Abstract
In patients with Parkinson's disease (PD), stem cells can serve as therapeutic agents to restore or regenerate injured nervous system. Here, we differentiated two types of stem cells; mouse embryonic stem cells (mESCs) and protein-based iPS cells (P-iPSCs) generated by non-viral methods, into midbrain dopaminergic (mDA) neurons, and then compared the efficiency of DA neuron differentiation from these two cell types. In the undifferentiated stage, P-iPSCs expressed pluripotency markers as ES cells did, indicating that protein-based reprogramming was stable and authentic. While both stem cell types were differentiated to the terminally-matured mDA neurons, P-iPSCs showed higher DA neuron-specific markers' expression than ES cells. To investigate the mechanism of the superior induction capacity of DA neurons observed in P-iPSCs compared to ES cells, we analyzed histone modifications by genome-wide ChIP sequencing analysis and their corresponding microarray results between two cell types. We found that Wnt signaling was up-regulated, while SFRP1, a counter-acting molecule of Wnt, was more suppressed in P-iPSCs than in mESCs. In PD rat model, transplantation of neural precursor cells derived from both cell types showed improved function. The present study demonstrates that P-iPSCs could be a suitable cell source to provide patient-specific therapy for PD without ethical problems or rejection issues.
Publication types
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Comparative Study
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Cell Differentiation*
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Cell Movement
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Cells, Cultured
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Dopaminergic Neurons / cytology*
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Dopaminergic Neurons / metabolism
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Dopaminergic Neurons / transplantation
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Embryonic Stem Cells / cytology*
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Embryonic Stem Cells / metabolism
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Female
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Gene Expression
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Induced Pluripotent Stem Cells / cytology*
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Induced Pluripotent Stem Cells / metabolism
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Intercellular Signaling Peptides and Proteins / genetics
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Membrane Proteins / genetics
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Mice
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Mice, 129 Strain
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Mice, Inbred C57BL
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Microscopy, Confocal
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Oxidopamine
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Parkinson Disease, Secondary / chemically induced
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Parkinson Disease, Secondary / surgery
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Proteins / metabolism
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Rats
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Rats, Sprague-Dawley
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Reverse Transcriptase Polymerase Chain Reaction
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Treatment Outcome
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Wnt Proteins / genetics
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Wnt Signaling Pathway
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Wnt-5a Protein
Substances
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Intercellular Signaling Peptides and Proteins
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Membrane Proteins
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Proteins
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Sfrp1 protein, mouse
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Wnt Proteins
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Wnt-5a Protein
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Wnt5a protein, mouse
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Oxidopamine
Grants and funding
This study was supported by a grant from the Innovative Research Institute for Cell Therapy (A062260) and the Bio & Medical Technology Development Program of the National Research Foundation funded by the Korean government (MEST) (2010-0020258) and a grant of the Korean Health Technology Research & Development Project, Ministry for Health, Welfare & Family Affairs, Republic of Korea (A100476). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.