2007 Fiscal Year Final Research Report Summary
Pathogenesis of disxgenic low back pain in association with micro-environmental change of intervertebral disc
| Project/Area Number |
18613005
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Pain science
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| Research Institution | Mie University |
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Principal Investigator |
KASAI Yuichi Mie University, Graduate School of Medicine, Dept of Orthopaedic Surg, Assistant professor (20242943)
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| Co-Investigator(Kenkyū-buntansha) |
AKEDA Koji Mie University, Graduate School of Medicine, Dept of Orthopaedic Surg, Assistant professor (20422826)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Intervertebral disc / Low back pain / Proteoglycan / Extracellular matrix / Nociceptor fiber |
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| Research Abstract |
INTRODUCTION: The NG2 proteoglycan (NG2), a trans-membrane proteoglycan with a large extracellular domain, has been shown to bind type VI collagen, which is a main constituent of the pericellular matrix in articular cartilage. NG2 has been reported to play an important role as an interactive extracellular matrix component and membrane receptor for growth factors. Importantly, NG2 proteoglycan has also attracted much attention among researchers who investigate the nervous system; because NG2 has been shown to strongly regulate nerve growth. Therefore, we hypothesized that the expression of NG2 contributes to the pathogenesis of intervertebral disc (IVD) degeneration, and play an important role in the regulatory mechanism of a 'discogenic low back pain'.
RESULTS: [2006] NG2 immunoreactivity co-localized with type VI collagen was found at the periphery of the cell in a ring-like pattern by human IVD cells. The expression of NG2 was identified both by Western blot and RT-PCR analyses. The content of NG2 in human intervertebral disc tissues was elevated in tissues with an advanced stage of degeneration compared to tissues with an early stage of degeneration. [2007] NG2, co-localized with nociceptor fiber (C-fiber), was clearly identified in the rat sciatic nerve. In the target organ such as foot pad and intervertebral disc tissue, the co-localization of NG2 and C-fiber was also found. Furthermore, the expression of NG2 was found to be up-regulated after peripheral nerve injury.
DISCUSSION: The nociceptor fiber, which is involved in the pathogenesis of 'discogenic low back pain', co-localized with NG2 proteoglycan. Interestingly, NG2 is also expressed by intervertebral disc cells, and its expression was up-regulated with the advance of IVD degeneration. Our results suggest the possibility that the change of NW expression within the IVD may have relevance to the regulatory mechanism of "discogenic low back pain
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[Journal Article] The expression of NG2 proteoglycan in the human intervertebral disc2007
Author(s)
Akeda, K, An, HS, Pichika, R, Patel, K, Muehlemen, C, Nakagawa, K, Uchida, A, Masuda, K
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Journal Title
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Spinal reconstruction ; Influence of injury or fusion of a single motion segment on other motio-n segments in the spine2007
Author(s)
Kasai, Y, Uchida, A, Kato, T, Inaba, T, Tokuda, M
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Journal Title
Spinal Reconstruction Lewandrowski K-U ed, Informa New York
Pages: 109-117
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Prevalence of osteoarthritis, osteoporotic vertebral fractures, and spond-ylolisthesis among the elderly in a Japanese village2006
Author(s)
Horikawa, K, Kasai, Y, Yamakawa, T, Sudo, A, Uchida, A
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Journal Title
Journal of Orthopaedic Surgery 14
Pages: 9-12
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Developmental of 6-axis material tester for measuring mechanical spine properties2006
Author(s)
Fujiwara, M, Masuda, T, Inaba, T, Katoh, T, Kasai, Y, Ito, S
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Journal Title
Journal of Robotics and Mechatronics 18
Pages: 160-166
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Low back pain developed from cervical spondylotic myelopathy2007
Author(s)
Kawakita, E, Kasai, Y, Akeda, K, Matsumura, Y, Uchida, A
Organizer
22nd North American Spine Society
Place of Presentation
Austin, Texas USA
Year and Date
20071023-27
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 頚髄症患者における腰痛2007
Author(s)
川喜田英司、笠井裕一、内田淳正
Organizer
第36回日本脊椎脊髄病学会
Place of Presentation
金沢
Year and Date
20070426-27
Description
「研究成果報告書概要(和文)」より
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