Neural Regeneration Research ›› 2017, Vol. 12 ›› Issue (9): 1519-1528.doi: 10.4103/1673-5374.215264

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Jisuikang, a Chinese herbal formula, increases neurotrophic factor expression and promotes the recovery of neurological function after spinal cord injury

 Yang Guo1, Yong Ma1, 2, Ya-lan Pan1, Su-yang Zheng1, Jian-wei Wang3, Gui-cheng Huang1   

  1. Nanjing University of Chinese Medicine, Nanjing, Jiangsu Province, China
    2 Department of Traumatology & Orthopedics, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu Province, China
    3 Department of Traumatology & Orthopedics, Wuxi Hospital of Traditional Chinese Medicine Affiliated to Nanjing University of Chinese Medicine, Wuxi, Jiangsu Province, China
  • Received:2017-08-22 Online:2017-09-15 Published:2017-09-15
  • Contact: Gui-cheng Huang, M.D.,hgc@njucm.edu.cn.
  • Supported by:

    This work was partially supported by the National Natural Science Foundation of China, No. 81573997; the Natural Science Foundation for Colleges and Universities in Jiangsu Province of China, No. 15KJD360001; the Natural Science Foundation of Jiangsu Province of  China, No. BK2011180.

Abstract:

The Chinese medicine compound, Jisuikang, can promote recovery of neurological function by inhibiting lipid peroxidation, scavenging oxygen free radicals, and effectively improving the local microenvironment after spinal cord injury. However, the mechanism remains unclear. Thus, we established a rat model of acute spinal cord injury using a modified version of Allen’s method. Jisuikang (50, 25, and 12.5 g/kg/d) and prednisolone were administered 30 minutes after anesthesia. Basso, Beattie, and Bresnahan locomotor scale scores and the oblique board test showed improved motor function recovery in the prednisone group and moderate-dose Jisuikang group compared with the other groups at 3–7 days post-injury. The rats in the moderate-dose Jisuikang group recovered best at 14 days post-injury. Hematoxylin-eosin staining and transmission electron microscopy showed that the survival rate of neurons in treatment groups increased after 3–7 days of administration. Further, the structure of neurons and glial cells was more distinct, especially in prednisolone and moderate-dose Jisuikang groups. Western blot assay and immunohistochemistry showed that expression of brain-derived neurotrophic factor (BDNF) in injured segments was maintained at a high level after 7–14 days of treatment. In contrast, expression of nerve growth factor (NGF) was down-regulated at 7 days after spinal cord injury. Real-time fluorescence quantitative polymerase chain reaction showed that expression of BDNF and NGF mRNA was induced in injured segments by prednisolone and Jisuikang. At 3–7 days after injury, the effect of prednisolone was greater, while 14 days after injury, the effect of moderate-dose Jisuikang was greater. These results confirm that Jisuikang can upregulate BDNF and NGF expression for a prolonged period after spinal cord injury and promote repair of acute spinal cord injury, with its effect being similar to prednisolone.
 

Key words: nerve regeneration, spinal cord injury, Jisuikang, Chinese medicine, prednisolone, microenvironment, axon regeneration, secondary changes, neuronal apoptosis, brain-derived neurotrophic factor, nerve growth factor, neural regeneration