Glypicans and Heparan Sulfate in Synaptic Development, Neural Plasticity, and Neurological Disorders

Area of Science:

• Neuroscience
• Molecular Biology
• Genetics

Background:

• Heparan sulfate proteoglycans (HSPGs) are vital cell surface and extracellular matrix components.
• Glypicans, a subset of HSPGs, are increasingly recognized for their roles in synaptic development and function.
• Mutations in HSPG-related genes are associated with various diseases, including neurodevelopmental disorders.

Purpose of the Study:

• To review the critical roles of glypicans and heparan sulfate (HS) in synapse formation and neural plasticity.
• To explore the involvement of glypicans and HS in neurological disorders, using model organisms.
• To highlight glypicans as potential therapeutic targets for neurodevelopmental conditions.

Main Methods:

• Literature review of vertebrate and invertebrate studies.
• Analysis of genetic studies linking glypicans and HS to neurological disorders.
• Focus on mouse and Drosophila models for understanding human disease.

Main Results:

• Glypicans regulate synapse formation by interacting with key neuronal proteins like LRRTMs, LAR RPTPs, and GPR158.
• HS chains of glypicans mediate crucial interactions, influencing synaptic protein complexes.
• Glypican dysfunction leads to synaptic malformation, impaired neural networks, and abnormal behaviors.

Conclusions:

• Glypicans are central regulators of synapse development, plasticity, and function.
• Dysregulation of glypicans and HS contributes to neurodevelopmental disorders such as autism spectrum disorder.
• Model organisms like mice and Drosophila offer valuable insights into glypican roles in human neurological diseases.