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Protective effects of Angelica keiskei extract against TNF-α-induced oxidative stress and vascular inflammation in human umbilical vein endothelial cells

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Angelica keiskei, a perennial herb from Apiaceae family, has been reported to improve diabetes, inhibit thrombosis, alleviate dyslipidemia, and prevent type 2 diabetes, obesity, and atherosclerosis. In this study, the protective effects of A. keiskei extract (AKE) against tumor necrosis factor-alpha (TNF-α)-induced oxidative stress and vascular inflammation in human umbilical vein endothelial cells (HUVECs) were investigated through cell viability analysis, antioxidant enzyme analysis, western blotting, and immunofluorescence staining. The results demonstrated that pretreatment of Angelica keiskei with AKE significantly inhibited the expression of key adhesion molecules such as E-selectin, ICAM-1 and VCAM-1 induced by TNF-α. AKE also showed a substantial reduction in intracellular reactive oxygen species levels and an increase in antioxidant enzyme activity, indicating potential antioxidant capabilities. This study further explained that AKE interfered with the nuclear factor-kappa B (NF-κB) pathway by inhibiting phosphorylation of IκBα and NF-κB, thereby preventing nuclear translocation. Additionally, AKE selectively inhibited the activation of c-Jun N-terminal kinase (JNK) within the mitogen-activated protein kinase (MAPK) pathway, revealing a specific action mechanism. These findings collectively suggest that AKE possesses multi-faceted protective properties, making it a potential therapeutic agent for inflammatory conditions and early atherosclerosis.

Abstract

Angelica keiskei, a perennial herb from Apiaceae family, has been reported to improve diabetes, inhibit thrombosis, alleviate dyslipidemia, and prevent type 2 diabetes, obesity, and atherosclerosis. In this study, the protective effects of A. keiskei extract (AKE) against tumor necrosis factor-alpha (TNF-α)-induced oxidative stress and vascular inflammation in human umbilical vein endothelial cells (HUVECs) were investigated through cell viability analysis, antioxidant enzyme analysis, western blotting, and immunofluorescence staining. The results demonstrated that pretreatment of Angelica keiskei with AKE significantly inhibited the expression of key adhesion molecules such as E-selectin, ICAM-1 and VCAM-1 induced by TNF-α. AKE also showed a substantial reduction in intracellular reactive oxygen species levels and an increase in antioxidant enzyme activity, indicating potential antioxidant capabilities. This study further explained that AKE interfered with the nuclear factor-kappa B (NF-κB) pathway by inhibiting phosphorylation of IκBα and NF-κB, thereby preventing nuclear translocation. Additionally, AKE selectively inhibited the activation of c-Jun N-terminal kinase (JNK) within the mitogen-activated protein kinase (MAPK) pathway, revealing a specific action mechanism. These findings collectively suggest that AKE possesses multi-faceted protective properties, making it a potential therapeutic agent for inflammatory conditions and early atherosclerosis.

참고문헌 (39)

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