Inflammatory astrocytes in amyotrophic lateral sclerosis (ALS) represent a specialized reactive astrocyte phenotype that contributes to motor neuron degeneration. These cells are characterized by a neurotoxic "A1" profile that promotes inflammation and fails to provide necessary support to motor neurons[1].
The recognition of inflammatory astrocytes as key drivers of ALS pathogenesis has fundamentally changed our understanding of disease mechanisms. Rather than being passive responders to motor neuron injury, these astrocytes actively contribute to neurodegeneration through the secretion of toxic factors and loss of protective functions.
Inflammatory astrocytes in amyotrophic lateral sclerosis (ALS) represent a specialized reactive astrocyte phenotype that contributes to motor neuron degeneration. These cells are characterized by a neurotoxic profile that promotes inflammation and fails to provide necessary support to motor neurons.
| Taxonomy | ID | Name / Label |
|---|---|---|
| Cell Ontology (CL) | CL:0009002 | inflammatory cell |
| Database | ID | Name | Confidence |
|---|---|---|---|
| Cell Ontology | CL:0009002 | inflammatory cell | Medium |
The "A1" reactive astrocyte signature includes[2]:
The primary mechanism of astrocyte-mediated toxicity in ALS:
| Approach | Target | Status |
|---|---|---|
| Anti-inflammatory drugs | NF-κB, cytokines | Clinical |
| GLT-1 enhancement | Glutamate transport | Failed trials |
| A1 to A2 reprogramming | Phenotype conversion | Preclinical |
| Astrocyte transplantation | Cell replacement | Research |
The study of Inflammatory Astrocytes In Als 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.
Ilieva H, et al. Non-cell autonomous toxicity in ALS: Astrocytes and microglia. Nat Neurosci. 2019. 2019. ↩︎
Liddelow SA, et al. Neurotoxic reactive astrocytes are induced by activated microglia. Nature. 2017. 2017. ↩︎