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Oxidative stress and inflammation are considered as two key factors that contribute to the development of atherosclerosis. This study was to investigate the antioxidant capacity of huskless barley and to explore its protective functions through the regulation of the antioxidant defense and inflammatory response in human umbilical vein endothelial cells (HUVEC). The oxygen radical absorbance capacity (ORAC), ferric-reducing antioxidant power (FRAP), and 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) scavenging capacity of water and alkali extracts of the polysaccharides from nine huskless barley varieties were investigated  in vitro . The antioxidant properties of the alkaline extracts were more pronounced than those of the water extracts. The results from the cell model showed that pretreatment of HUVEC with the water or alkaline extracts of the polysaccharides from the huskless barley cultivars QHH and NLGL decreased the levels of reactive oxygen species (ROS), monocyte chemotactic protein 1 (MCP-1), and vascular cell adhesion molecule 1 (VCAM-1) but increased the level of superoxide dismutase (SOD) and maintained cell viability. Huskless barley polysaccharide extracts exhibited the vasodilatory effect of inhibiting angiotensin-converting enzyme (ACE) production. These discoveries revealed the potent protective functions of barley in oxidative damage and a potential role for barley in preventing chronic inflammation in cardiovascular diseases.

Protective Role of Antioxidant Huskless Barley Extracts on TNF-α-Induced Endothelial Dysfunction in Human Vascular Endothelial Cells