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Dendritic spine dysgenesis in Rett syndrome.

Xin Xu1, Eric C Miller1, Lucas Pozzo-Miller1

  • 1Department of Neurobiology, Civitan International Research Center, The University of Alabama at Birmingham, Birmingham, AL USA.

Frontiers in Neuroanatomy
|October 14, 2014
PubMed
Summary

Dendritic spine alterations in Rett syndrome (RTT) are linked to intellectual disability. Targeting brain-derived neurotrophic factor (BDNF) pathways may offer therapeutic strategies for RTT and similar neurodevelopmental disorders.

Keywords:
BDNFMeCP2TrkBautism spectrum disorderexcitatory synapsehippocampusorganotypic slice culturesspine density

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Genetics

Background:

  • Dendritic spines are crucial for excitatory synapses in the brain.
  • Abnormalities in spine structure are implicated in neurological disorders like Rett syndrome (RTT).
  • RTT is a neurodevelopmental disorder caused by mutations in the methyl CpG-binding protein 2 (MECP2) gene.

Purpose of the Study:

  • To review evidence of dendritic spine alterations in RTT.
  • To explore the role of MECP2 in regulating dendritic spine morphology.
  • To discuss potential therapeutic targets for RTT.

Main Methods:

  • Review of existing scientific literature.
  • Analysis of studies on RTT individuals and Mecp2-mutant models.
  • Examination of the relationship between MECP2, BDNF, and dendritic spine plasticity.

Main Results:

  • Principal neurons in RTT exhibit altered dendritic spine number and morphology.
  • MECP2 plays a key role in regulating dendritic spine development.
  • Signaling pathways downstream of BDNF are affected in RTT.

Conclusions:

  • MECP2 dysfunction leads to significant dendritic spine abnormalities in RTT.
  • BDNF signaling pathways present a promising therapeutic avenue for RTT.
  • Modulating spine plasticity could be a strategy for treating MECP2-associated disorders.