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Immunotherapy Strategies for Spinal Cord Injury

医学 脊髓损伤 髓鞘 多发性硬化 免疫疗法 中枢神经系统 炎症 免疫学 神经科学 少突胶质细胞 脊髓 免疫系统 生物 内科学 精神科
作者
Yong-Tang Wang,Xiu-Min Lu,Kai-Ting Chen,Ya-Hai Shu,Chun-Hong Qiu
出处
期刊:Current Pharmaceutical Biotechnology [Bentham Science]
卷期号:16 (6): 492-505 被引量:21
标识
DOI:10.2174/138920101606150407112646
摘要

Regeneration in the central nervous system (CNS) of adult mammalian after traumatic injury is limited, which often causes permanent functional motor and sensory loss. After spinal cord injury (SCI), the lack of regeneration is mainly attributed to the presence of a hostile microenvironment, glial scarring, and cavitation. Besides, inflammation has also been proved to play a crucial role in secondary degeneration following SCI. The more prominent treatment strategies in experimental models focus mainly on drugs and cell therapies, however, only a few strategies applied in clinical studies and therapies still have only limited effects on the repair of SCI. Recently, the interests in immunotherapy strategies for CNS are increasing in number and breadth. Immunotherapy strategies have made good progresses in treating many CNS degenerative disorders, such as Alzheimer's disease (AD), Parkinson's disease (PD), stroke, and multiple sclerosis (MS). However, the strategies begin to be considered to the treatment of SCI and other neurological disorders in recent years. Besides anti-inflamatory therapy, immunization with protein vaccines and DNA vaccines has emerged as a novel therapy strategy because of the simplicity of preparation and application. An inflammatory response followed by spinal cord injury, and is controled by specific signaling molecules, such as some cytokines playing a crucial role. As a result, appropriate immunoregulation, the expression of pro-inflammatory cytokines and anti-inflammatory cytokines may be an effective therapy strategy for earlier injury of spinal cord. In addition, myelinassociated inhibitors (MAIs) in the injured spinal cord, such as Nogo, myelin-associated glycoprotein (MAG) and oligodendrocyte- myelin glycoprotein (OMgp) are known to prevent axonal regeneration through their co-receptors, and to trigger demyelinating autoimmunity through T cell-mediated harmful autoimmune response. The antagonism of the MAIs through vaccinating with protein or DNA vaccines targeting Nogo, MAG, OMgp, and their co-receptors, may be an effective strategy for the treatment of SCI. However, immunotherapy such as anti-inflammtory therapy or vaccine targeting MAIs or their receptors, accompanied with the potential in risking autoimmune diseases. As a result, in order to optimize the anti-inflammtory therapy and design of protein or DNA vaccines for their use in the future clinical application, we need to further understand the possible mechanisms of neuroprotective immunity. This review presents recent advances in the development of immunotherapy strategies for the treatment of axonal degeneration and demyelination, and improvement of motor function after SCI.
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