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Updated: Jun 3, 2026
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Monitoring Astrocyte Reactivity and Proliferation in Vitro Under Ischemic-Like Conditions
Published on: October 21, 2017
Targeting MAPK-dependent pathways to modulate reactive astrocyte pathology in neurodegeneration
Iqra Pervaiz1, Anna S Blazier1, Ivan Nyarko-Danquah1
1Rare and Neurologic Diseases, Sanofi, Cambridge, MA, USA.
Communications Biology
|June 1, 2026
Summary
Reactive astrocytes, implicated in neurodegenerative diseases, show altered molecular profiles and induce neurotoxicity. Targeting MAP kinase signaling offers a potential therapeutic strategy for these conditions.
Area of Science:
- Neuroscience
- Cell Biology
- Molecular Biology
Background:
- Reactive astrocytes are key players in neurodegenerative disease pathogenesis.
- Mechanisms of glial cell interactions in neurodegeneration are not fully understood.
Purpose of the Study:
- To characterize the molecular phenotype of reactive astrocytes in a tri-culture system.
- To identify novel markers and functional regulators of reactive astrocytes.
- To explore therapeutic targets for neurodegenerative diseases.
Main Methods:
- Utilized a tri-culture system with human primary and iPSC-derived astrocytes.
- Performed integrated proteomic and phosphoproteomic analyses.
- Conducted surface marker screening, phenotypic small molecule screening, and single-nucleus RNA sequencing.
Main Results:
- Reactive astrocytes exhibited a molecular phenotype similar to ALS astrocytes.
- Identified dysregulated cytoskeletal remodeling and kinase signaling.
- ICAM-1 was validated as a novel in-vitro marker for reactive astrocytes.
- Reactive astrocytes induced neurotoxicity and altered neuronal activity.
- MAP kinase was identified as a regulator of neurotoxicity.
Conclusions:
- Defined the molecular landscape of reactive astrocytes in a disease-relevant model.
- Established a systems-level framework for studying neurodegeneration.
- Highlighted MAP kinase signaling as a potential therapeutic target.
