Salidroside ameliorates endothelial inflammation and oxidative stress by regulating the AMPK/NF-κB/NLRP3 signaling pathway in AGEs-induced HUVECs.

Published on Jan 15, 2020in European Journal of Pharmacology3.263
· DOI :10.1016/J.EJPHAR.2019.172797
Rong Hu6
Estimated H-index: 6
(Southern Medical University),
Mingqing Wang8
Estimated H-index: 8
(Southern Medical University)
+ 7 AuthorsLian-bo Wei13
Estimated H-index: 13
(Southern Medical University)
Abstract Endothelial dysfunction plays important roles in vascular dysfunction under diabetic conditions. The generation of advanced glycation end products (AGEs), which can induce inflammation and oxidative stress, is pivotal in endothelial dysfunction. Salidroside, a major active compound in Rhodiola rosea, exerts protective effects against vascular diseases. To study the effects and mechanism of salidroside in diabetes-induced vascular endothelial dysfunction, an in vitro model was established with AGEs-induced human umbilical vein endothelial cells (HUVECs). Then, cell viability, cell apoptosis, pro-inflammatory cytokines and oxidative biomarkers were tested to determine the effects of salidroside at 10, 50 and 100 μM doses on AGEs induced HUVECs. Additionally, RNA-Seq and bioinformatics analyses were used to search for the underlying mechanism of salidroside. The results showed that salidroside promoted cell viability and significantly alleviated cell apoptosis in AGEs-induced HUVECs. Furthermore, salidroside remarkably decreased the levels of the pro-inflammatory cytokines TNF-α, IL-1β and IL-6 and impeded the expression of VCAM-1 and ICAM-1 induced by AGEs. Additionally, salidroside promoted superoxide dismutase (SOD) activity and increased catalase (CAT) and glutathione peroxidase (GSH-Px) levels while inhibiting the intracellular generation of reactive oxygen species (ROS) and malondialdehyde (MDA) in AGEs-induced HUVECs. Importantly, salidroside alleviated endothelial inflammation and oxidative stress by activating AMPK phosphorylation and inhibiting NF-ĸB p65 and NLRP3 inflammasome activation. Therefore, we used compound C, an accepted AMPK inhibitor, to further demonstrate the mechanism. Interestingly, the phenomenon produced by salidroside was abolished. Our findings suggest that salidroside ameliorates AGEs-induced endothelial inflammation and oxidative stress, partially via the AMPK/NF-κB/NLRP3 signaling pathway.
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