Spatiotemporal Protein Atlas of Cell Death-Related Molecules in the Rat MCAO Stroke Model

Area of Science:

• Neuroscience
• Pathology
• Pharmacology

Background:

• Ischemic stroke causes brain damage through complex pathological changes.
• Therapies for stroke target various molecules and cells across different time windows.
• Understanding the temporal progression of brain injury is key for effective treatment.

Purpose of the Study:

• To characterize pathophysiological changes in the brain microenvironment at hyperacute, acute, subacute, and chronic phases following ischemic injury.
• To provide spatial and temporal data on brain damage progression in a rat stroke model.
• To inform the timing of therapeutic interventions in preclinical stroke studies.

Main Methods:

• Ischemic stroke induced in rats via middle cerebral artery occlusion.
• Magnetic resonance imaging (MRI) validated ischemic injury.
• Immunohistochemistry used to assess NeuN+ neurons, GFAP+ astrocytes, and Iba1+ microglia.
• Detection of cell death markers: AIF, FAF1, and activated caspase-3.

Main Results:

• Detailed immunohistochemical analysis revealed distinct temporal patterns of neuronal, astrocytic, and microglial changes.
• The study identified the emergence of cell death-related molecules (AIF, FAF1, activated caspase-3) over time.
• Spatial and temporal mapping of brain microenvironment alterations was established.

Conclusions:

• The characterized temporal progression of pathophysiological changes provides critical insights into stroke injury.
• This data supports the investigation of optimal timing for therapeutic treatments in stroke preclinical studies.
• The findings highlight the importance of considering the time window for stroke interventions.