Synaptic plasticity and signaling in Rett syndrome

Area of Science:

• Neuroscience
• Genetics
• Developmental Biology

Background:

• Rett syndrome (RTT) is a neurodevelopmental disorder primarily caused by mutations in the methyl-CpG-binding protein-2 (MeCP2) gene.
• Affected children exhibit normal early development followed by regression, characterized by decelerated head growth, stereotyped hand movements, breathing irregularities, and seizures.

Purpose of the Study:

• To review novel findings on how specific synaptic mechanisms and signaling pathways are affected in Rett syndrome models.
• To elucidate the pathogenetic mechanisms of RTT converging at the synaptic level.

Main Methods:

• Analysis of animal models of Rett syndrome with construct and face validity.
• Review of recent research on synaptic transmission and plasticity in RTT models.

Main Results:

• Homeostatic regulation of the MeCP2 gene is crucial for normal central nervous system (CNS) functioning.
• Multiple complex pathways involving neuronal and glial cells are disrupted in RTT models.
• RTT pathogenesis converges at the synaptic level, impairing synaptic transmission and plasticity.

Conclusions:

• Synaptic dysfunction is a central mechanism in Rett syndrome.
• Understanding affected synaptic pathways offers potential therapeutic targets for RTT.