您好,欢迎来到试剂仪器网! [登录] [免费注册]
试剂仪器网
位置:首页 > 产品库 > Dihydromyricetin(Ampelopsin)
立即咨询
咨询类型:
     
*姓名:
*电话:
*单位:
Email:
*留言内容:
请详细说明您的需求。
*验证码:
 
Dihydromyricetin(Ampelopsin)
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。
Dihydromyricetin(Ampelopsin)图片
CAS NO:27200-12-0
规格:≥98%
包装与价格:
包装价格(元)
10mg电议
25mg电议
50mg电议
100mg电议
250mg电议
500mg电议
1g电议

产品介绍
理化性质和储存条件
Molecular Weight (MW)320.25
FormulaC15H12O8
CAS No.27200-12-0
Storage-20℃ for 3 years in powder form
-80℃ for 2 years in solvent
Solubility (In vitro)DMSO: 64 mg/mL (199.8 mM)
Water: 5 mg/mL (20.3 mM)
Ethanol: 64 mg/mL (199.8 mM)
Other info

Chemical Name: 4H-1-Benzopyran-4-one, 2,3-dihydro-3,5,7-trihydroxy-2-(3,4,5-trihydroxyphenyl)-, (2R-trans)-

InChi Key: KJXSIXMJHKAJOD-LSDHHAIUSA-N

InChi Code: InChI=1S/C15H12O8/c16-6-3-7(17)11-10(4-6)23-15(14(22)13(11)21)5-1-8(18)12(20)9(19)2-5/h1-4,14-20,22H/t14-,15+/m0/s1

SMILES Code: O=C1[C@H](O)[C@@H](C2=CC(O)=C(O)C(O)=C2)OC3=CC(O)=CC(O)=C13

SynonymsAmpelopsin; Ampeloptin
实验参考方法
In Vitro

In vitro activity: Dihydromyricetin shows antioxidant activity as an effective scavenger of 1,1-diphenyl-2-picrylhydrazyl radical (DPPH). It also inhibits the increase of lipid peroxidation (LPO) values in linolei acid system catalyzed by FeSO4-edetic acid. DHM (1 μM) as a novel anti-alcohol intoxication medication antagonizes both acute EtOH-induced potentiation of GABA(A)Rs and EtOH exposure/withdrawal-induced GABA(A)R plasticity and increases in GABA(A)R alpha4 subunit expression in hippocampus and cultured neurons.


Kinase Assay: A rapid spectrophotometric assay is used to determine the enzymatic activity for hydantoinase, allantoinase, dihydroorotase, and imidase. Dihydrouracil, 5-propyl-hydantoin, and phthalimide are used as substrates. Unless explicitly stated otherwise, Dihydrouracil (2 mM) is used as the substrate in the standard assay of dihydropyrimidinase. Briefly, the decrease in absorbancy at 230, 248, and 298 nm is measured upon hydrolysis of Dihydrouracil, 5-propyl-hydantoin, and Phthalimide as the substrate at 25°C, respectively. To start the reaction, the purified dihydropyrimidinase (10-70 μg) is added to a 2 mL solution containing the substrate and 100 mM Tris-HCl (pH 8.0). Substrate hydrolysis is monitored with a UV/vis spectrophotometer. The extinction coefficient of each substrate is determined experimentally by direct measurement with a spectrophotometer. The extinction coefficients of Dihydrouracil, 5-propyl-hydantoin, and Phthalimide are 0.683 mM-1cm-1 at 230 nm, 0.0538 mM-1cm-1 at 248 nm, and 3.12 mM-1cm-1 at 298 nm, respectively. The initial rates of change are a function of enzyme concentration within the absorbance range of 0.01-0.18 min-1. A unit of activity is defined as the amount of enzyme catalyzing the hydrolysis of 1 μmol substrate/min, and the specific activity is expressed in terms of units of activity per milligram of enzyme. The kinetic parameters Km and Vmax are determined from a non-linear plot by fitting the hydrolyzing rate from individual experiments to the Michaelis-Menten equation.


Cell Assay: Hippocampus and cortex tissue samples are homogenized in lysis buffer containing 20 mM Tris (pH 7.5), 135 mM NaCl, 2 mM EDTA, 2 mM DTT, 25 mM β-glycerophosphate, 2 mM sodium pyrophosphate, 10% glycerol, 1% Triton X-100, 1 mM sodium orthovanadate, 10 mM NaF, 10 μg/mL aprotinin, 10 μg/mL leupeptin, and 1 mM PMSF for 30 min on ice and centrifuged at 12000×g at 4°C for 30 min. The supernatant is collected and protein quantification is carried out using a BCA kit. The protein samples are boiled in the presence of sample buffer at 95°C for 5 min. The target protein is separated by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), transferred to nitrocellulose membrane, and then probed by corresponding primary and secondary antibodies. Finally, the target protein is visualized by enhanced chemiluminescence (ECL) reagent exposure to X-ray film.

In VivoDihydromyricetin (1 mg/kg, i.p.) counteracts acute alcohol (EtOH) intoxication, and also withdrawals signs in rats including tolerance, increased anxiety, and seizure susceptibity. LD50: Mice 1.41g/kg (i.p.)
Animal modelRats
Formulation & Dosage1 mg/kg, i.p.
References

Yao Xue Xue Bao. 2003 Apr;38(4):241-4; J Neurosci. 2012 Jan 4;32(1):390-401.