Spinal cord injury has the characteristics of high mortality and disability rates,and the treatment of spinal cord injury has been a worldwide problem.With the deepening of spinal cord injury research and the advancement of treatment methods,the survival rate of patients has improved,but the clinical efficacy is still not ideal.New research has found that the immune response is involved in the entire process of pathological changes and regeneration and repair after spinal cord injury.Among them,the complement system plays an important role in the occurrence and development of spinal cord injury.This article mainly reviews the role of the complement system in secondary spinal cord injury and regeneration and repair after spinal cord injury,including the double-edged sword effect of the complement system,the impact of the complement system on axonal regeneration and synaptic maintenance,and possible signaling pathways,with a view to improving the treatment of spinal cord injury,providing new treatment ideas.
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