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Atypical social behaviors in mouse models for Rett syndrome.

Cesar Acevedo-Triana^1,2, Destynie Medeiros^2,3, Julia Lopes Gonçalez^2,4

¹School of Psychology, Universidad Pedagógica y Tecnológica de Colombia, Tunja, Colombia.

Frontiers in Neurology

|May 1, 2026

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Rett syndrome impairs social behavior by affecting how the brain integrates social information, not by reducing social interest. Understanding MeCP2

Area of Science:

Neuroscience
Developmental Biology
Genetics

Background:

Social behavior relies on complex neural circuits involving memory, identity, and reward.
Rett syndrome and MeCP2 deficiency models show preserved basic sociability but deficits in social memory and flexible responding.
These deficits are linked to molecular and network dysfunctions in brain regions like the prefrontal cortex and hippocampus.

Purpose of the Study:

To investigate the neural basis of social deficits in Rett syndrome.
To understand the role of MeCP2 in regulating social behavior and neural circuit function.
To explore potential therapeutic strategies for Rett-related neurodevelopmental disorders.

Main Methods:

Analysis of social behavior in MeCP2-deficient rodent models.

Keywords:

BDNF MeCP2 Rett mouse models social behavior

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Investigation of molecular dysfunctions, including gene transcription and signaling pathways (e.g., BDNF-TrkB).

Examination of neural network activity in key brain regions.

Main Results:

Rett syndrome models exhibit impaired social memory, dominance, and aggression control, alongside anxiety.
Molecular deficits include altered activity-dependent transcription and reduced BDNF-TrkB signaling.
Neural circuit abnormalities are observed in prefrontal and hippocampal regions.

Conclusions:

Social deficits in Rett syndrome stem from impaired integration and valuation of social information.
MeCP2 plays a critical role in the development and function of social neural circuits.
Targeting MeCP2 pathways may offer strategies to restore adaptive social behavior.