracellular Ca2+ mobilization. IC50 values at P2Y1 and P2Y6 receptors were |
Databáze: | OpenAIRE |
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