CAS NO: | 36376-47-3 |
包装: | 10mg |
市场价: | 4180元 |
Physical Appearance | Off-white solid |
Storage | Desiccate at RT |
M.Wt | 198.09 |
Cas No. | 36376-47-3 |
Formula | C6H11N3·2HCl |
Solubility | ≥31.3 mg/mL in DMSO |
Chemical Name | 2-(5-methyl-1H-imidazol-4-yl)ethanamine dihydrochloride |
Canonical SMILES | NCCC1=C(C)NC=N1.Cl.Cl |
运输条件 | 蓝冰运输或根据您的需求运输。 |
一般建议 | 为了使其更好的溶解,请用37℃加热试管并在超声波水浴中震动片刻。不同厂家不同批次产品溶解度各有差异,仅做参考。若实验所需浓度过大至产品溶解极限,请添加助溶剂助溶或自行调整浓度。溶液形式一般不宜长期储存,请尽快用完。 |
4-Methylhistamine dihydrochloride(4-Methylhistamine dihydrochloride)是H4受体的选择性激动剂,pEC50值为7.4 ± 0.1(α= 1)[1]。
组胺H4受体(H4R)参与了肥大细胞的化学趋向性以及白细胞的炎症定位[1]。
在转染的细胞中,相对于结合其它组胺受体,4-Methylhistamine dihydrochloride与hH4R结合具有最高的亲和力。4-Methylhistamine dihydrochloride和hH4R之间的相互作用具有较高的选择性,分别是H3R和H2R的100倍以上,是H1R 的100,000倍以上。尽管4-Methylhistamine dihydrochloride对hH4R的亲和力比较低,但它对大鼠和小鼠H4R具有高亲和性,Ki值分别为73和55 nM。JNJ 7777120可以拮抗4-Methylhistamine dihydrochloride对hH4R的激动作用。作为一个完整的H4激动剂,4-Methylhistamine dihydrochloride对大鼠和小鼠H4R的pEC50值分别为5.6 ± 0.1和5.8 ± 0.1[1]。
被禁食18小时后,给予大鼠腹膜内注射单剂量的4-Methylhistamine dihydrochloride。2小时后,关节内注射LPS。经过4-Methylhistamine dihydrochloride和LPS单独处理的两组中TNF-α和NF-κB的表达分别增加,滑液和全血中IKB-α水平下降。此外,IL-1β、TNF-α和NF-κB的mRNA水平显著增加。蛋白质印迹分析结果也证实,经4-Methylhistamine dihydrochloride和LPS处理的组中TNF-α、JAK-1、NF-κB和STAT-3的表达增加。JNJ 7777120完全抑制了膝盖发炎组织中这些物质的增加[2]。
参考文献:
[1]. Lim HD, van Rijn RM, Ling P, et al. Evaluation of histamine H1-, H2-, and H3-receptor ligands at the human histamine H4 receptor: identification of 4-methylhistamine as the first potent and selective H4 receptor agonist. Journal of Pharmacology and Experimental Therapeutics, 2005, 314(3): 1310-1321.
[2]. Ahmad SF, Ansari MA, Zoheir KMA, et al. Regulation of TNF-α and NF-κB activation through the JAK/STAT signaling pathway downstream of histamine 4 receptor in a rat model of LPS-induced joint inflammation. Immunobiology, 2015, 220(7): 889-898.