title: Ecklonia cava extracts inhibit lipopolysaccharide induced inflammatory responses in human endothelial cells.
abstract: Ecklonia cava (EC) is a brown alga that evidences radical scavenging, bactericidal, tyrosinase inhibitory and protease inhibitory activities. However, the antiinflammatory effects in human endothelial cells and its molecular mechanism remain poorly understood. In this study, we attempted to determine whether pretreatment with EC extracts induce a significant inhibition of antiinflammatory activities in lipopolysaccharide (LPS) induced human endothelial cells. We found that each EC extract inhibits LPS induced barrier permeability, expression of cell adhesion molecules, monocytes adhesion, and transendothelial migration to human endothelial cells. Further studies revealed that EC extracts suppress the production of tumor necrosis factor-alpha (TNF-alpha) and activation of nuclear factor-kappa B (NF-kappaB). Particularly, the antiinflammatory effects of ethyl acetate (EtOAc) and butanol (n-BuOH) extracts were better than those of other extracts. Collectively, these results suggest that EC extracts possess barrier integrity activity, inhibitory activity on cell adhesion and migration to endothelial cells by blocking the activation of NF-kappaB expression and production of TNF-alpha, thereby endorsing its usefulness as therapy for vascular inflammatory diseases.
authors.affiliation: Department of Herbal Medicinal Pharmacology, College of Herbal Bio-Industry, Daegu Haany University, 290 Yugok-dong, Gyeongsan-si, Gyeongsangbuk-do 712-715, Republic of Korea.
authors.forename: Tae Hoon
authors.initials: TH
authors.lastname: Kim
authors.forename: Jong-Sup
authors.initials: JS
authors.lastname: Bae
mesh_terms: D002448:Cell Adhesion; D002461:Cell Line, Transformed; D004727:Endothelium / Q000166:cytology / Q000187:drug effects*; D006801:Humans; D007249:Inflammation / Q000517:prevention & control*; D008070:Lipopolysaccharides / Q000633:toxicity*; D016328:NF-kappa B / Q000378:metabolism; D000459:Phaeophyceae / Q000737:chemistry*; D010936:Plant Extracts / Q000494:pharmacology*; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
chemical_list: D008070:Lipopolysaccharides; D016328:NF-kappa B; D010936:Plant Extracts; D014409:Tumor Necrosis Factor-alpha