Extracted?from?grape pip;Store?the?product?in?sealed,?cool?and?dry?condition
CAS：29106-49-8
分子式：C30H26O12
分子量：578.52
纯度：98%
存储：Store at -20°C

Background:

Procyanidin B2 is a natural flavonoid, with anti-cancer, antioxidant activities.

Procyanidin B2 shows antiproliferative activity to MCF-7 cells, with an IC50 of 19.21 μM. However, Procyanidin B2 exhibits no effect on DNA-ladder formation[1]. Procyanidin B2 (0.1, 1, 2 μM) inhibits the activation of pyrin domain containing 3 (NLRP3) inflammasome in human umbilical vein ECs (HUVECs), and the inhibition is via suppression of AP-1 activity, and such effect can be abolished by overexpression of c-Jun. Procyanidin B2 (2 μM for 12 h) also reduces ROS in HUVECs[2].

Procyanidin B2 (40, 20, and 10 mg/kg, p.o.) protects against cerebral ischemia-induced infarct volume and brain edema in rats. Procyanidin B2 (40 mg/kg, p.o) also improves functional outcomes, regulates blood-brain barrier (BBB) permeability after cerebral ischemia. Moreover, Procyanidin B2 attenuates cerebral ischemia-induced tight junction degradation, mitochondrial depolarization and intracellular oxidative stress. Procyanidin B2 (40 mg/kg, p.o) increases Nrf2 activation and HO-1, GSTα, and NQO1 protein expression in normal brains in vivo[3].

参考文献:
[1]. Avelar MM, et al. Procyanidin b2 cytotoxicity to mcf-7 human breast adenocarcinoma cells. Indian J Pharm Sci. 2012 Jul;74(4):351-5.
[2]. Yang H, et al. Procyanidin B2 inhibits NLRP3 inflammasome activation in human vascular endothelial cells. Biochem Pharmacol. 2014 Dec 15;92(4):599-606.
[3]. Wu S, et al. Procyanidin B2 attenuates neurological deficits and blood-brain barrier disruption in a rat model of cerebral ischemia. Mol Nutr Food Res. 2015 Oct;59(10):1930-41.