Dentate Gyrus Hilar Mosaic (iPSC-Derived)

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1Human neuronal models for drug discovery2019 · Trends Pharmacol Sci · DOI 10.1016/j.tips.2019.03.008Open reference
Dentate Gyrus Hilar Mosaic (iPSC-Derived)
Cell Source Induced pluripotent stem cells (iPSCs)
Lineage Neuron > Dentate gyrus > Hilar mosaic > iPSC-derived
Markers PROX1, CALB2 (Calretinin), DLX2, NeuroD1
Brain Regions Dentate gyrus hilus (iPSC model)
Disease Modeling [Alzheimer's Disease](/diseases/alzheimers-disease), [Temporal Lobe Epilepsy](/diseases/temporal-lobe-epilepsy), Depression

Dentate Gyrus Hilar Mosaic (iPSC-Derived)

Overview

Dentate Gyrus Hilar Mosaic (Ipsc Derived) 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.

Multi-Taxonomy Classification

Taxonomy Database Cross-References

Taxonomy ID Name / Label
Cell Ontology (CL) CL:4023062 dentate gyrus neuron

Morphology & Electrophysiology

  • Morphology: dentate gyrus neuron (source: Cell Ontology)

    • Morphology can be inferred from Cell Ontology classification

Introduction

Dentate gyrus hilar mosaic (iPSC-derived) refers to heterogeneous neuronal populations generated from induced pluripotent stem cells that model the molecular and functional characteristics of neurons found in the dentate gyrus hilus region of the hippocampus [1]. These iPSC-derived neurons provide powerful models for studying human hippocampal development, disease mechanisms, and therapeutic interventions without the limitations of post-mortem tissue.

The dentate gyrus hilus contains diverse neuronal populations including hilar mossy cells, various interneurons, and progenitor cells. iPSC-derived models aim to recapitulate this cellular diversity for research applications [2].

Cellular Composition

Hilar Mossy Cells

These excitatory neurons are key components:

  • Location - Dentate gyrus hilus

  • Markers - CALB2 (calretinin), NMDAR1

  • Function - Dendritic integration, circuit modulation

  • Connectivity - Mossy fiber outputs to CA3

Hilar Interneurons

Various inhibitory populations:

  • Somatostatin (SST) neurons - Local inhibition

  • Parvalbumin (PV) neurons - Fast-spiking

  • CCK interneurons - Diverse functions

Progenitor Populations

iPSC models include:

  • Neural progenitors - Proliferative capacity

  • Immature neurons - Post-mitotic, developing

  • Astrocytes - Supporting glia

Molecular Characteristics

Marker Genes

  • PROX1 - Dentate granule cell marker

  • CALB2 - Calretinin, mossy cell marker

  • DLX2 - Interneuron development

  • NeuroD1 - Neuronal differentiation

  • SST - Somatostatin interneurons

  • PVALB - Parvalbumin interneurons

Functional Properties

iPSC-derived neurons exhibit:

  • Action potential firing - Functional excitability

  • Synaptic connections - Formation of circuits

  • Calcium dynamics - Signaling properties

  • Neurotransmitter production - GABA, glutamate

Disease Modeling Applications

Alzheimer’s Disease

iPSC models of AD-relevant hilar neurons [3]:

  1. Amyloid pathology - Aβ effects on neurons

  2. Tau dysfunction - NFT formation

  3. Synaptic deficits - Connectivity changes

  4. Electrophysiology - Functional impairments

Temporal Lobe Epilepsy

Modeling seizure-related changes:

  1. Hyperexcitability - Increased firing

  2. Network dysfunction - Altered circuits

  3. Mossy cell loss - Characteristic pathology

  4. Therapeutic screening - Drug testing

Depression

Hilar neuron involvement:

  1. Stress responses - Glucocorticoid effects

  2. Neuroplasticity - Morphological changes

  3. Circuit dysfunction - Mood-related circuits

Research Applications

Disease Mechanisms

iPSC-derived hilar neurons enable:

  1. Genetic studies - Patient-derived cells

  2. Pathophysiology - Disease mechanisms

  3. Drug screening - Therapeutic compounds

  4. Personalized medicine - Patient-specific models

Developmental Studies

Understanding hippocampal development:

  1. Neurogenesis - Adult hippocampal neurogenesis

  2. Migration - Cell positioning

  3. Differentiation - Cell fate decisions

  4. Circuit formation - Connectivity

Advantages of iPSC Models

Human Relevance

  • Human neurons - Species-specific features

  • Patient genetics - Disease-relevant backgrounds

  • Accessibility - Living neural tissue

Experimental Control

  • Environmental manipulation - Controlled conditions

  • Genetic engineering - Targeted modifications

  • Temporal control - Developmental staging

Therapeutic Applications

  • Drug discovery - High-throughput screening

  • Toxicology testing - Safety assessment

  • Regenerative approaches - Cell therapy

Limitations and Challenges

Model Constraints

Current limitations include:

  1. Immaturity - fetal-like vs adult state

  2. Regional specification - Achieving precise identity

  3. Circuit integration - Limited network formation

  4. Variability - Line-to-line differences

Technical Considerations

  • Differentiation protocols - Optimization needs

  • Characterization - Comprehensive validation

  • Reproducibility - Consistent results

Overview

Dentate Gyrus Hilar Mosaic (Ipsc Derived) 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 Dentate Gyrus Hilar Mosaic (Ipsc Derived) 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.

References

  1. Human neuronal models for drug discovery 2019 · Trends Pharmacol Sci · DOI 10.1016/j.tips.2019.03.008

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