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Sphingosine-1-phosphate (S1P) receptor modulators act on S1PR1 to S1PR5, five G protein-coupled lipid receptors. In 1998 S1P was identified as a ligand of the orphan receptor endothelial differentiation gene 1 (EDG-1), now called S1PR1. FTY720 (fingolimod) was shown in 2002 to be phosphorylated in vivo and to act on four of the five S1P receptors. Two years later, lymphocyte egress from thymus and lymph nodes was found to depend on S1PR1. Ozanimod, BAF312 and ponesimod are further S1PR1-directed modulators, CYM 5442 HCl is a selective S1PR1 agonist and TY-52156 blocks S1PR3. Opaganib inhibits sphingosine kinase 2 (SphK2) and so limits S1P synthesis upstream of the receptors.
S1PR1 Agonist 2 is a potent agonist targeting the S1P receptor 1 (S1PR1). This compound, derived from sphingosine-1-phosphate (S1P), engages G protein-coupled receptors, influencing various physiological processes. S1PR1 Agonist 2 is primarily utilized in research studies focused on autoimmune diseases, facilitating the exploration of therapeutic strategies in this area.
S1PR1 ligand 1 is a specific agonist targeting the S1PR1 receptor with an IC50 of 8.7 nM. This compound demonstrates favorable brain permeability, making it suitable for exploring S1PR1 functions in neurological disorders. Additionally, S1PR1 ligand 1 can be labeled with 18F for imaging studies, facilitating research into its role in brain pathologies.
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ACT-209905 is an agonist of the S1P1 receptor, demonstrating potent inhibition of glioblastoma (GBM) cell growth and migration. In addition to its antitumor properties, ACT-209905 exhibits immunomodulating activity, making it a valuable tool for investigating autoimmune diseases. This compound is suitable for research applications aimed at elucidating the roles of S1P1 signaling in cancer and immune regulation.
PPI-4955 is a selective agonist of the sphingosine-1-phosphate receptor subtype 1 (S1P₁), displaying an EC50 of 1.62 nM. Its active phosphorylated form, PPI-4955-P, demonstrates exceptional receptor selectivity, with IC50 values of 0.23 nM for hS1P₁, 2000 nM for hS1P₃, 6.5 nM for hS1P₄, and 184 nM for hS1P₅. This compound significantly enhances in vivo phosphorylation efficiency, leading to lymphocyte reduction and a potential decrease in cardiovascular risk. PPI-4955 is applicable for research in immunomodulation and cardiovascular studies.
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