Aggrecan: Beyond cartilage and into the brain.

Area of Science:

• Neuroscience
• Extracellular Matrix Biology
• Developmental Neuroscience

Background:

• Aggrecan is extensively studied in cartilage, but its central nervous system (CNS) functions are emerging.
• Aggrecan, a lectican family member, organizes the neural extracellular space by complexing with hyaluronan, link protein, and tenascins.
• Unlike other lecticans, aggrecan is uniquely localized to the perineuronal net in the CNS.

Purpose of the Study:

• To review the structure, expression, and function of aggrecan within the central nervous system.
• To highlight aggrecan's unique role in perineuronal net formation and its implications for neural plasticity and repair.

Main Methods:

• Literature review focusing on studies investigating aggrecan in the CNS.
• Analysis of aggrecan's molecular interactions and its presence in perineuronal nets.
• Synthesis of current research on aggrecan's role in neural development and injury recovery.

Main Results:

• Aggrecan is essential for organizing the neural extracellular matrix through complex formation.
• The perineuronal net, rich in aggrecan, plays a critical role in regulating neural plasticity.
• Aggrecan and perineuronal nets are implicated in the recovery processes following central nervous system injury.

Conclusions:

• Aggrecan's unique localization and function in the perineuronal net are vital for CNS organization.
• Understanding aggrecan's role is key to developing strategies for enhancing neural plasticity and promoting recovery from injury.