Complement and the central nervous system: emerging roles in development, protection and regeneration

Area of Science:

• Neuroscience
• Immunology
• Cell Biology

Background:

• The complement cascade is traditionally viewed as an innate immune effector system.
• Emerging research indicates novel roles for complement proteins beyond immunity, particularly in tissue repair and regeneration.

Purpose of the Study:

• To explore the multifaceted roles of complement proteins in the central nervous system (CNS).
• To understand how complement influences neurogenesis, synaptogenesis, cell survival, and tissue regeneration within the CNS.

Main Methods:

• Review of current literature on complement protein functions in the CNS.
• Analysis of complement's interactions with neuronal and glial cells throughout their cell cycle.

Main Results:

• Complement proteins directly and indirectly influence neuronal and glial cell behavior and fate.
• Complement mediates neurogenesis, synaptogenesis, cell migration, and neuroprotection.
• Complement proteins promote cell survival via anti-apoptotic mechanisms and aid in clearing and regenerating injured CNS tissues.

Conclusions:

• Complement proteins possess diverse functions within the CNS, extending beyond their immune roles.
• Understanding complement's role in CNS health and disease presents a significant and exciting research frontier.