{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,3]],"date-time":"2026-10-03T14:50:21Z","timestamp":1791039021306,"version":"4.1.0"},"reference-count":41,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2004,10,12]],"date-time":"2004-10-12T00:00:00Z","timestamp":1097539200000},"content-version":"vor","delay-in-days":3694,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Synapse"],"published-print":{"date-parts":[[1994,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>1\u2010methyl\u20104\u2010phenyl\u20101,2,3,6\u2010tetrahydropyridine (MPTP) causes marked depletion of dopamine (DA) levels and reduction in the activity of tyrosine hydroxylase (TH) in the nigrostriatal DA pathway. In the brain, the enzyme monoamine oxidase B converts MPTP to 1\u2010methyl\u20104\u2010phenylpyridinium (MPP<jats:sup>+<\/jats:sup>) which enters DA terminals via DA uptake sites. Within the DA terminals, MPP<jats:sup>+<\/jats:sup> blocks the mitochondrial complex I and causes ATP depletion. This is thought to be the main cause of MPTP\u2010induced terminal degeneration. In addition, reactive oxygen species (ROS) generated after blockade of the complex I as well as those generated due to DA oxidation may participate in MPTP\u2010induced dopaminotoxicity. The present study sought to determine if a single injection of a large dose of MPTP generates ROS. We also sought to determine if these changes as well as changes in DA levels were correlated and age\u2010dependent. Toward that end, we have used C57\/B6N male mice that were 22 days or 12 months old. These animals were injected with a single dose of MPTP (40 mg\/kg, ip). Animals were sacrificed at various times after drug administration. MPTP produced no significant increase in ROS nor decreases in DA or HVA concentrations in the striatum of the younger mice. However, DOPAC concentrations were significantly decreased from 15\u2013120 min after drug administration. In the older mice, MPTP caused significant increases in ROS from the beginning to the end of the study period. DA concentrations were decreased from 60 min onward. DOPAC concentrations were decreased significantly after 15\u2013120 min while HVA concentrations were significantly increased after 60 and 120 min. These data demonstrate that in older mice, a single dose of MPTP can cause increases of ROS which were associated with subsequent decreases in DA concentrations. Younger mice were not similarly affected. These results suggest that MPTP induced neurotoxicity is age\u2010dependent and may be mediated by oxidative stress. \u00a91994 Wiley\u2010Lisa, Inc.<jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"#fn1\"\/><jats:fn><jats:p>This article is a US Government work and, as such, is in the public domain in the United States of America.<\/jats:p><\/jats:fn>\n<\/jats:p>","DOI":"10.1002\/syn.890180105","type":"journal-article","created":{"date-parts":[[2004,12,31]],"date-time":"2004-12-31T22:21:54Z","timestamp":1104531714000},"page":"27-34","source":"Crossref","is-referenced-by-count":110,"title":["MPTP\u2010induced oxidative stress and neurotoxicity are age\u2010dependent: Evidence from measures of reactive oxygen species and striatal dopamine levels"],"prefix":"10.1002","volume":"18","author":[{"given":"Syed F.","family":"Ali","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stanley N.","family":"David","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Glenn D.","family":"Newport","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jean L.","family":"Cadet","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"suffix":"Jr.","given":"William","family":"Slikker","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2004,10,12]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/0006-2952(91)90646-M"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/0891-5849(93)90057-2"},{"key":"e_1_2_1_3_2","first-page":"239","volume":"648","journal-title":"Science"},{"key":"e_1_2_1_4_1","first-page":"637","article-title":"Reactive oxygen species formation as a biomarker of methylmercury and trimethyltin neurotoxicity","volume":"13","author":"Ali S. 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