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The results show that a binge dosing regimen of METH to the rat increased plasma and brain ammonia concentrations that were paralleled by evidence of hepatotoxicity. The role of peripheral ammonia in the neurotoxic effects of METH was further substantiated by the demonstration that the enhancement of peripheral ammonia excretion blocked the increases in brain and plasma ammonia and attenuated the long-term depletions of dopamine and serotonin typically produced by METH. Conversely, the localized perfusion of ammonia in combination with METH, but not METH alone or ammonia alone, into the striatum recapitulated the neuronal damage produced by the systemic administration of METH. Furthermore, this damage produced by the local administration of ammonia and METH was blocked by the GYKI 52466 [4-(8-methyl-9<jats:italic>H<\/jats:italic>-1,3-dioxolo[4,5-h][2,3]benzodiazepin-5-yl)-benzamine hydrochloride], an AMPA receptor antagonist. These findings highlight the importance of ammonia derived from the periphery as a small-molecule mediator of METH neurotoxicity and more broadly emphasize the importance of peripheral organ damage as a possible mechanism that mediates the neuropathology produced by drugs of abuse and other neuroactive molecules.<\/jats:p>","DOI":"10.1523\/jneurosci.2530-12.2012","type":"journal-article","created":{"date-parts":[[2012,9,19]],"date-time":"2012-09-19T16:33:16Z","timestamp":1348072396000},"page":"13155-13163","source":"Crossref","is-referenced-by-count":50,"title":["Peripheral Ammonia as a Mediator of Methamphetamine Neurotoxicity"],"prefix":"10.1523","volume":"32","author":[{"given":"Laura E.","family":"Halpin","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bryan 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