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α‐Phenyl‐N‐ tert ‐butyl nitrone attenuates methamphetamine‐induced depletion of striatal dopamine without altering hyperthermia

α‐Phenyl‐N‐ tert ‐butyl nitrone attenuates methamphetamine‐induced depletion of striatal dopamine... Methamphetamine (MA) administration to adult rats (4 × 10 mg/kg s.c.) induces neurotoxicity predominately characterized by a persistent reduction of neostriatal dopamine (DA) content. Hyperthermia following MA administration potentiates the resulting DA depletion. DA‐derived free radicals are postulated to be a mechanism through which MA‐induced neurotoxicity is produced. The spin trapping agent PBN reacts with free radicals to form nitroxyl adducts, thereby preventing damaging free radical reactions with cellular substrates. MA with saline pretreatment (Sal‐MA) reduced neostriatal DA by 55% (P < 0.01 vs. Sal‐Sal). MA with PBN pretreatment (PBN‐MA) at 36 or 60 mg/kg reduced neostriatal DA by 36 and 22%, respectively (P < 0.05 and P < 0.01 vs. Sal‐MA) indicating partial protection. PBN pretreatment did not alter MA‐induced hyperthermia. Thus, PBN does not attenuate MA‐induced neurotoxicity by reducing MA‐induced hyperthermia. These results support a role for free radicals in the generation of MA‐induced dopaminergic neurotoxicity. © 1996 Wiley‐Liss, Inc. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Synapse Wiley

α‐Phenyl‐N‐ tert ‐butyl nitrone attenuates methamphetamine‐induced depletion of striatal dopamine without altering hyperthermia

Synapse , Volume 24 (2) – Oct 1, 1996

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References (49)

Publisher
Wiley
Copyright
Copyright © 1996 Wiley‐Liss, Inc.
ISSN
0887-4476
eISSN
1098-2396
DOI
10.1002/(SICI)1098-2396(199610)24:2<173::AID-SYN9>3.0.CO;2-C
Publisher site
See Article on Publisher Site

Abstract

Methamphetamine (MA) administration to adult rats (4 × 10 mg/kg s.c.) induces neurotoxicity predominately characterized by a persistent reduction of neostriatal dopamine (DA) content. Hyperthermia following MA administration potentiates the resulting DA depletion. DA‐derived free radicals are postulated to be a mechanism through which MA‐induced neurotoxicity is produced. The spin trapping agent PBN reacts with free radicals to form nitroxyl adducts, thereby preventing damaging free radical reactions with cellular substrates. MA with saline pretreatment (Sal‐MA) reduced neostriatal DA by 55% (P < 0.01 vs. Sal‐Sal). MA with PBN pretreatment (PBN‐MA) at 36 or 60 mg/kg reduced neostriatal DA by 36 and 22%, respectively (P < 0.05 and P < 0.01 vs. Sal‐MA) indicating partial protection. PBN pretreatment did not alter MA‐induced hyperthermia. Thus, PBN does not attenuate MA‐induced neurotoxicity by reducing MA‐induced hyperthermia. These results support a role for free radicals in the generation of MA‐induced dopaminergic neurotoxicity. © 1996 Wiley‐Liss, Inc.

Journal

SynapseWiley

Published: Oct 1, 1996

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