title: Nanoparticulated quercetin in combating age related cerebral oxidative injury.
abstract: Reactive oxygen species e.g. O(2)(*-), H(2)O(2) and *OH generated by the induction of oxidative stress exert a potential threat on the activity of endogenous antioxidant enzymes and substantially influence the aging process and age-dependant neuropathology. Chemical antioxidant is almost ineffective in protecting neuronal cells from oxidative damage as Blood Brain Barrier exists in between blood and brain interstitial fluid that restricts undegradable influx from the circulation into cerebral region. Quercetin (QC), a flavonoidal antioxidant is known as a potent antioxidant for its polyphenolic configuration. Formulation of QC in polylactide nanocapsule has been done and the efficacy of this vesicular flavonoid has been tested against cerebral ischemia induced oxidative damage in young and old rat brains. Antioxidant potential of QC loaded in nanocapsule (QC 7.2 mmol/kg b.wt., size 50 nm) was investigated by an in vivo model of cerebral ischemia and reperfusion on Sprague Dawley young (2 months, b.wt. 160-180 g) and aged (20 months, b.wt. 415-440 g) rats. Diene level, the index of lipid peroxidation and GSSG/GSH ratio were found to be higher in normal aged, compared to normal young rat brain. Endogenous antioxidants activities were lower in aged rat brain compared to young. Further reduction of these antioxidants were observed in aged rat brain by the induction of cerebral ischemia - reperfusion. Nanocapsule encapsulated QC treatment resulted a significant protection to endogenous antioxidant enzymes against ischemia induced oxidative damage in neuronal cells of young and old rats.
authors.affiliation: Biomembrane Division, Indian Institute of Chemical Biology, Jadavpur, Kolkata, India.
authors.forename: Sanchari
authors.initials: S
authors.lastname: Das
authors.forename: Ardhendu K
authors.initials: AK
authors.lastname: Mandal
authors.forename: Aparajita
authors.initials: A
authors.lastname: Ghosh
authors.forename: Subhamay
authors.initials: S
authors.lastname: Panda
authors.forename: Nirmalendu
authors.initials: N
authors.lastname: Das
authors.forename: Sibani
authors.initials: S
authors.lastname: Sarkar
mesh_terms: D000375:Aging / Q000378:metabolism*; D000818:Animals; D000975:Antioxidants / Q000008:administration & dosage*; D001812:Blood-Brain Barrier; D001921:Brain / Q000187:drug effects* / Q000378:metabolism*; D002545:Brain Ischemia / Q000188:drug therapy / Q000378:metabolism; D002374:Catalase / Q000378:metabolism; D005978:Glutathione / Q000378:metabolism; D019803:Glutathione Disulfide / Q000378:metabolism; D015227:Lipid Peroxidation / Q000187:drug effects; D008297:Male; D053769:Nanocapsules / Q000737:chemistry; D018384:Oxidative Stress / Q000187:drug effects*; D011091:Polyesters; D011794:Quercetin / Q000008:administration & dosage*; D051381:Rats; D017207:Rats, Sprague-Dawley; D015427:Reperfusion Injury / Q000188:drug therapy / Q000378:metabolism; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D000975:Antioxidants; D053769:Nanocapsules; D011091:Polyesters; C033616:poly(lactide); D011794:Quercetin; D002374:Catalase; D013482:Superoxide Dismutase; D005978:Glutathione; D019803:Glutathione Disulfide