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Abstract Title:

Anti-inflammatory Effects of Aspalathin and Nothofagin from Rooibos (Aspalathus linearis) In Vitro and In Vivo.

Abstract Source:

Inflammation. 2015 Aug ;38(4):1502-16. PMID: 25655391

Abstract Author(s):

Wonhwa Lee, Jong-Sup Bae

Article Affiliation:

Wonhwa Lee

Abstract:

Aspalathin (Asp) and nothofagin (Not) are two major active dihydrochalcones found in green rooibos, which have been reported for their anti-oxidant activity. Here, we investigated the anti-inflammatory effects and underlying mechanisms of Asp and Not against lipopolysaccharide (LPS)-mediated vascular inflammatory responses. The anti-inflammatory activities of Asp and Not were determined by measuring permeability, monocytes adhesion and migration, and activation of pro-inflammatory proteins in LPS-activated human umbilical vein endothelial cells (HUVECs) and mice. We found that each compound inhibited LPS-induced barrier disruption, expression of cell adhesion molecules (CAMs), and adhesion/transendothelial migration of neutrophils to human endothelial cells. Asp and Not also suppressed LPS-induced hyperpermeability and leukocyte migration in vivo. Furthermore, each compound suppressed the production of tumor necrosis factor-α (TNF-α) or interleukin (IL)-6 and the activation of nuclear factor-κB (NF-κB) or extracellular regulated kinases (ERK) 1/2 by LPS. Moreover, treatment with each compound resulted in reduced LPS-induced lethal endotoxemia. These results suggest that Asp and Not posses anti-inflammatory functions by inhibiting hyperpermeability, expression of CAMs, and adhesion and migration of leukocytes, thereby endorsing its usefulness as a therapy for vascular inflammatory diseases.

Study Type : Animal Study, In Vitro Study

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Sayer Ji
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