Induced Pluripotent Stem Cell-Derived Neurons

Induced Pluripotent Stem Cell-Derived Neurons

Overview

Induced Pluripotent Stem Cell-Derived Neurons

Overview

<table class="infobox infobox-cell">
<tr>
<th class="infobox-header" colspan="2">Induced Pluripotent Stem Cell-Derived Neurons</th>
</tr>
<tr>
<td class="label">Taxonomy</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology (CL)</td>
<td>[CL:0000034](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000034)</td>
</tr>
<tr>
<td class="label">Database</td>
<td>ID</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:0000034](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000034)</td>
</tr>
<tr>
<td class="label">Cell Ontology</td>
<td>[CL:0000049](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000049)</td>
</tr>
</table>

Induced Pluripotent Stem Cell Derived Neurons plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

<!-- taxonomy-enrichment --> [@kondo2018]

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Multi-Taxonomy Classification

Taxonomy Database Cross-References

PanglaoDB Marker Cross-References

• Unknown (PanglaoDB):

External Database Links

• [Cell Ontology (CL:0000034)](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000034)
• [OBO Foundry (CL:0000034)](http://purl.obolibrary.org/obo/CL_0000034)
• [Allen Brain Cell Atlas](https://portal.brain-map.org/atlases-and-data/bkp/abc-atlas)
• [CellxGene Census](https://cellxgene.cziscience.com/)
• [Human Cell Atlas](https://www.humancellatlas.org/)
• [PanglaoDB](https://panglaodb.se/)

Taxonomy & Classification

PanglaoDB Marker Cross-References

• Unknown (PanglaoDB):

External Database Links

• [Cell Ontology (CL:0000034)](https://www.ebi.ac.uk/ols4/ontologies/cl/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FCL_0000034)
• [OBO Foundry (CL:0000034)](http://purl.obolibrary.org/obo/CL_0000034)
• [Allen Brain Cell Atlas](https://portal.brain-map.org/atlases-and-data/bkp/abc-atlas)
• [CellxGene Census](https://cellxgene.cziscience.com/)
• [PanglaoDB](https://panglaodb.se/)

Introduction

Induced pluripotent stem cell (iPSC)-derived neurons are patient-specific neural cells generated by reprogramming adult somatic cells (typically fibroblasts or blood cells) back to a pluripotent state, then directing their differentiation into specific neuronal subtypes. This technology has revolutionized neurodegenerative disease research by providing human disease-relevant cellular models that capture patient-specific genetic backgrounds.

Generation Process

Step 1: Reprogramming

Adult somatic cells are reprogrammed using the Yamanaka factors:

• OCT4: Maintains pluripotency
• SOX2: Neural lineage priming
• KLF4: Cellular reprogramming
• c-MYC: Proliferation enhancement

Step 2: Neural Induction

iPSCs are guided toward neural lineage through:

• Dual SMAD inhibition: SB431542 + LDN-193189
• Neuroectoderm specification
• Rosette formation

Step 3: Neuronal Differentiation

Directed differentiation protocols yield specific neuron types:

• Dopaminergic neurons: For Parkinson's disease models
• Motor neurons: For ALS studies
• Cortical neurons: For Alzheimer's disease research
• Forebrain inhibitory neurons: For various applications

Step 4: Maturation

Young neurons require extended culture (months) to achieve:

• Functional synapse formation
• Action potential generation
• Neurotransmitter release capability

Applications in Neurodegeneration

Alzheimer's Disease

• Amyloid pathology: Patient-specific neurons reveal AD-relevant amyloid-beta production
• Tau dysfunction: Direct observation of tau phosphorylation and spreading
• Drug screening: Testing candidate compounds on patient neurons
• APOE effects: Modeling APOE4 risk allele effects

Parkinson's Disease

• Alpha-synuclein: Modeling Lewy body pathology in patient neurons
• LRRK2 mutations: Studying the most common genetic cause of PD
• Mitochondrial dysfunction: Live imaging of mitochondrial defects
• Dopaminergic neurons: Specifically relevant to SNc vulnerability

Amyotrophic Lateral Sclerosis (ALS)

• C9orf72 expansions: Modeling hexanucleotide repeat expansions
• TDP-43 pathology: Observing protein aggregation
• SOD1 mutations: Classic ALS genetic model
• Motor neuron degeneration: Direct study of cell death mechanisms

Frontotemporal Dementia

• tau and TDP-43 pathology: Modeling proteinopathies
• Patient-specific phenotypes: Understanding genetic subtypes

Advantages

Patient-Specific Modeling

• Captures individual genetic variation
• Enables study of sporadic disease
• Personalized medicine applications

Disease-Relevant Cell Types

• Human neurons (not rodent)
• Developmental and disease stage specificity
• Physiological relevance

Therapeutic Screening

• High-throughput drug testing
• Patient-stratified screening
• Biomarker discovery

Challenges and Limitations

Technical Challenges

• Variable reprogramming efficiency between patients
• Incomplete maturation compared to adult neurons
• Reprogramming artifacts and genomic instability
• High cost and labor intensity

Biological Limitations

• Juvenile state of derived neurons
• Lack of aging-associated changes
• Absence of glial interactions in monocultures

Standardization

• Need for harmonized protocols
• Quality control benchmarks
• Reproducibility across lines

Disease Modeling Breakthroughs

iPSC technology has enabled:

• Living models of human neurodegenerative diseases
• Understanding of disease mechanisms inaccessible previously
• Discovery of novel therapeutic targets
• Patient stratification for clinical trials
• Cell-based brain delivery
• Stem cell therapy
• Alzheimer's disease models
• Parkinson's disease models
• Gene therapy

External Links

• [iPSC Repository - Cedars-Sinai](https://ipscblog.cedars-sinai.org/) - Patient-derived iPSC lines
• [Human Cell Atlas - Brain](https://www.humancellatlas.org/) - Single-cell data
• [NIH Stem Cell Information](https://stemcells.nih.gov/) - Stem cell research resources

Overview

Induced Pluripotent Stem Cell Derived Neurons plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

Background

The study of Induced Pluripotent Stem Cell Derived Neurons has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.

Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.