title: Nicotinamide attenuates methamphetamine-induced striatal dopamine depletion in rats.
abstract: The aim of the present study was to examine the effects of nicotinamide, a co-factor in the electron transport chain, on the relationship between methamphetamine (MA)-induced striatal dopamine (DA) depletion and energy metabolism change. Four injections of MA (10 mg/kg, i.p.) at 2 h intervals resulted in decreases of 51% and 23%, respectively, in striatal DA and adenosine 5'-triphosphate (ATP) levels 5 days later. Nicotinamide (500 mg/kg, i.p.) treatment prior to each MA injection attenuated the reductions of striatal DA and ATP contents. Nicotinamide had no long-term effects on striatal DA and ATP levels. These findings suggest that energy impairment might play a role in MA-induced DAergic neurotoxicity in the striatum.
authors.affiliation: Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan, Republic of China.
authors.forename: N K
authors.initials: NK
authors.lastname: Huang
authors.forename: F J
authors.initials: FJ
authors.lastname: Wan
authors.forename: C J
authors.initials: CJ
authors.lastname: Tseng
authors.forename: C S
authors.initials: CS
authors.lastname: Tung
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D000818:Animals; D004298:Dopamine / Q000378:metabolism*; D018765:Dopamine Uptake Inhibitors / Q000037:antagonists & inhibitors* / Q000494:pharmacology; D004734:Energy Metabolism / Q000187:drug effects; D008297:Male; D008694:Methamphetamine / Q000037:antagonists & inhibitors* / Q000494:pharmacology; D017072:Neostriatum / Q000187:drug effects / Q000378:metabolism*; D009536:Niacinamide / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D018765:Dopamine Uptake Inhibitors; D009536:Niacinamide; D008694:Methamphetamine; D000255:Adenosine Triphosphate; D004298:Dopamine