The Complement System in the Central Nervous System: From Neurodevelopment to Neurodegeneration

Area of Science:

• Neuroscience
• Immunology

Background:

• The complement system is known for its roles in innate and adaptive immunity.
• Its functions in the central nervous system (CNS) extend beyond immunity, impacting neurodevelopment and neurodegeneration.
• Appropriate complement activation maintains normal brain function, while dysregulation can lead to synaptic dysfunction and inflammation.

Purpose of the Study:

• To review recent findings on the complement system's role in CNS health and pathology.
• To discuss the therapeutic potential of targeting complement in neurodegenerative conditions.

Main Methods:

• Literature review of recent studies on complement components in neurological diseases.
• Analysis of regulatory mechanisms and pathophysiology.
• Exploration of anti-complement therapeutic strategies.

Main Results:

• Complement plays a dual role in the CNS: protection against pathogens and maintenance of function.
• Overactivation or dysregulation of complement is implicated in synaptic dysfunction and neuroinflammation.
• Significant knowledge gaps exist regarding complement's role in various brain disorders.

Conclusions:

• The complement system is integral to CNS health and disease.
• Targeting complement factors presents a promising therapeutic avenue for neurodegenerative diseases.
• Further research is needed to fully elucidate complement's complex role in the CNS.