iPSC derived Astrocyte Generation Service

Astrocytes are a major type of glial cell in the central nervous system (CNS). They play vital roles in providing structural and metabolic support to neurons, regulating neurotransmission, modulating synaptic connectivity, and maintaining the blood-brain barrier. Astrocyte dysfunction has been implicated in many neurodegenerative diseases and neurological disorders.

Astrocytes can be derived from human induced pluripotent stem cells (iPSCs) through specific differentiation protocols. iPSCs are stem cells reprogrammed from somatic cells like skin or blood cells back into a pluripotent state. The iPSCs can then be directed to become astrocyte progenitor cells that mature into functional astrocyte-like cells.

Fig. 1 Human iPSC-derived mature astrocytes. (Sonninen, 2020)

Advantages Applications Assays Related Diseases

Key Advantages of iPSC-derived Astrocytes

Renewable sources avoiding the use of primary fetal/animal astrocytes iPSCs provide an ethically uncontroversial, renewable source of human astrocytes for research.	Obtain homogeneous populations of astrocytes Differentiation from clonal iPSC lines can produce pure cultures of defined astrocytes.
Generate patient-specific astrocytes to model diseases Patient-derived iPSC lines enable generating astrocytes with disease-relevant genetic backgrounds.	Study astrocyte biology, function, and neurodevelopmental roles iPSC-astrocytes allow interrogating astrocyte properties and influences on neurogenesis and synaptogenesis.
Screen compounds modulating astrocyte activation/reactivity Enables high-throughput drug screening for new therapeutics modulating harmful astrocyte activation states.

Applications of iPSC-derived Astrocytes in Research

Investigating astrocyte-neuron interactions and signaling Co-culture systems with iPSC-neurons allow for studying how astrocytes influence neuronal function, survival, and connectivity.	Evaluating therapeutic approaches targeting astrocyte dysfunction Screen compounds that modulate harmful astrocyte reactivity states implicated in neurodegeneration.
Studying roles of astrocytes in neurodevelopment and synaptic regulation Examine how astrocyte-secreted factors and astrocyte-neuron signaling impact neurogenesis, synaptogenesis, and pruning.	Modeling astrocyte involvement in neurodegenerative diseases iPSC-derived astrocytes from patients can be used to model astrocyte contributions to diseases like Alzheimer's Disease, Parkinson's Disease, and Amyotrophic lateral sclerosis.

Common Assays Utilize iPSC-derived Astrocytes

Neurodevelopmental assays (Neurite outgrowth, synaptogenesis) Evaluating astrocyte influences on neuronal maturation and synaptic connectivity.	Gene expression analysis and astrocyte signature profiling Transcriptomic studies to characterize astrocyte activation states and responses.
Co-cultures with iPSC-derived neurons and other neural cell types Modeling complex neuron-astrocyte interactions and signaling pathways.	Functional assays (Glutamate uptake, GABA transport, calcium signaling) Assessing key astrocyte functions like neurotransmitter recycling and calcium wave propagation.
Inflammatory response and reactivity assays Measuring pro-inflammatory cytokine secretion and astrocyte activation markers.	Construct 3D BBB model Co-culturing with human endothelial cells and pericytes for drug screening.

Astrocyte Dysfunction is Implicated in

Neurodegenerative diseases (AD, PD, ALS, HD) Reactive astrocytes contribute to neuroinflammation and neurodegeneration via cytokine release and excitotoxicity.	Stroke and brain injury Astrocytes undergo harmful reactive responses after ischemic injury and trauma.
Brain cancer (Glioblastoma) Patient-derived astrocytes can provide models for studying tumor pathogenesis.	Neurodevelopmental disorders (Autism, schizophrenia) Astrocyte dysfunction may disrupt the regulation of synaptic development and pruning.

Reference

Sonninen, Tuuli-Maria et al. "Metabolic alterations in Parkinson's disease astrocytes." Sci Rep. 2020;10(1):14474. Distributed under Open Access license CC BY 4.0. The original image was modified.

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