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MEG(sulfate)
本产品不向个人销售,仅用作科学研究,不用于任何人体实验及非科研性质的动物实验。
MEG(sulfate)图片
CAS NO:3979-00-8
包装与价格:
包装价格(元)
5mg电议
10mg电议
50mg电议
100mg电议

产品介绍
MEG (Mercaptoethylguanidine) hemisulfate 是一种有效且选择性的诱导型 NO 合酶 (iNOS) 抑制剂,EC50 为 11.5、110 和 60 μ;M 分别用于组织匀浆中的 iNOS、ecNOS 和 bNOS。
Cas No.3979-00-8
别名Mercaptoethylguanidine hemisulfate
化学名(2-mercaptoethyl)-guanidine sulfate
Canonical SMILESN/C(N([H])CCS)=N/[H].O=S(O)(O)=O
分子式[C3H9N3S]2 · H2SO4
分子量336.4
溶解度≤10mg/ml in PBS(pH7.2)
储存条件Store at 4℃
General tipsFor obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.
Shipping ConditionEvaluation sample solution : ship with blue ice
All other available size: ship with RT , or blue ice upon request
产品描述

MEG is a selective inhibitor of the inducible NO synthase (iNOS) [1].

NO synthase catalyses the oxidation of the amino acid L-arginine to citrulline and NO. Low concentrations of NO stimulate guanylate cyclase activity and trigger the formation of cyclic GMP (cGMP), an important messenger mediating physiological functions of NO such as vascular homeostasis. At higher concentrations, NO produced by iNOS interact with thiol groups or transition-metalcontaining proteins and can alter protein function or initiate gene expression to protect cells [2].

In vitro: In tissue homogenates, the EC50 values of MEG for inhibition of iNOS (LPS-treated rat lung), eNOS (bovine endothelial), and nNOS (rat brain) were 11.5, 110, and 60 μM, respectively [1]. MEG reduced nitrite/nitrate concentrations in the exudate and the activity of the inducible isoform of NO synthase in the lung ex vivo. In the inflamed tissues, MEG reduced the appearance of nitrotyrosine immunoreactivity [3].

In vivo: Mercaptoethylguanidine (MEG) slightly decreased the mean arterial blood pressure (MAP) in control rats. In endotoxin-treated rats, MEG increased MAP and restored 80% of the endotoxin-induced fall in MAP [1]. High doses of MEG (30–60 mg/kg) decreased MAP in normal rats [1]. In two models of acute inflammation, when given at 25 μg/paw in the paw edema model and 10 mg/kg in the pleurisy model, MEG inhibited the inflammatory response [3].

References:
[1] Southan G J, Zingarelli B, O'Connor M, et al.  Spontaneous rearrangement of aminoalkylisothioureas into mercaptoalkylguanidines, a novel class of nitric oxide synthase inhibitors with selectivity towards the inducible isoform[J]. British journal of pharmacology, 1996, 117(4): 619-632.
[2] Beck K F, Eberhardt W, Frank S, et al.  Inducible NO synthase: role in cellular signalling[J]. Journal of Experimental Biology, 1999, 202(6): 645-653.
[3] Cuzzocrea S, Zingarelli B, Hake P, et al.  Antiinflammatory effects of mercaptoethylguanidine, a combined inhibitor of nitric oxide synthase and peroxynitrite scavenger, in carrageenan-induced models of inflammation[J]. Free Radical Biology and Medicine, 1998, 24(3): 450-459.