leukotriene c4 (ltc4)

AZD9898 是一种白三烯-C4 合成酶抑制剂，IC50 为 0.28 nM。 AZD9898 可用于哮喘研究。 AZD9898 减轻 GABA 结合和肝毒性信号。

Nedocromil (FPL 59002) 对多种介质的作用或形成有抑制作用，包括组胺，前列腺素 D2和白三烯 C4。

Leukotriene C4 (LTC4) 是一种类花生酸脂质介质，可调节炎症部位白细胞的募集和功能。Leukotriene C4 是支气管收缩、粘液分泌过多和嗜酸性粒细胞增多的介质，在荨麻疹中具有介导作用。

Pirodomast 是血栓素 A（TXA2）合成酶抑制剂。Pirodomast 能抑制白三烯（LT）D4、C4、E4 的形成和血栓素 B2（TXB2）的活性，但对组胺、甲氧胆碱、血清素、LTC4 或血小板活化因子诱导的豚鼠支气管痉挛的拮抗作用较弱或无效。Pirodomast 在体外对豚鼠气管只有微弱的松弛活性。Pirodomast 是一种潜在的抗过敏化合物，在体外可抑制胰蛋白酶的蛋白水解活性，在体内可阻止抗原诱发过敏绵羊的即时和晚期哮喘反应，抑制抗原诱导的过敏绵羊对组胺和卡巴胆碱的气道高反应性。

CI-949 is an allergic mediator release inhibitor, which inhibits leukotriene C4 D4 (LTC4 LTD4), histamine, and thromboxane B2 (TXB2) release (IC50s: 0.5 μM, 11.4 μM and 0.1 μM).

(S)-Verapamil hydrochloride is an inhibitor of leukotriene C4 (LTC4) and calcein transport by MRP1,and leads to the death of potentially resistant tumor cells.

11-trans Leukotriene C4 (11-trans LTC4) is a C-11 double bond isomer of LTC4. LTC4 undergoes slow temperature-dependent isomerization to 11-trans LTC4 during storage. 11-trans LTC4 is produced in smaller amounts relative to LTC4 in ionophore-stimulated HMC-1 cells (a human mast cell line) and equine eosinophils, but not in human neutrophils or RBL-1 cells. It is nearly equipotent with LTC4 for contraction of guinea pig parenchymal and ileum. In a radioligand binding assay using guinea pig ileum as a cysteinyl leukotriene receptor preparation, the pKis for LTC4 and 11-trans LTC4 were determined to be 6.42 and 6.58, respectively.

Leukotriene C4 (LTC4) is the parent cysteinyl-leukotriene produced by the LTC4 synthase-catalyzed conjugation of glutathione to LTA4. LTC4 is produced by neutrophils, macrophages, and mast cells, and by transcellular metabolism in platelets. It is one of the constituents of slow-reacting substance of anaphylaxis (SRS-A) and exhibits potent smooth muscle contracting activity. LTC4-induced bronchoconstriction and enhanced vascular permeability contribute to the pathogenesis of asthma and acute allergic hypersensitivity. The concentration of LTC4 required to produce marked contractions of lung parenchymal strips and isolated tracheal rings is about 1 nM. LTC4 methyl ester is a more lipid soluble form of LTC4. The biological activity of LTC4 methyl ester has not been reported.

Produced by neutrophils, macrophages, mast cells, and by transcellular metabolism in platelets, leukotriene C4 (LTC4) is the parent cysteinyl leukotriene formed by the LTC4 synthase-catalyzed conjugation of glutathione to LTA4. It is one of the constituents of slow-reacting substance of anaphylaxis (SRS-A) and exhibits potent smooth muscle contracting activity. LTC4, however, is rapidly metabolized to LTD4 and LTE4, which makes the characterization of LTC4 pharmacology difficult. N-methyl Leukotriene C4 (N-methyl LTC4) is a synthetic analog of LTC4 that is not readily metabolized to LTD4 and LTE4.It acts as a potent and selective CysLT2 receptor agonist exhibiting EC50 values of 122 and > 2,000 nM at the human CysLT2 and CysLT1 receptors, respectively. It has essentially the same potency as LTC4 at both the human and murine receptors CysLT2 receptors. N-methyl LTC4 is potent and active in vivo, causing vascular leak in mice overexpressing the human CysLT2 receptor but not in CysLT2 receptor knockout mice.

Leukotriene C4 (14,15-LTC4) is an inflammatory mediator synthesized from arachidonic acid through the actions of 15- and 12-lipoxygenases (LOs), involving intermediates such as 15-HpETE and 14,15-LTA4. Unlike the majority of leukotrienes formed via the 5-LO pathway, 14,15-LTC4 is an eoxin predominantly produced by eosinophils, although mast cells and nasal polyps can also synthesize it. While its physiological roles are not well understood, 14,15-LTC4 exhibits limited contractile activity on guinea pig ileum and pulmonary parenchyma. However, it can increase vascular permeability in human endothelial cell monolayers in vitro with potency comparable to 5-LO-derived leukotrienes, contributing to plasma leakage characteristic of inflammation.

Bilirubin diglucuronide 是 Bilirubin 的代谢物。Bilirubin diglucuronide 可抑制 MRP1 2 介导的 ATP 依赖性白三烯 C4 (LTC4) 在膜囊泡中的转运。