| The cell biology of intervertebral disc aging and degeneration. | |
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MedLine Citation:
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PMID: 17870673 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Intervertebral disc degeneration, which mimics disc aging but occurs at an accelerated rate, is considered to be related to neck or low back pain and disc herniation. Degenerated discs show breakdown of the extracellular matrix and thus fail to bear the daily loadings exerted on the spine. Rather than a passive process of wear and tear, disc degeneration is an aberrant, cell-mediated response to progressive structural failure due to aging and other environmental factors such as abnormal mechanical stress. With aging and degeneration, disc cells undergo substantially biologic changes, including alternation of cell type in the nucleus pulposus, increased cell density but decreased number of viable cells as a result of increased cell death and increased cell proliferation, increased cell senescence, and altered cell phenotype which is characterized by compromised capability of synthesizing correct matrix components and by enhanced catabolic metabolism. These changes are involved in the process of disc degeneration through the complicated interactions among them. To retard or reverse disc degeneration, the abnormal conditions of the decreased viable cell population and the altered cell phenotype should be corrected. As potential therapies for disc degeneration, intradiscal protein injection, gene transfer and cell implantation are being understudied in vivo. Suppression of excessive apoptosis and accelerated senescence of disc cells may be other choices for treating disc degeneration. When performing a biologic therapy in order to repair or regenerate the degenerated disc, nutrient and biomechanical factors should also be incorporated, because they are the major causes of the biologic changes experienced by disc cells. Moreover, a very early intervention is indicated by the finding that the onset of human disc degeneration occurs as early as by adolescence. |
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Authors:
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Chang-Qing Zhao; Li-Min Wang; Lei-Sheng Jiang; Li-Yang Dai |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Review Date: 2007-08-10 |
Journal Detail:
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Title: Ageing research reviews Volume: 6 ISSN: 1568-1637 ISO Abbreviation: Ageing Res. Rev. Publication Date: 2007 Oct |
Date Detail:
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Created Date: 2007-09-24 Completed Date: 2007-12-12 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101128963 Medline TA: Ageing Res Rev Country: England |
Other Details:
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Languages: eng Pagination: 247-61 Citation Subset: IM |
Affiliation:
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Department of Orthopaedic Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, 200092 Shanghai, China. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aging
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metabolism*,
pathology Animals Cell Aging / physiology Cell Death / physiology Chondrocytes / metabolism, pathology Fibrocartilage / metabolism, physiopathology Humans Intervertebral Disk / metabolism, pathology, physiopathology* Intervertebral Disk Displacement / pathology, physiopathology*, therapy Stress, Mechanical |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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