Astrocytes prevent abnormal neuronal development in the fragile x mouse

Area of Science:

• Neuroscience
• Developmental Biology
• Cell Biology

Background:

• Astrocytes regulate neuronal growth and synaptic development.
• Astrocytes are implicated in developmental disorders.
• The role of astrocytes in fragile X syndrome (FXS) remains unknown.

Purpose of the Study:

• To investigate the role of astrocytes in the neurobiology of fragile X syndrome.
• To determine if astrocytes from FXS models affect neuronal morphology and synapse development.

Main Methods:

• Coculture of hippocampal neurons with astrocytes from wild-type and FXS mouse models.
• Assessment of dendritic morphology in neurons.
• Quantification of presynaptic and postsynaptic protein aggregates/clusters.

Main Results:

• Neurons grown on FXS astrocytes showed abnormal dendritic morphology and reduced synaptic protein clusters.
• Normal astrocytes prevented abnormal dendrite development and synaptic deficits in neurons from FXS mice.
• These findings establish a role for astrocytes in FXS neurobiology.

Conclusions:

• Astrocytes contribute to abnormal dendrite morphology in FXS.
• Astrocytes play a role in dysregulated synapse development in FXS.
• Targeting astrocytes may offer therapeutic potential for FXS.