title: Ascorbic acid-deficient condition alters central effects of methamphetamine.
abstract: Effects of multiple doses of methamphetamine (METH) were examined in normal and ascorbic acid-deficient (scorbutic) guinea pigs. METH-induced decreases of striatal serotonin concentrations were completely antagonized in scorbutic animals. Elevations of nigral substance P-like immunoreactivity also differed significantly in METH-treated scorbutic compared to METH-treated normal animals. Various lines of evidence indicate that dopamine is an essential mediator of METH-induced effects in both serotonergic and substance P systems in the brain areas examined; however, results from the present study indicate that, along with dopamine, ascorbic acid also plays a role in mediating the effects of METH in the central nervous system.
mesh_terms: D000818:Animals; D001206:Ascorbic Acid Deficiency / Q000378:metabolism*; D001921:Brain / Q000187:drug effects* / Q000378:metabolism; D003342:Corpus Striatum / Q000187:drug effects / Q000378:metabolism; D004298:Dopamine / Q000378:metabolism; D005260:Female; D006168:Guinea Pigs; D008694:Methamphetamine / Q000494:pharmacology*; D012701:Serotonin / Q000378:metabolism; D013373:Substance P / Q000378:metabolism; D013378:Substantia Nigra / Q000187:drug effects / Q000378:metabolism
chemical_list: D012701:Serotonin; D013373:Substance P; D008694:Methamphetamine; D004298:Dopamine