(-)-epicatechin
mRNA synthesis
In vitro transcription of capped mRNA with modified nucleotides and Poly(A) tail
Tyramide Signal Amplification (TSA)
TSA (Tyramide Signal Amplification), used for signal amplification of ISH, IHC and IC etc.
Phos Binding Reagent Acrylamide
Separation of phosphorylated and non-phosphorylated proteins without phospho-specific antibody
Cell Counting Kit-8 (CCK-8)
A convenient and sensitive way for cell proliferation assay and cytotoxicity assay
SYBR Safe DNA Gel Stain
Safe and sensitive stain for visualization of DNA or RNA in agarose or acrylamide gels.
Inhibitor Cocktails
Protect the integrity of proteins from multiple proteases and phosphatases for different applications.
(-)-epicatechin是一种类黄酮,可以增加 NO的水平,也是胰岛β细胞再生的诱导剂[1] [2]。
β细胞是胰岛中的一个亚群,在通过产生胰岛素调节葡萄糖的动态平衡中起重要作用。
(-)-epicatechin是胰岛β细胞再生的诱导剂。在小鼠巨噬细胞中,(-)-epicatechin抑制γ干扰素/脂多糖诱导的亚硝酸盐积累,IC50值为0.5 mM。而且,(-)-epicatechin也可以抑制0.1和1 mM过氧化亚硝酸盐(peroxynitrite)诱导的游离酪氨酸的硝化,IC50值分别为6.6和28.0 μM。在HL-60细胞中,(-)-epicatechin抑制佛波醇12-肉豆蔻酸酯13-乙酸酯(phorbol 12-myristate 13-acetate)诱导的蛋白结合酪氨酸的硝化,IC50值为10-100 μM[2]。在人内皮细胞(HUVEC)中,(-)-epicatechin (0.3-10 μM)增加NO的水平,表明其具有血管舒张活性[3]。
在四氧嘧啶(alloxan)诱导的糖尿病大鼠中,(-)-epicatechin (30 mg/kg)降低血糖,恢复胰岛中β细胞的数量,抑制四氧嘧啶诱导的β细胞坏死。在大鼠中,(-)-epicatechin在浓度高达1 g/kg时是无毒的[1]。在大鼠中,(-)-epicatechin口服给药后代谢形成3'-O-甲基-(-)-epicatechin和4'-氧-甲基-(-)-epicatechin[4]。
参考文献:
[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, Hundsd?rfer C, Kr?ncke 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.
Physical Appearance | A solid |
Storage | Store at -20°C |
M.Wt | 290.27 |
Cas No. | 490-46-0 |
Formula | C15H14O6 |
Solubility | insoluble in H2O; insoluble in EtOH; ≥14.5 mg/mL in DMSO |
Chemical Name | (2R,3R)-2-(3,4-dihydroxyphenyl)chroman-3,5,7-triol |
SDF | Download SDF |
Canonical SMILES | O[C@@H]1CC2=C(C=C(O)C=C2O)O[C@@H]1C3=CC=C(O)C(O)=C3 |
运输条件 | 蓝冰运输或根据您的需求运输。 |
一般建议 | 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。 |
质量控制和MSDS
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