ltb4-in-1

LTB4-IN-1 (Anti-inflammatory agent 2) 是白三烯 (LTB4) 合成抑制剂，IC50 为 70 nM。

Darbufelone mesylate (CI-1004 mesylate) 对细胞中 PGF2α 和 LTB4 产生有抑制作用。Darbufelone mesylate 对 PGHS-2 有抑制作用，IC50 值为 0.19 μM，对 PGHS-1 的IC50 值为 20 μM。

Lipid-derived lipoxins are produced at the site of vascular and mucosal inflammation where they down-regulate polymorphonuclear leukocyte recruitment and function. 15(R)-Lipoxin A4 (15(R)-LXA4) is derived from the aspirin-triggered formation of 15(R)-HETE from arachidonic acid. [1] [2] 15(R)-LXA4 inhibits LTB4-induced chemotaxis, adherence, and transmigration of neutrophils with twice the potency of LXA4 demonstrating activity in the nM range.[2] [3] The anti-inflammatory effects of aspirin may be ascribed in part to the ability of 15(R)-LXA4 to regulate leukocyte function.[4] 15(R)-LXA4 is reported to promote resolution of inflammation in LPS-treated stromal cells derived from intermediate-stage diseased supraspinatus tendons as evidenced by increased expression of the STAT-6 pathway target genes, ALOX15 and CD206.[5]

Lipoxin A4 methyl ester (LXA4 methyl ester) is a more lipid soluble, prodrug formulation of the transcellular metabolite LXA4. LXA4 is a trihydroxy fatty acid containing a conjugated tetraene, produced by the metabolism of 15-HETE or 15-HpETE with human leukocytes.[1] LXA4 is equipotent to leukotriene B4 (LTB4) in inducing superoxide generation in human neutrophils at 0.1 μM.[2] LXA4 is associated with several other biological functions including leukocyte activation, chemotaxis effects, natural killer cell inhibition, and monocyte migration and adhesion.[2],[3],[4]

Ricinelaidic acid is a 12-hydroxy fatty acid and an antagonist of leukotriene B4 (LTB4) receptors (Ki = 2 μM in porcine neutrophil membranes). It inhibits chemotaxis and calcium flux induced by LTB4 in isolated human neutrophils (IC50s = 10 and 7 μM, respectively). Ricinelaidic acid (1 mg/kg, i.v.) inhibits bronchoconstriction induced by LTB4 in rats by 46%.

LTB4-IN-2（Compound 6x）是一种选择性的5-脂氧合酶激活蛋白（FLAP）抑制剂，旨在抑制白三烯B4（LTB4）的形成（IC50：1.15 μM），适用于抗炎研究。

Prostaglandin E2抑制剂3是一种microsomal prostaglandin E合酶-1 (mPGES-1; IC50 = 0.2 µM)的抑制剂，相较于COX-1、COX-2、5-lipoxygenase (5-LO)和soluble epoxide hydrolase (sEH)，在10 µM的无细胞试验中表现出对mPGES-1的选择性。在10 µM和1 µM的浓度下，该抑制剂能抑制A549细胞中IL-1β诱导的PGE2生成以及在J774A.1巨噬细胞中，LPS诱导的IL-6和PGE2生成。同时，它还能抑制由钙离子载体A23187单独或结合花生四烯酸和A23187诱导的5-LO产物形成，包括白三烯B4 (LTB4) 和5-H(p)ETE（IC50s分别为4.9和5.2 µM）。在体内，10 mg/kg剂量的Prostaglandin E2抑制剂3能防止在zymosan诱导的小鼠腹膜炎模型中白细胞渗入腹腔液中。

AM679 is a potent and selective FLAP inhibitor with IC50s of 2.2 nM 0.6 nM 154 nM for FLAP binding hLA hWB respectively. IC50 value: 2.2 nM 0.6 nM 154 nM(FLAP binding hLA hWB) [1] AM679 showed an improved CYP inhibition profile (IC50 3A4 = 16.7 lM, 2C9 =

1'-Ethylascorbigen releases ascorbic acid in acidic solution results in an increase in the cells' ability to produce PGE2 & LTB4. It has been shown to inhibit the growth of experimental murine tumors.

Amelubant (BIIL 284) is a prodrug of active metabolites BIIL 260 and BIIL 315 and exhibits anti-inflammatory activity. It is a potent, oral, long-acting LTB4 receptor antagonist with negligible binding to the receptor, displaying Kis of 221 nM and 230 nM.

(±)14(15)-EET is a metabolite of arachidonic acid that is formed via epoxidation of arachidonic acid by cytochrome P450.[1],[2] It prevents increases in leukotriene B4, ICAM-1, and chemokine (C-C motif) ligand 1 (CCL2) induced by oxidized LDL in primary rat pulmonary artery endothelial cells (RPAECs) when used at a concentration of 1 μM.[3] (±)14(15)-EET induces dilation of preconstricted isolated canine coronary arterioles (EC50 = 0.2 pM).[4] It reduces myocardial infarct size as a percentage of the area at risk in a canine model of ischemia-reperfusion injury induced by left anterior descending coronary artery (LAD) occlusion when administered at a dose of 0.128 mg kg prior to occlusion or reperfusion.[5] Reference：[1]. Chacos, N., Falck, J.R., Wixtrom, C., et al. Novel epoxides formed during the liver cytochrome P-450 oxidation of arachidonic acid. Biochem. Biophys. Res. Commun. 104(3), 916-922 (1982).[2]. Oliw, E.H., Guengerich, F.P., and Oates, J.A. Oxygenation of arachidonic acid by hepatic monooxygenases. Isolation and metabolism of four epoxide intermediates. J. Biol. Chem. 257(7), 3771-3781 (1982).[3]. Jiang, J.-X., Zhang, S.-J., Xiong, Y.-K., et al. EETs attenuate ox-LDL-induced LTB4 production and activity by inhibiting p38 MAPK phosphorylation and 5-LO BLT1 receptor expression in rat pulmonary arterial endothelial cells. PLoS One 10(6), e0128278 (2015).[4]. Oltman, C.L., Weintraub, N.L., VanRollins, M., et al. Epoxyeicosatrienoic acids and dihydroxyeicosatrienoic acids are potent vasodilators in the canine coronary microcirculation. Circ. Res. 83(9), 932-939 (1998).[5]. Nithipatikom, K., Moore, J.M., Isbell, M.A., et al. Epoxyeicosatrienoic acids in cardioprotection: Ischemic versus reperfusion injury. Am. J. Physiol. Heart Circ. Physiol. 291(2), H537-H542 (2006).