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Related Experiment Video

Updated: Sep 12, 2025

Preparation of Parasagittal Slices for the Investigation of Dorsal-ventral Organization of the Rodent Medial Entorhinal Cortex
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Entorhinal cortex layer III Adgrl2 expression controls topographical circuit connectivity required for sequence

Jordan D Donohue1,2, Crisylle Blanton1,2, Anna Chen1

  • 1Department of Molecular, Cell, and Systems Biology; University of California - Riverside, Riverside, CA, 92521, USA.

Translational Psychiatry
|August 8, 2025
PubMed
Summary
This summary is machine-generated.

Adgrl2 in medial entorhinal cortex layer III neurons is crucial for forming brain circuits essential for episodic learning and memory. Its deletion disrupts neural connections and impairs spatial-temporal sequence learning.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genetics

Background:

  • The entorhinal cortex and hippocampus are vital for episodic memory.
  • Proper synaptic connection assembly during development is critical for these brain regions.
  • Adhesion G protein-coupled receptors, including latrophilins (Lphn1-3), are key molecular components for circuit building.

Purpose of the Study:

  • To investigate the cell-type specific role of Adgrl2 in the entorhinal cortex and hippocampus.
  • To understand how Adgrl2 influences the topographical and cell-type specific expression patterns mirroring connectivity.

Main Methods:

  • Creation of a transgenic mouse model (Adgrl2fl/fl;pOxr1-Cre) for targeted Adgrl2 deletion in medial entorhinal cortex layer III (MECIII) neurons.
  • Analysis of neural circuitry alterations using the developed mouse model.
  • Assessment of entorhinal cortex-dependent behaviors to identify functional consequences.

Main Results:

  • Adgrl2 deletion in MECIII neurons caused topographical shifts in major input/output circuitry pathways.
  • Specific impacts included altered MECIII axon projections to contralateral MEC layer I and presubiculum axons to ipsilateral MEC layer III.
  • Mice with Adgrl2 deletion exhibited selective deficits in spatial-temporal sequence learning.

Conclusions:

  • Adgrl2 expression in MECIII neurons is essential for the precise assembly of topographical circuits in the medial entorhinal cortex.
  • These circuits are critical for supporting episodic learning and memory formation.