Annexin A1 reduces inflammatory reaction and tissue damage through inhibition of phospholipase A(2) activation in adult rats following spinal cord injury

作者：Liu, Nai Kui; Zhang, Yi Ping; Han, Shu; Pei, Jiong; Xu, Lisa Y; Lu, Pei Hua; Shields, Christopher B; Xu, Xiao Ming^*

来源：Journal of Neuropathology and Experimental Neurology, 2007, 66(10): 932-943.

DOI：10.1097/nen.0b013e3181567d59

• annexin A1
• inflammation
• neuroprotection
• phospholipase A(2)
• spinal cord injury

Annexin A1 (ANYA1) has been suggested to be a mediator of the anti-inflammatory actions of glucocorticoids and more recently an endogenous neuroprotective agent. In the present study, we investigated the anti-inflammatory and neuroprotective effects of ANXA1 in a model of contusive spinal cord injury (SCI). Here we report that injections of ANXA1 (Ac 2-26) into the acutely injured spinal cord at 2 concentrations (5 and 20 mu g) inhibited SCI-induced increases in phospholipase A(2) and myeloperoxidase activities. In addition, ANXA1 administration reduced the expression of interleukin-1 beta and activated caspase-3 at 24 hours, and glial fibrillary acidic protein at 4 weeks postinjury. Furthermore, ANXA1 administration significantly reversed phospholipase A(2)-induced spinal cord neuronal death in vitro and reduced tissue damage and increased white matter sparing in vivo, compared to the vehicle-treated controls. Fluorogold retrograde tracing showed that ANXA1 administration protected axons of long descending pathways at 6 weeks post-SCI. ANXA1 administration also significantly increased the number of animals that responded to transcranial magnetic motor-evoked potentials. However, no measurable behavioral improvement was found after these treatments. These results, particularly the improvements obtained in tissue sparing and electrophysiologic measures, suggest a neuroprotective effect of ANXA1.

• 出版日期2007-10
• 单位上海交通大学