中国神经再生研究(英文版) ›› 2017, Vol. 12 ›› Issue (6): 969-976.doi: 10.4103/1673-5374.208592

• 原著:脊髓损伤修复保护与再生 • 上一篇    下一篇

突触相关蛋白25kDa可能是改善脊髓损伤后感觉和运动功能障碍的干预靶点

  

  • 收稿日期:2017-05-05 出版日期:2017-06-15 发布日期:2017-06-15
  • 基金资助:

     

    全国大学生创新实验项目201313705005

Synaptosomal-associated protein 25 may be an intervention target for improving sensory and locomotor functions after spinal cord contusion

Zhan-qiong Zhong1, 2, Yang Xiang1, Xi Hu1, You-cui Wang3, Xi Zeng1, Xiao-meng Wang1, Qing-jie Xia3, Ting-hua Wang3, Xiao Zhang1   

  1. 1 Experiment Technology Center of Preclinical Medicine of Chengdu Medical College, Chengdu, Sichuan Province, China; 2 School of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan Province, China; 3 Institute of Neurological Diseases, Center for Translational Neuroscience, Western China Hospital, Sichuan University, Chengdu, Sichuan Province, China
  • Received:2017-05-05 Online:2017-06-15 Published:2017-06-15
  • Contact: Xiao Zhang, Ph.D., zhangxiao1985007@126.com.
  • Supported by:

    This work was supported by the National Undergraduate Innovation Training Project of China, No. 201313705005.

摘要:

研究显示,存在于突触中的突触相关蛋白25kDa(SNAP-25)能够参与胞外分泌和神经递质的释放。SNAP-25与阿尔茨海默病和注意缺陷多动障碍有关,但其与脊髓损伤的关系尚不可知,因此,我们试图对此进行分析。以重物坠落法建立脊髓挫伤大鼠模型,应用基因芯片检测发现262个基因表达水平出现明显变化,其中表达下调的基因占绝大多数。实时定量PCR证实基因芯片的结果发现,其中SNAP-25为变化最显著的基因之一。进一步在损伤后1,3,7,14和28 d,实时定量PCR和Western blot检测也发现脊髓挫伤大鼠脊髓背角神经元和胶质细胞轴突中存在SNAP-25,且表达水平低于正常大鼠。实验结果说明脊髓挫伤大鼠SNAP-25表达的降低的确与感觉和运动功能有关。

ORCID:0000-0001-6597-8825(Xiao Zhang)

关键词: 神经再生, 突触相关蛋白25kDa, 感觉功能, 运动功能, 脊髓损伤, 基因芯片, 神经元

Abstract:

Synaptosomal-associated protein 25 kDa (SNAP-25) is localized on the synapse and participates in exocytosis and neurotransmitter release. Decreased expression of SNAP-25 is associated with Alzheimer’s disease and attention deficit/hyperactivity disorder. However, the expression of SNAP-25 in spinal cord contusion injury is still unclear. We hypothesized that SNAP-25 is associated with sensory and locomotor functions after spinal cord injury. We established rat models of spinal cord contusion injury to detect gene changes with a gene array. A decreased level of SNAP-25 was detected by quantitative real time-polymerase chain reaction and western blot assay at 1, 3, 7, 14 and 28 days post injury. SNAP-25 was localized in the cytoplasm of neurons of the anterior and posterior horns, which are involved in locomotor and sensory functions. Our data suggest that reduced levels of SNAP-25 are associated with sensory and locomotor functions in rats with spinal cord contusion injury.

Key words: nerve regeneration, synaptosomal-associated protein 25 kDa, sensory function, locomotor function, spinal cord injury, gene array, neurons, neural regeneration