title: Grape seed procyanidin extract reduces the endotoxic effects induced by lipopolysaccharide in rats.
abstract: Acute inflammation is a response to injury, infection, tissue damage, or shock. Bacterial lipopolysaccharide (LPS) is an endotoxin implicated in triggering sepsis and septic shock, and LPS promotes the inflammatory response, resulting in the secretion of proinflammatory and anti-inflammatory cytokines such as the interleukins (IL-6, IL-1β, and IL-10) and tumor necrosis factor-α by the immune cells. Furthermore, nitric oxide and reactive oxygen species levels increase rapidly, which is partially due to the activation of inducible nitric oxide synthase in several tissues in response to inflammatory stimuli. Previous studies have shown that procyanidins, polyphenols present in foods such as apples, grapes, cocoa, and berries, have several beneficial properties against inflammation and oxidative stress using several in vitro and in vivo models. In this study, the anti-inflammatory and antioxidant effects of two physiological doses and two pharmaceutical doses of grape seed procyanidin extract (GSPE) were analyzed using a rat model of septic shock by the intraperitoneal injection of LPS derived from Escherichia coli. The high nutritional (75mg/kg/day) and the high pharmacological doses (200mg/kg/day) of GSPE showed anti-inflammatory effects by decreasing the proinflammatory marker NOx in the plasma, red blood cells, spleen, and liver. Moreover, the high pharmacological dose also downregulated the genes Il-6 and iNos; and the high nutritional dose decreased the glutathione ratio (GSSG/total glutathione), further illustrating the antioxidant capability of GSPE. In conclusion, several doses of GSPE can alleviate acute inflammation triggered by LPS in rats at the systemic and local levels when administered for as few as 15 days before the injection of endotoxin.
authors: Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, E-43007 Tarragona, Spain.
authors: Victor
authors: V
authors: Pallarès
authors: Anabel
authors: A
authors: Fernández-Iglesias
authors: Lídia
authors: L
authors: Cedó
authors: Anna
authors: A
authors: Castell-Auví
authors: Montserrat
authors: M
authors: Pinent
authors: Anna
authors: A
authors: Ardévol
authors: Maria Josepa
authors: MJ
authors: Salvadó
authors: Santiago
authors: S
authors: Garcia-Vallvé
authors: Mayte
authors: M
authors: Blay
mesh_terms: D000818:Animals; D044946:Biflavonoids / Q000008:administration & dosage*; D002392:Catechin / Q000008:administration & dosage*; D056604:Grape Seed Extract / Q000008:administration & dosage*; D007249:Inflammation / Q000139:chemically induced / Q000188:drug therapy* / Q000473:pathology; D007378:Interleukins / Q000378:metabolism; D008070:Lipopolysaccharides / Q000494:pharmacology / Q000633:toxicity*; D009569:Nitric Oxide / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects; D044945:Proanthocyanidins / Q000008:administration & dosage*; D051381:Rats; D017382:Reactive Oxygen Species / Q000378:metabolism; D012772:Shock, Septic / Q000139:chemically induced / Q000188:drug therapy; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
chemical_list: D044946:Biflavonoids; D056604:Grape Seed Extract; D007378:Interleukins; D008070:Lipopolysaccharides; D044945:Proanthocyanidins; D017382:Reactive Oxygen Species; D014409:Tumor Necrosis Factor-alpha; D009569:Nitric Oxide; C017674:procyanidin; D002392:Catechin