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Embryonic and induced pluripotent stem cells are excellent models for disease research because of their ability to self-renew and differentiate into most cell types. Somatic cells from a patient are isolated and reprogrammed into induced pluripotent stem cells or iPSCs. These iPSCs are later differentiated into the desired cell type, which mirrors the diseased cell of the patient. In this way, disease models have been created for investigating diseases such as Down syndrome, type I diabetes,...
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Neurodegenerative disorders, such as Parkinson's Disease (PD), involve the gradual and irreversible destruction of neurons in particular brain areas. These disorders exhibit standard features like proteinopathies, selective vulnerability of some neurons, and an interaction of intrinsic properties, genetics, and environmental influences in neural injury.
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Stem cells are undifferentiated cells that divide and produce different types of cells. Ordinarily, cells that have differentiated into a specific cell type are post-mitotic—that is, they no longer divide. However, scientists have found a way to reprogram these mature cells so that they “de-differentiate” and return to an unspecialized, proliferative state. These cells are also pluripotent like embryonic stem cells—able to produce all cell types—and are therefore...
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Stem Cell-Based Therapies for Parkinson Disease.

Zhaohui Liu1, Hoi-Hung Cheung1,2

  • 1Faculty of Medicine, School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, China.

International Journal of Molecular Sciences
|November 3, 2020
PubMed
Summary

Parkinson disease (PD) involves the degeneration of dopamine-producing neurons. Stem cell therapies show promise for restoring function in the dopamine-depleted brain, offering new hope for PD treatment.

Keywords:
Parkinson diseasecell transplantationcell-based therapydopamineiPSCstem cell

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Neurology

Background:

  • Parkinson disease (PD) is a neurodegenerative disorder characterized by the loss of dopaminergic neurons in the nigrostriatal pathway.
  • Motor symptoms include tremor, bradykinesia, and rigidity, while non-motor symptoms encompass cognitive and autonomic dysfunction.
  • Current treatments manage symptoms by restoring dopaminergic activity, but a cure remains elusive.

Purpose of the Study:

  • To review the molecular pathogenesis of neurodegeneration in Parkinson disease.
  • To discuss novel therapeutic strategies, focusing on stem cell applications for PD treatment.
  • To highlight future research directions in Parkinson disease therapeutics.

Main Methods:

  • Review of current literature on Parkinson disease pathogenesis and stem cell therapies.
  • Analysis of molecular mechanisms underlying neurodegeneration in PD.
  • Evaluation of stem cell research's contribution to understanding PD and predicting therapeutic efficacy.

Main Results:

  • Stem cell-based therapies offer a promising approach for cell replacement in Parkinson disease.
  • Midbrain dopaminergic neurons can restore neurotransmission and rescue dopamine-depleted striatal regions.
  • Stem cell research aids in understanding PD and evaluating novel neuroprotective agents.

Conclusions:

  • Stem cell research is crucial for advancing Parkinson disease understanding and treatment.
  • Exploratory clinical trials are investigating stem cell applications for PD.
  • Future research should focus on critical areas identified through stem cell studies to develop effective PD therapies.