Astrocytes in the medial entorhinal cortex are required for spatial exploration

Area of Science:

• Neuroscience
• Cell Biology
• Cognitive Science

Background:

• Exploration is vital for survival, traditionally linked to neuronal activity.
• The role of astrocytes in regulating exploratory behaviors is largely unknown.

Purpose of the Study:

• To investigate astrocyte involvement in spatial exploratory behaviors.
• To understand how astrocytes in the medial entorhinal cortex contribute to cognitive functions.

Main Methods:

• Utilized fiber photometry and genetically encoded calcium indicators.
• Targeted astrocyte-specific calcium imaging in the medial entorhinal cortex (MECII).
• Monitored astrocytic activity during spatial exploration tasks.

Main Results:

• Spatial exploration activates astrocytes in layer II of the MECII.
• These astrocytic activities integrate visual inputs.
• Calcium transients in MECII astrocytes facilitate exploratory behaviors and MECII neuronal function.

Conclusions:

• Astrocytic activity is crucial for plasticity in MECII neurons and spatial exploration.
• Astrocyte signaling mechanisms are integral to cognitive functions.
• This study highlights astrocytes as key players in environmental exploration and cognitive processes.