S1P Receptor

Phorbol 12-myristate 13-acetate (PMA) is a natural phorbol ester that acts as an activator of PKC, SphK, and NF-κB, and is commonly used to induce differentiation of THP-1 cells and establish dermatitis models.

Sphingosine-1-phosphate (S1P) is an agonist for S1P1-5 receptors and a ligand for GPR3, GPR6, and GPR12. As an intracellular second messenger, it mobilizes Ca2+ and acts as an extracellular ligand for G-protein coupled receptors. This important lipid mediator is generated from sphingosine or other membrane phospholipids.

SKI-178 is a sphingosine kinase 1 (SphK1) inhibitor with IC50 of 0.1-1.8 μM. It induces prolonged mitosis followed by apoptotic cell death through the intrinsic apoptotic cascade. The sustained activation of CDK1 during prolonged mitosis, mediated by SKI-178 leads to the simultaneous phosphorylation of the prosurvival Bcl-2 family members, Bcl-2 and Bcl-xl, as well as the phosphorylation and subsequent degradation of Mcl-1.

PF-543 (Sphingosine Kinase 1 Inhibitor II), a novel sphingosine-competitive inhibitor of SphK1, inhibits SphK1 with IC50 of 2.0 nM and Ki of 3.6 nM.

Etrasimod (APD334) is a specific and orally available antagonist of the sphingosine-1-phosphate-1 (S1P1) receptor (IC50: 1.88 nM in CHO cells).

Ceranib-2 (3-[(E)-3-(4-hydroxyphenyl)prop-2-enoyl]-4-phenyl-1H-quinolin-2-one) is an inhibitor of ceramidase with an IC50 of 28 μM in SKOV3 cells. Ceranib-2 decreases levels of sphingosine and S1P, induces cell apoptosis and exhibits anticancer activity.

GLPG2938 (1-(2-Ethoxy-6-(trifluoromethyl)pyridin-4-yl)-3-((5-methyl-6-(1-methyl-3-(trifluoromethyl)-1H-pyrazol-4-yl)pyridazin-3-yl)methyl)urea) is a potent and selective antagonist of S1P2.

Opaganib (ABC294640) is an orally active and specific sphingosine kinase-2 (SphK2) inhibitor (IC50: 60 μM).

SEW 2871 is an orally available, highly selective S1P1 agonist with an EC50 of 13.8 nM.It reduces the number of lymphocytes in the blood and is used in studies related to diabetes, Alzheimer's disease, liver fibrosis, and inflammation. It activates ERK, Akt and Rac signaling pathways and induces S1P1 internalization and recycling.

Fingolimod hydrochloride (FTY720) , a novel immune modulator, is a sphingosine 1-phosphate (S1P) antagonist (IC50: 0.033 nM in K562 and NK cells).

BAF312 (Siponimod (BAF-312)), a next-generation S1P receptor modulator, is specific for S1P1 and S1P5 receptors with EC50 of 0.39 nM and 0.98 nM, respectively. The specificity of BAF312 for S1P1 and S1P5 receptors exhibits >1000-fold over S1P2, S1P3 and S1P4 receptors.

SAR-114137 is a histone sphingomyelin kinase inhibitor used in the study of molluscum arteriosum and peripheral neuropathic pain.

Ozanimod (RPC-1063) (RPC1063) is a specific oral S1P Receptor 1 modulator. Ozanimod has been used in trials studying the treatment of Crohn's Disease, Ulcerative Colitis, Multiple Sclerosis, and Relapsing Multiple Sclerosis.

LX-2931(LX-3305) is a sphingosine-1-phosphate cleavage enzyme (S1P) inhibitor for the treatment of rheumatoid arthritis.

K6PC-5 is a ceramide derivative that acts as an activator of sphingosine kinase 1 (SPHK1), inducing a swift and temporary rise in intracellular calcium levels. With its potential applications in skin diseases associated with abnormal keratinocyte function, as well as in studies on neurodegeneration and virus infection, K6PC-5 presents a promising compound for research purposes.

[(3S)-3-amino-4-(3-hexylanilino)-4-oxobutyl]phosphonic acid;hydrobromide is a S1P1 antagonist with Ki of 2.84 μM.

AMG-369 (AMG 247) is an S1P1/S1P5 dual agonist that delays the onset of experimental autoimmune encephalomyelitis in rats. encephalomyelitis in rats.

SLP9101555 is a potent and selective sphingosine kinase 2 (SphK2) inhibitor with a Ki of 90 nM.SLP9101555 has a high affinity for SphK2, which is 200-fold higher than that of SphK1.SLP9101555 dramatically reduces extracellular S1P sphingosine 1-phosphate (S1P) levels.

JTE-013 is an effective and specific antagonist of S1P2. JTE-013 suppresses the specific binding of radiolabeled S1P to human and rat S1P2 (IC50s: 17 nM and 22 nM, respectively).

Fingolimod (FTY-720A) is an antagonist of sphingosine 1-phosphate (S1P) (IC50 of 0.033 nM in K562 and NK cells).

SKI II (SphK-I2) is a highly selective and non-ATP-competitive S1P receptor inhibitor (IC50: 0.5 μM) while exhibiting no inhibitory action on other kinases including PKCα, PI3K, and ERK2.

BMS-960 is an S1P agonist with potential anti-tumour activity for cancer research.

CYM-5520 is a noncompetitive allosteric agonist of S1P2

Ponesimod (ACT-128800) is an orally available sphingosine-1-phosphate receptor 1 (S1PR1, S1P1) agonist with potential immunomodulating activity.