Complement System in Alzheimer's Disease

Akash Shah, Uday Kishore, Abhishek Shastri
2021 International Journal of Molecular Sciences  
Alzheimer's disease is a type of dementia characterized by problems with short-term memory, cognition, and difficulties with activities of daily living. It is a progressive, neurodegenerative disorder. The complement system is an ancient part of the innate immune system and comprises of more than thirty serum and membrane-bound proteins. This system has three different activating pathways and culminates into the formation of a membrane attack complex that ultimately causes target cell lysis
more » ... ally pathogens) The complement system is involved in several important functions in the central nervous system (CNS) that include neurogenesis, synaptic pruning, apoptosis, and neuronal plasticity. Here, we discuss how the complement system is involved in the effective functioning of CNS, while also contributing to chronic neuroinflammation leading to neurodegenerative disorders such as Alzheimer's disease. We also discuss potential targets in the complement system for stopping its harmful effects via neuroinflammation and provide perspective for the direction of future research in this field.
doi:10.3390/ijms222413647 pmid:34948444 pmcid:PMC8705098 fatcat:eh2hz7kq65bgdeo7vlk43jdkfa