The pathophysiological mechanisms for slow and progressive dopaminergic neuronal cell death in Parkinson's disease (PD) are currently unknown: therefore, only limited therapeutic options are available. Dopamine replacement therapy has been the mainstay of antiparkinson treatment for the past three decades. Nevertheless, no real progress has been made to intervene in the progressive neurodegenerative process underlying Parkinson's disease. Glutamate-mediate excitotoxic mechanisms have been suggested to contribute to the progressive neurodegenerative process by leading to excessive activation of cortical glutamatergic input into the basal ganglia. The concept that NMDA receptor blockage could be beneficial in neurodegenerative disorders is pursued actively, to date, has been limited by toxicity of the glutamate antagonists. The current proposal focuses on developing an innocuous neuro-protective agent by indirectly modulating rather than merely blocking the NMDA receptor. In preliminary studies, we have identified two novel strychnine-insensitive glycine (NMDA)/glycine site antagonists acting on the NMDA receptors that are active in attenuating NMDA-induced dopamine neuronal injuries in vitro. These compounds also show neuroprotection in an animal model of PD. The objectives of the current proposal are: (i) to characterize a series of novel quinoxalinediones, which have preferential selectivity for NMDA/glycine sites, for their neuroprotective properties against NMDA and glutamate-induced dopaminergic neurotoxicity in primary mesencephalic neuronal culture, (ii) to further evaluate their effectiveness in attenuating degeneration of dopaminergic neurons in a mouse model of MPTP-induced PD, (iii) to examine the ability of these novel compounds for mitigating the NMDA receptor mediated oxidative stress, (iv) to determine the long-term tolerability of these compounds, and , (v) to investigate the safety and neuroprotective efficacy of these NMDA/ glycine site antagonists in a non-human primate model (marmosets) of PD. Together, this systematic approach should lead to significant advances in the development of a rationale-based neuroprotective therapy for the treatment of Parkinson's disease.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
5R01NS038644-03
Application #
6187742
Study Section
Special Emphasis Panel (ZRG1-BDCN-1 (04))
Program Officer
Heemskerk, Jill E
Project Start
1999-04-01
Project End
2004-03-31
Budget Start
2000-04-01
Budget End
2001-03-31
Support Year
3
Fiscal Year
2000
Total Cost
$234,012
Indirect Cost
Name
University of Chicago
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
225410919
City
Chicago
State
IL
Country
United States
Zip Code
60637
Kanthasamy, Kavin; Gordon, Richard; Jin, Huajun et al. (2011) Neuroprotective effect of resveratrol against methamphetamine-induced dopaminergic apoptotic cell death in a cell culture model of neurotoxicity. Curr Neuropharmacol 9:49-53
Saminathan, Hariharan; Asaithambi, Arunkumar; Anantharam, Vellareddy et al. (2011) Environmental neurotoxic pesticide dieldrin activates a non receptor tyrosine kinase to promote PKCýý-mediated dopaminergic apoptosis in a dopaminergic neuronal cell model. Neurotoxicology 32:567-77
Asaithambi, Arunkumar; Kanthasamy, Arthi; Saminathan, Hariharan et al. (2011) Protein kinase D1 (PKD1) activation mediates a compensatory protective response during early stages of oxidative stress-induced neuronal degeneration. Mol Neurodegener 6:43
Jin, Huajun; Kanthasamy, Arthi; Ghosh, Anamitra et al. (2011) ýý-Synuclein negatively regulates protein kinase Cýý expression to suppress apoptosis in dopaminergic neurons by reducing p300 histone acetyltransferase activity. J Neurosci 31:2035-51
Latchoumycandane, Calivarathan; Anantharam, Vellareddy; Jin, Huajun et al. (2011) Dopaminergic neurotoxicant 6-OHDA induces oxidative damage through proteolytic activation of PKC? in cell culture and animal models of Parkinson's disease. Toxicol Appl Pharmacol 256:314-23
Choi, Christopher J; Anantharam, Vellareddy; Martin, Dustin P et al. (2010) Manganese upregulates cellular prion protein and contributes to altered stabilization and proteolysis: relevance to role of metals in pathogenesis of prion disease. Toxicol Sci 115:535-46
Song, C; Kanthasamy, A; Anantharam, V et al. (2010) Environmental neurotoxic pesticide increases histone acetylation to promote apoptosis in dopaminergic neuronal cells: relevance to epigenetic mechanisms of neurodegeneration. Mol Pharmacol 77:621-32
Kanthasamy, Anumantha; Jin, Huajun; Mehrotra, Suneet et al. (2010) Novel cell death signaling pathways in neurotoxicity models of dopaminergic degeneration: relevance to oxidative stress and neuroinflammation in Parkinson's disease. Neurotoxicology 31:555-61
Afeseh Ngwa, Hilary; Kanthasamy, Arthi; Anantharam, Vellareddy et al. (2009) Vanadium induces dopaminergic neurotoxicity via protein kinase Cdelta dependent oxidative signaling mechanisms: relevance to etiopathogenesis of Parkinson's disease. Toxicol Appl Pharmacol 240:273-85
Ortiz-Ortiz, Miguel A; Morán, José M; Bravosanpedro, Jose M et al. (2009) Curcumin enhances paraquat-induced apoptosis of N27 mesencephalic cells via the generation of reactive oxygen species. Neurotoxicology 30:1008-18

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