(-)-Epicatechin
(Synonyms: 表儿茶素) 目录号 : GN10461A polyphenol flavonoid with diverse biological activities
Cas No.:490-46-0
Sample solution is provided at 25 µL, 10mM.
Quality Control & SDS
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- Purity: >99.00%
- COA (Certificate Of Analysis)
- SDS (Safety Data Sheet)
- Datasheet
Animal experiment: |
Mice[3]1-year-old, male C57BL/6N mice (n=25) are randomized into four groups. Mice in the (-)-Epicatechin groups 3 and 4 are given 1.0 mg/kg twice a day (morning and evening) for 15 consecutive days, whereas animals in the control groups 1 and 2 receive the vehicle (water). Both (-)-Epicatechin and vehicle are administered via oral gavage[3]. |
References: [1]. Waffo-Téguo P, et al. Potential cancer-chemopreventive activities of wine stilbenoids and flavans extracted from grape (Vitis vinifera) cell cultures. Nutr Cancer. 2001;40(2):173-9. |
(-)-Epicatechin is a flavonoid that increases NO levels and an inducer of pancreatic β-cell regeneration [1] [2].
β cells are a subset of cells in the pancreatic islets and play an important role in regulating glucose homeostasis through the production of insulin.
(-)-Epicatechin is an inducer of pancreatic β-cell regeneration. In murine macrophages, (-)-Epicatechin induced nitrite accumulation induced by interferon-γ/lipopolysaccharide with IC50 value of 0.5 mM. Also, (-)-Epicatechin inhibited nitration of free tyrosine induced by 0.1 and 1 mM peroxynitrite with IC50 values of 6.6 and 28.0 µM, respectively. In HL-60 cells, (-)-Epicatechin inhibited nitration of protein-bound tyrosine induced by phorbol 12-myristate 13-acetate with IC50 value of 10-100 µM [2]. In human endothelial cells (HUVEC), (-)-Epicatechin (0.3-10 µM) increased NO levels, suggesting its vasodilatory properties [3].
In alloxan diabetic rats, (-)-Epicatechin (30 mg/kg) lowered blood sugar and restored the amount of beta-cells against alloxan-induced necrosis of the beta-cell population in the pancreatic islets. In rats, (-)-Epicatechin was non-toxic up to 1 g/kg [1]. In rats, oral administration of (-)-Epicatechin metabolized to 3’-O-methyl-(-)-epicatechin and 4’-O-methyl-(-)-epicatechin [4].
References:
[1]. Chakravarthy BK, Gupta S, Gambhir SS, et al. Pancreatic beta-cell regeneration in rats by (-)-epicatechin. Lancet, 1981, 2(8249): 759-760.
[2]. Wippel R, Rehn M, Gorren AC, et al. Interference of the polyphenol epicatechin with the biological chemistry of nitric oxide- and peroxynitrite-mediated reactions. Biochem Pharmacol, 2004, 67(7): 1285-1295.
[3]. Brossette T, Hundsdörfer C, Kröncke KD, et al. Direct evidence that (-)-epicatechin increases nitric oxide levels in human endothelial cells. Eur J Nutr, 2011, 50(7): 595-599.
[4]. Okushio K, Suzuki M, Matsumoto N, et al. Identification of (-)-epicatechin metabolites and their metabolic fate in the rat. Drug Metab Dispos, 1999, 27(2): 309-316.
Cas No. | 490-46-0 | SDF | |
别名 | 表儿茶素 | ||
化学名 | (2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-2H-chromene-3,5,7-triol | ||
Canonical SMILES | C1C(C(OC2=CC(=CC(=C21)O)O)C3=CC(=C(C=C3)O)O)O | ||
分子式 | C15H14O6 | 分子量 | 290.27 |
溶解度 | DMF: 12.5 mg/ml,DMSO: 12.5 mg/ml,DMSO:PBS(pH7.2) (1:1): 0.5 mg/ml | 储存条件 | Store at -20°C |
General tips | 请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液;一旦配成溶液,请分装保存,避免反复冻融造成的产品失效。 储备液的保存方式和期限:-80°C 储存时,请在 6 个月内使用,-20°C 储存时,请在 1 个月内使用。 为了提高溶解度,请将管子加热至37℃,然后在超声波浴中震荡一段时间。 |
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Shipping Condition | 评估样品解决方案:配备蓝冰进行发货。所有其他可用尺寸:配备RT,或根据请求配备蓝冰。 |
制备储备液 | |||
1 mg | 5 mg | 10 mg | |
1 mM | 3.4451 mL | 17.2253 mL | 34.4507 mL |
5 mM | 0.689 mL | 3.4451 mL | 6.8901 mL |
10 mM | 0.3445 mL | 1.7225 mL | 3.4451 mL |
第一步:请输入基本实验信息(考虑到实验过程中的损耗,建议多配一只动物的药量) | ||||||||||
给药剂量 | mg/kg | 动物平均体重 | g | 每只动物给药体积 | ul | 动物数量 | 只 | |||
第二步:请输入动物体内配方组成(配方适用于不溶于水的药物;不同批次药物配方比例不同,请联系GLPBIO为您提供正确的澄清溶液配方) | ||||||||||
% DMSO % % Tween 80 % saline | ||||||||||
计算重置 |
计算结果:
工作液浓度: mg/ml;
DMSO母液配制方法: mg 药物溶于 μL DMSO溶液(母液浓度 mg/mL,
体内配方配制方法:取 μL DMSO母液,加入 μL PEG300,混匀澄清后加入μL Tween 80,混匀澄清后加入 μL saline,混匀澄清。
1. 首先保证母液是澄清的;
2.
一定要按照顺序依次将溶剂加入,进行下一步操作之前必须保证上一步操作得到的是澄清的溶液,可采用涡旋、超声或水浴加热等物理方法助溶。
3. 以上所有助溶剂都可在 GlpBio 网站选购。