Chinese Journal of Tissue Engineering Research ›› 2014, Vol. 18 ›› Issue (7): 1039-1044.doi: 10.3969/j.issn.2095-4344.2014.07.010

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Extracelluar matrix stimulates neurite outgrowth of dorsal root ganglion neurons differently depending on whether extracted from degenerated or normal intervertebral disk

Zhang Hui1, Liu Lin2, Xue Wen2   

  1. 1Department of Orthopedics, Second People’s Hospital of Gansu Province, Lanzhou 730000, Gansu Province, China
    2Department of Orthopedics, People’s Hospital of Gansu Province, Lanzhou 730000, Gansu Province, China
  • Revised:2013-12-01 Online:2014-02-12 Published:2014-02-12
  • Contact: Liu Lin, Chief physician, Department of Orthopaedics, People’s Hospital of Gansu Province, Lanzhou 730000, Gansu Province, China
  • About author:Zhang Hui, Master, Attending physician, Department of Orthopaedics, Second People’s Hospital of Gansu Province, Lanzhou 730000, Gansu Province, China
  • Supported by:

    the Natural Science Foundation of Gansu Province, No. 2010GS04988

Abstract:

BACKGROUND: Compared with the normal intervertebral disk, the density of nerve fibers and number of nerve endings and neuropeptides appear to be more in the degenerated intervertebral disk. However, this phenomenon does not occur in the normally aged disk.
OBJECTIVE: To evaluate the axonal growth and induction of a painful neuropeptide and substance P using rat dorsal root ganglion neurons and degenerated human disc cells in vitro.
METHODS: The human intervertebral discs were harvested from patients with discogenic low back pain and normal people. And extracelluar matrix extracted from human degenerative intervertebral discs was cultured with rat dorsal root ganglion neurons. The promotion of axonal growth and induction of substance P of dorsal root ganglion neurons in extracted medium were evaluated through morphology observation and enzyme-linked immunosorbent assay, respectively.
RESULTS AND CONCLUSION: Compared with the normal group, the content of nerve growth factor in the degenerative group was significantly higher and the average length of neuritis was significantly longer in the experimental group (P < 0.05). After intervention with anti-nerve growth factor β, the average length of neuritis became remarkably shorter. The percentage of substance P-immunoreactive cells was significantly higher in the degenerative group compared with the normal group (P < 0.001). Nerve growth factors that highly express in the  extracellular matrix from the degenerative intervertebral dick can promote neurite outgrowth of dorsal root ganglion neurons and induce release of neuropeptides related to pain transmission.



中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

Key words: intervertebral disk, intervertebral disk degeneration, nerve growth factor, substance P

CLC Number: