Leukotriene B4 Ethanolamide

The effects of Leukotriene B4 (LTB4) are mediated by two known receptors, BLT1 and BLT2. LTB4 is a high affinity ligand for BLT1, and many of its pro-inflammatory effects are believed to be transduced through this receptor. The BLT2 is more enigmatic, in that LTB4 is not a high-affinity ligand, nor is it clear that BLT2 activation promotes inflammation. LTB4 ethanolamide (LTB4-EA) is a theoretical 5-LO metabolite of arachidonoyl ethanolamide (AEA). In CHO cells transfected with human BLTR1, LTB4-EA was a potent antagonist with about three times greater affinity for the receptor than LTB4 (Ki = 1.22 nM versus 3.88 nM). LTB4-EA antagonizes the LTB4-induced contractions of guinea pig lung parenchyma with an EC50 of 10 nM. LTB4-EA thus represents a potential endogenous anti-inflammatory compound functioning as a natural antagonist of BLTR1.Formal Name: N-(2-hydroxyethyl)-5S,12R-dihydroxy-6Z,8E,10E,14Z-eicosatetraenamide. CAS Number: 877459-63-7. Synonyms: LTB4-EA. Molecular Formula: C22H37NO4. Formula Weight: 379.5. Purity: >97%. Formulation: (Request formulation change), A solution in ethanol. Solubility: DMF: 100 mg/ml, DMSO: 100 mg/ml, Ethanol: 100 mg/ml, PBS (pH 7.2): 12 mg/ml. lambdamax: 270 nm. SMILES: CCCCC/C=C\C[C@@H](O)/C=C/C=C\C=C\[C@@H](O)CCCC(=O)NCCO. InChi Code: InChI=1S/C22H37NO4/c1-2-3-4-5-6-9-13-20(25)14-10-7-8-11-15-21(26)16-12-17-22(27)23-18-19-24/h6-11,14-15,20-21,24-26H,2-5,12-13,16-19H2,1H3,(H,23,27)/b8-7+,9-6-,14-10+,15-11-/t20-,21-/m1/s1. InChi Key: DQLVVNIINUTUIU-XLFGVTECSA-N.