title: Grape seed extract given three hours after injury suppresses lipid peroxidation and reduces hypoxic-ischemic brain injury in neonatal rats.
abstract: We have reported that pretreatment with grape seed extract (GSE), a potent antioxidant, is neuroprotective. This study examined whether treatment after injury with GSE is protective. Seven-day-old rat pups had the right carotid artery ligated, and then 2.5 h of 8% oxygen. GSE (50 mg/kg) or vehicle was administered by i.p. initial injection at 5 min to 5 h after reoxygenation, with an additional three doses within 26 h after injury. Brain damage was evaluated by weight deficit of the right hemisphere at 22 d after hypoxia. Treatment at 3 h after reoxygenation reduced brain weight loss from 21.0 +/- 3.3% in vehicle-treated pups (n = 31) to 11.4 +/- 2.8% in treated pups (n = 31, p < 0.05). GSE lowered body temperature, but reduced brain injury even when body temperature was controlled. GSE reduced neurofunctional abnormalities caused by the hypoxia-ischemia (HI). GSE reduced a HI induced increase in 8-isoprostaglandin F2alpha (8-isoPGF2alpha) and reduced an HI-induced increase in the proapoptotic protein c-jun in the brain cortex. GSE up to 3 h after reoxygenation reduces brain injury in rat pups, probably by suppressing lipid peroxidation and the proapoptotic protein c-jun.
authors.affiliation: Department of Pediatrics, University of Mississippi Medical Center, Jackson, Mississippi 39216, USA. yfeng@ped.umsmed.edu
authors.forename: Yangzheng
authors.initials: Y
authors.lastname: Feng
authors.forename: Yi-Ming
authors.initials: YM
authors.lastname: Liu
authors.forename: Michael H
authors.initials: MH
authors.lastname: Leblanc
authors.forename: Abhay J
authors.initials: AJ
authors.lastname: Bhatt
authors.forename: Philip G
authors.initials: PG
authors.lastname: Rhodes
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D000975:Antioxidants / Q000008:administration & dosage; D015237:Dinoprost / Q000031:analogs & derivatives / Q000378:metabolism; D005260:Female; D056604:Grape Seed Extract; D020925:Hypoxia-Ischemia, Brain / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology; D015227:Lipid Peroxidation / Q000187:drug effects*; D008297:Male; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage*; D044945:Proanthocyanidins / Q000008:administration & dosage*; D016755:Proto-Oncogene Proteins c-jun / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley; D012639:Seeds / Q000737:chemistry; D013997:Time Factors; D027843:Vitis / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D056604:Grape Seed Extract; C511402:Grape Seed Proanthocyanidins; D010936:Plant Extracts; D044945:Proanthocyanidins; D016755:Proto-Oncogene Proteins c-jun; C075750:8-epi-prostaglandin F2alpha; D015237:Dinoprost