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The neuropathogenic contributions of lysosomal dysfunction.

Ben A Bahr1, Jennifer Bendiske

  • 1Department of Pharmaceutical Sciences, University of Connecticut, Storrs, CT 06269-2092, USA. Bahr@uconn.edu

Journal of Neurochemistry
|October 23, 2002
PubMed
Summary

Lysosomes are crucial in neurodegeneration, with dysfunction linked to protein aggregation in diseases like Alzheimer's and Parkinson's. Impaired lysosomal function contributes to age-related neurodegenerative pathology and synaptic loss.

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Area of Science:

  • Neurobiology
  • Cell Biology
  • Pathology

Background:

  • Lysosomes are implicated in neurodegenerative diseases.
  • Lysosomal storage disorders result from enzyme deficiencies and cause developmental issues.
  • Protein aggregation and deposition are hallmarks of both lysosomal storage disorders and age-related neurodegenerative diseases.

Purpose of the Study:

  • To review evidence linking lysosomal system alterations to protein deposits in age-related neurodegeneration.
  • To explore the role of lysosomal dysfunction in diseases such as Alzheimer's, Parkinson's, and Huntington's disease.

Main Methods:

  • Review of existing scientific literature.
  • Analysis of studies on lysosomal dysfunction in vitro and in vivo.
  • Examination of the impact of oxidative stress on lysosomal capacity in the aging brain.

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Main Results:

  • Lysosomal dysfunction contributes to protein aggregation (amyloid, tau, alpha-synuclein, huntingtin).
  • Lysosomes are vulnerable to oxidative stress in aging, reducing their processing capacity.
  • Experimental lysosomal dysfunction models replicate key pathological features of neurodegenerative diseases, including synaptic loss.

Conclusions:

  • Lysosomal dysfunction is a significant factor in the pathogenesis of age-related neurodegenerative diseases.
  • Targeting lysosomal pathways may offer therapeutic strategies for neurodegeneration.
  • Understanding lysosomal roles is critical for addressing proteinopathies and synaptic dysfunction.