title: Failure of acute administration with proteasome inhibitor to provide a model of Parkinson's disease in mice.
abstract: We investigated to determine whether acute administration of proteasome inhibitor can cause dopaminergic cell loss in mice, in comparison with that of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). The four intraperitoneally administrations of MPTP at 1-h intervals to mice decreased significantly the concentration of dopamine, 3,4-dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA) in the striatum after 5 days, in comparison with vehicle-treated animals. In contrast, the three subcutaneously administrations of carbobenzoxy-L-gamma-t-butyl-L-glutamyl-L-alanyl-L-leucinal (PSI) did not show significant changes in the concentration of dopamine, DOPAC and HVA in the striatum after 5 days, in comparison with vehicle-treated animals. Our Western blot analysis also showed that the four administrations of MPTP at 1-h intervals to mice produced a significant reduction of anti-tyrosine hydroxylase antibody (TH) protein levels in the striatum after 5 days after. In PSI-treated mice. In contrast, no significant change of TH protein levels was observed in the striatum 5 days after the final treatment with PSI. Furthermore, a significant decrease of TH protein levels was observed in the striatum of MPTP-treated mice, as compared with PSI-treated animals. The present study demonstrates that the acute treatment with proteasome inhibitor PSI did not cause the dopaminergic neurotoxicity in mice, as compared with acute treatment with MPTP. Thus, our findings suggest that acute proteasome inhibition is not a reliable model for Parkinson's disease.
authors.affiliation: Department of Neurobiology and Therapeutics, Graduate School and Faculty of Pharmaceutical Sciences, The University of Tokushima, 1-78, Sho-machi, Tokushima, 770-8505, Japan.
authors.forename: Naoto
authors.initials: N
authors.lastname: Kadoguchi
authors.forename: Hiroki
authors.initials: H
authors.lastname: Kimoto
authors.forename: Ryohei
authors.initials: R
authors.lastname: Yano
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kato
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Araki
mesh_terms: D015632:1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine / Q000494:pharmacology; D015102:3,4-Dihydroxyphenylacetic Acid / Q000378:metabolism; D000818:Animals; D003342:Corpus Striatum / Q000187:drug effects / Q000201:enzymology / Q000503:physiopathology; D015853:Cysteine Proteinase Inhibitors / Q000633:toxicity; D004195:Disease Models, Animal; D004298:Dopamine / Q000378:metabolism; D004334:Drug Administration Schedule; D006719:Homovanillic Acid / Q000378:metabolism; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D009410:Nerve Degeneration / Q000139:chemically induced / Q000201:enzymology / Q000503:physiopathology; D009474:Neurons / Q000187:drug effects / Q000201:enzymology / Q000473:pathology; D009498:Neurotoxins / Q000494:pharmacology; D009842:Oligopeptides / Q000633:toxicity*; D020734:Parkinsonian Disorders / Q000139:chemically induced* / Q000201:enzymology / Q000503:physiopathology; D046988:Proteasome Endopeptidase Complex / Q000378:metabolism; D061988:Proteasome Inhibitors; D015203:Reproducibility of Results; D013997:Time Factors; D014446:Tyrosine 3-Monooxygenase / Q000187:drug effects / Q000378:metabolism
chemical_list: D015853:Cysteine Proteinase Inhibitors; D009498:Neurotoxins; D009842:Oligopeptides; D061988:Proteasome Inhibitors; C090535:benzyloxycarbonyl-isoleucyl-glutamyl(O-tert-butyl)-alanyl-leucinal; D015102:3,4-Dihydroxyphenylacetic Acid; D015632:1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine; D014446:Tyrosine 3-Monooxygenase; D046988:Proteasome Endopeptidase Complex; D004298:Dopamine; D006719:Homovanillic Acid