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(±)-Huperzine A
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。
(±)-Huperzine A图片
CAS NO:120786-18-7
包装与价格：
包装价格(元)
10mM (in 1mL DMSO)电议
5mg电议
10mg电议

产品介绍

(±)-Huperzine A 是传统中草药中提取的活性石松属生物碱，是可逆的乙酰胆碱酯酶（ACE）抑制剂，在中国被广泛的运用于阿尔茨海默病。

Cas No.120786-18-7
别名(±)-石杉碱甲
化学名(5R,9R,E)-5-amino-11-ethylidene-7-methyl-5,6,9,10-tetrahydro-5,9-methanocycloocta[b]pyridin-2(1H)-one
Canonical SMILESC/C=C1[C@@]2(N)C3=C(NC(C=C3)=O)C[C@]/1([H])C=C(C)C2
分子式C15H18N2O
分子量242.32
溶解度DMSO : ≥ 50 mg/mL (206.34 mM)
储存条件Store at -20℃
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

(–)-Huperzine A (HupA) is an acetylcholinesterase (AChE) inhibitor with an IC50 value of 82 nmol/L [1] and acts as an antagonist of the N-methyl-d-aspartate (NMDA) receptor [2].

AChE is the key brain enzyme responsible for the rapid degradation of the neurotransmitter acetylcholine. AChE inhibitors are probably useful in the amelioration of the Alzheimer’s symptomatology [3].

It was found that NMDA markedly reduced AChE activities [4]. In rat dissociated hippocampal neurons, HupA inhibited the NMDA-induced current. In neurons, 100 μM HupA, NMDA-induced currents were 55.7 ± 4.9% of the control values. The binding molecular ratio of NMDA receptor: HupA is 1:1. The inhibition of NMDA receptor by HupA is not competitive [5]. HupA significantly increased the phosphorylation levels of both glycogen synthase kinase (GSK)-3α protein and GSK-3β protein in APPsw-overexpressing cells [2]. Activated GSK-3 consequently decreased acetylcholine (ACh) level in the striatum [6].

Treated with doses of (–)-huperzine A, AChE–/– mice showed no toxic symptoms and had normal levels of AChE. This demonstrated the specificity of (–)-huperzine A as an inhibitor of AChE at the dose used in vivo [7]. In rat whole brain, oral administration of HupA at a dose of 1.5 μmol/kg (3.6 mg/kg) obtained a maximum inhibition of AChE at 60 min and this maximum inhibition was maintained for 360 min [8].

References:
[1]. MA Xiao-Chao, XIN Jian, WANG Hai-Xue, et al. Acute effects of huperzine A and tacrine on rat liver. Acta Pharmacol ogica Sinica, 2003, 24(3):247-250.
[2]. Zhong Ming Qian and Ya Ke. Huperzine A: is it an effective disease-modifying drug for Alzheimer's disease? Frontiers in Aging Neuroscience, 2014, 6:216.
[3]. V. Rajendran, Suo-Bao Rong, Ashima Saxena, et al. Synthesis of a hybrid analog of the acetylcholinesterase inhibitors huperzine A and huperzine B. Tetrahedron Letters, 2001, 42: 5359-5361.
[4]. J. R. Delfs, D. M. Saroff, Y. Nishida, et al. Effects of NMDA and its antagonists on ventral horn cholinergic neurons in organotypic roller tube spinal cord cultures. J. Neural Transm., 1997, 104(1):31-51.
[5]. J. M. Zhang and G. Y. Hu. Huperzine A, a nootropic alkaloid, inhibits N-methyl-D-aspartate-induced current in rat dissociated hippocampal neurons. Neuroscience, 2001, 105(3):663-9.
[6]. L. Zhao, C. B. Chu, J. F. Li, et al. Glycogen synthase kinase-3 reduces acetylcholine level in striatum via disturbing cellular distribution of choline acetyltransferase in cholinergic interneurons in rats. Neuroscience, 2013, 255:203-11.
[7]. Ellen G. Duysen, Bin Li, Sultan Darvesh, et al. Sensitivity of butyrylcholinesterase knockout mice to (–)-huperzine A and donepezil suggests humans with butyrylcholinesterase deficiency may not tolerate these Alzheimer’s disease drugs and indicates butyrylcholinesterase function in neurotransmission. Toxicology, 2007, 233:60-69.
[8]. Rui Wang, Han Yan and Xi-can Tang. Progress in studies of huperzine A, a natural cholinesterase inhibitor from Chinese herbal medicine. Acta Pharmacologica Sinica, 2006, 27:1-26.