Cited by 20Parkinson's Disease Mechanisms and TreatmentsMitochondrial Function and PathologyNuclear Receptors and Signaling

Mitochondrial dysfunction in the striatum of aged chronic mouse model of Parkinson’s disease

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Patki, Gaurav·2009·Frontiers in Aging Neuroscience

Abstract

Mitochondrial oxidative stress and dysfunction has been implicated as a possible mechanism for the onset and progression of Parkinson-like neurodegeneration. However, long-term mitochondrial defects in chronic animal neurodegenerative models have not been demonstrated. In this study, we investigated the function of striatal mitochondria 6 weeks after the induction of a chronic 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) mouse model of Parkinson's disease (MPD). Although severe depression of mitochondrial respiration was observed immediately after acute administrations of MPTP, we failed to detect a significant mitochondrial inhibition in presence of striatal dopamine (DA) deficit 6 weeks after the chronic MPD induction in young adult mice. In contrast, when aged mice were chronically treated with MPTP and at 6 weeks post-treatment, these animals suffered an inhibition of the basal (state 4) and adenosine 5'-diphosphate-stimulated (state 3) respiration and a fall in adenosine triphosphate level in the striatal mitochondria. The aged chronic MPD also brought about a sustained diminution of striatal anti-oxidant enzyme levels including that of superoxide dismutases and cytochrome c. The mitochondrial deficits in the striatum of aged chronic MPD 6 weeks after treatment were further correlated with significant losses of striatal DA, tyrosine hydroxylase, DA uptake transporter, and with impaired movement when tested on a challenging beam. Our findings suggest that MPTP may trigger the neurodegenerative process by obstructing the mitochondrial function; however, striatal mitochondria in young animals may potentially rejuvenate, whereas mitochondrial dysfunction is sustained in the aged chronic MPD. Therefore, the aged chronic MPD may serve as a suitable investigative model for further elucidating the integral relationship between mitochondrial dysfunction and neurodegenerative disorder, and for assessing the therapeutic efficacy of mitochondrial protective agents as potential neuroprotective drugs.

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Crossref · 10.3389/neuro.24.003.2009

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  • The specific down-regulation of mitochondrial processes in aged striatum could help to explain previous observations demonstrating selective vulnerability to mitochondrial toxins and stresses in the striatum of old animals.

    “This specific down-regulation of mitochondrial processes in aged striatum could help to explain previous observations demonstrating selective vulnerability to mitochondrial toxins and stresses in the striatum of old animals (Brouillet et al., 1993; Patki et al., 2009).”

    From Atlas of the aging mouse brain reveals white matter as vulnerable foci (2023) · cites this paper as Patki et al., 2009

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  1. Przedborski S. Jackson-Lewis V. (1998). Mechanisms of MPTP toxicity. Mov. Disord. 13(Suppl. 1), 35– 38 9613716
  2. Wallace D. (1997). Mitochondrial DNA mutations and bioenergetic defects in aging and degenerative diseases. In The Molecular and Genetic Basis of Neurological Disease, Rosenberg R. N. Prusiner S. B. DiMauro S. Barchi R. L., eds (Boston, Butterworth-Heinemann), pp. 237– 269

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Authors
Patki, G.
Affiliations
University of Houston (US)
Corresponding author
Patki, Gaurav
Venue
Frontiers in Aging Neuroscience
Published
2009
Volume
1
Pages
3-3
ISSN
1663-4365 (ISSN-L)
OpenAlex
W2042663107
Cited by
20
References
54
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 1 · 2021: 1 · 2017: 4 · 2015: 1 · 2014: 2 · 2013: 2 · 2012: 2
FWCI
1.28
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Aging Neuroscience (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
National Institute of Neurological Disorders and Stroke (47920, NS47920, R01NS047920)
Topics
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nuclear Receptors and Signaling
Keywords
mitochondrial dysfunction, Parkinson's disease, MPTP mouse model, striatum, aging, mitochondrial respiration, oxidative stress, dopamine depletion, tyrosine hydroxylase, superoxide dismutase, cytochrome c, ATP depletion, neurodegeneration

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