title: Ascorbic acid and alpha-tocopherol attenuate methylmalonic acid-induced convulsions.
abstract: The effects of chronic administration of alpha-tocopherol or melatonin, or acute ascorbic acid administration on the convulsant action of methylmalonic acid (MMA) were investigated in adult male rats. Animals were chronically injected with alpha-tocopherol (40 mg kg(-1), i.p.), melatonin (5 mg kg(-1), i.p.) or vehicle for 7 days. Buffered MMA (6 micromol/2 microl) or NaCl (9 micromol/2 microl) was injected intrastriatally and the animals were observed for the appearance of clonic or tonic-clonic convulsions and rotational behavior. Ascorbic acid (100 mg kg(-1), s.c.) was administered 30 min before MMA injection. Alpha-tocopherol and ascorbic acid pretreatment decreased the duration of the convulsive episodes and the rotational behavior elicited by MMA. This study provides evidence that free radical generation may participate in the convulsant effects of methylmalonic acid.
authors.affiliation: Departmento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Brasil.
authors.forename: M R
authors.initials: MR
authors.lastname: Fighera
authors.forename: C M
authors.initials: CM
authors.lastname: Queiroz
authors.forename: M P
authors.initials: MP
authors.lastname: Stracke
authors.forename: M C
authors.initials: MC
authors.lastname: Brauer
authors.forename: L L
authors.initials: LL
authors.lastname: González-Rodríguez
authors.forename: R
authors.initials: R
authors.lastname: Frussa-Filho
authors.forename: M
authors.initials: M
authors.lastname: Wajner
authors.forename: C F
authors.initials: CF
authors.lastname: de Mello
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D000975:Antioxidants / Q000627:therapeutic use*; D001205:Ascorbic Acid / Q000627:therapeutic use*; D003292:Convulsants; D008297:Male; D008764:Methylmalonic Acid / Q000037:antagonists & inhibitors*; D051381:Rats; D017208:Rats, Wistar; D012399:Rotation; D014810:Vitamin E / Q000627:therapeutic use*
chemical_list: D000975:Antioxidants; D003292:Convulsants; D014810:Vitamin E; D008764:Methylmalonic Acid; D001205:Ascorbic Acid