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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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Neurodegenerative disorders are progressive diseases that cause irreversible damage and loss to neurons in specific brain areas. Examples of these disorders include Parkinson's disease, Alzheimer's disease, Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS). These disorders share characteristics such as proteinopathies, selective neuronal vulnerability, and a complex interplay between genetic and environmental factors. The primary therapeutic goal for these conditions is...
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The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
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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 cells are undifferentiated cells that divide and produce different cell types. Ordinarily, cells that have differentiated into a specific cell type are terminally differentiated; however, scientists have found a way to reprogram these mature cells so that they dedifferentiate and return to an unspecialized, proliferative state. These cells are pluripotent like embryonic stem cells—able to produce all cell types—and are called induced pluripotent stem cells (iPSCs).
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Updated: Nov 11, 2025

Generation of Induced Neural Stem Cells from Peripheral Mononuclear Cells and Differentiation Toward Dopaminergic Neuron Precursors for Transplantation Studies
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Current Developments in Cell Replacement Therapy for Parkinson's Disease.

Xiaoqian Guo1, Lisha Tang1, Xiangqi Tang1

  • 1Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.

Neuroscience
|March 28, 2021
PubMed
Summary
This summary is machine-generated.

Cell replacement therapy offers a promising approach to combat Parkinson's disease (PD) by restoring dopaminergic neurons. Evaluating various cell sources is crucial for advancing this neurodegenerative disorder treatment.

Keywords:
Parkinson’s diseaseTRANSEUROcell replacement therapycellular reprogrammingfetal ventral mesencephalic tissuestem cells

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Area of Science:

  • Neuroscience
  • Regenerative Medicine
  • Cell Biology

Background:

  • Parkinson's disease (PD) involves the depletion of nigrostriatal pathway neurons, leading to motor symptoms like tremor and rigidity.
  • Current treatments, such as levodopa, manage symptoms but do not halt neurodegeneration.
  • Cell replacement therapy (CRT) aims to restore lost dopaminergic neurons and slow disease progression.

Purpose of the Study:

  • To review advancements in cell sources for Parkinson's disease cell replacement therapy.
  • To analyze the advantages and limitations of various cell sources for potential clinical application.
  • To provide a framework for clinicians and researchers developing cell-based therapies for PD and other neurological disorders.

Main Methods:

  • Review of existing literature on cell sources for Parkinson's disease therapy.
  • Analysis of cell sources including fetal tissue, ESCs, NSCs, MSCs, iPSCs, and induced neural cells.
  • Evaluation of efficacy, safety, and clinical applicability of different cell sources.

Main Results:

  • Multiple cell sources, including ESCs and iPSCs, show potential for generating functional dopaminergic neurons.
  • Fetal ventral midbrain tissue has shown efficacy but faces challenges with ethical concerns and graft-induced dyskinesias.
  • iPSCs and induced neural cells offer potential for autologous grafting, minimizing immune rejection.

Conclusions:

  • CRT holds significant promise for treating Parkinson's disease by addressing the underlying neurodegeneration.
  • Careful consideration of the advantages and limitations of each cell source is essential for successful clinical translation.
  • This review serves as a key reference for advancing cell-based therapies for PD and other neurological conditions.