An isoflavonoid-enriched extract from Pueraria lobata (kudzu) root protects human umbilical vein endothelial cells against oxidative stress induced apoptosis

详细信息    查看全文

• 作者：Ying Gao^a ; ^{ying.gao@mtsu.edu" class="auth_mail" title="E-mail the corresponding author} ; Xu Wang^b ; ^{wangxubyts@126.com" class="auth_mail" title="E-mail the corresponding author} ; Chunnian He^c ; ^{cnhe@implad.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Atherosclerosis ; Pueraria lobata ; Isoflavonoids ; HUVECs ; Oxidative stress ; Apoptosis
• 刊名：Journal of Ethnopharmacology
• 出版年：2016
• 出版时间：4 December 2016
• 年：2016
• 卷：193
• 期：Complete
• 页码：524-530
• 全文大小：537 K

文摘

Reactive oxygen species (ROS) mediate vascular cell dysfunction and lead to atherosclerosis and other chronic cardiovascular diseases. The root of Pueraria lobata (Willd.) Ohwi, also known as kudzu or Gegen (Chinese name), is one of the most important herbs in traditional Chinese medicine and has been widely used in the treatment of cardiovascular diseases, diabetes, osteonecrosis and neurodegradation diseases. In this study, an ethanol extract from kudzu root was prepared and the in vitro protective effect of the kudzu root extract (KUD) on human umbilical vein endothelial cells (HUVECs) was investigated.

Material and methods

An ethanol extract of dried kudzu root was purified with an AB-8 resin column, and the concentrations of puerarin, daidzin and daidzein in the KUD were determined using UV spectroscopy. HUVECs were pretreated with various concentrations of the KUD with or without rotenone and the viability was assessed by AlamarBlue cell viability assay. Next, HUVECs were pretreated with the KUD and then treated with rotenone, and the levels of ROS generation, apoptosis, and changes of the mitochondrial membrane potential (ΔΨm) in HUVECs were measured using fluorescent staining assay and high-content analysis.

Results

The contents of three major isoflavonoids (puerarin, daidzin and daidzein) were enriched by 7.75–27.51 fold in the extract. The KUD enhanced the proliferation of HUVECs, and protected HUVECs against rotenone-induced oxidative stress and apoptosis. Additionally, the KUD prevented the loss of ΔΨm in HUVECs stimulated by oxidative stress.

Conclusion

We demonstrated that an isoflavonoid-rich extract prepared from kudzu root has the potential to act as a protector for vascular endothelial cells against intracellular ROS mediated apoptosis and mitochondrial damage.