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首页> 外文期刊>Journal of orthopaedic research >Mitochondrial bioenergetics, mass, and morphology are altered in cells of the degenerating human annulus
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Mitochondrial bioenergetics, mass, and morphology are altered in cells of the degenerating human annulus

机译:退化的人环的细胞中线粒体的生物能,质量和形态发生了改变

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摘要

Back pain and intervertebral disc degeneration have a growing socioeconomic healthcare impact. Information on mitochondrial function in human intervertebral disc cells, however, is surprisingly sparse. We assessed mitochondrial bioenergetics, mass, and ultrastructure in annulus cells cultured from human discs of varying degenerative stages. Citrate synthase activity (reflecting mitochondrial mass) declined significantly with increasing Thompson grade (p < 0.0001). Both mitochondrial (p = 0.009) and non-mitochondrial (p = 0.0029) respiration showed significant changes with increasing stages of disc degeneration. No significant relationships were found for the association of respiration data with herniated or non-herniated status, or with subject age. Examination of mitochondrial ultrastructure in cultured annulus cells revealed unusual features which included mitochondrial inclusion bodies, poorly defined cristae and dark staining. Findings reported here are novel and document biochemical, metabolic, and morphologic abnormalities in mitochondria in cells from more degenerated annulus cells. Data suggest that the disc degenerative, not age, is a major factor associated with mitochondrial impairment, and also implicate oxidative stress, driven by mitochondrial dysfunction, as a major component within the degenerating disc. Findings have relevance to advancements in cell-based therapies to treat disc degeneration.
机译:背痛和椎间盘退变对社会经济保健的影响越来越大。然而,有关人椎间盘细胞中线粒体功能的信息却很少。我们评估了从不同退化阶段的人类椎间盘培养出来的环状细胞中线粒体的生物能,质量和超微结构。柠檬酸盐合酶活性(反映线粒体质量)随汤普森等级的升高而显着下降(p <0.0001)。线粒体呼吸的阶段性增加,线粒体(p = 0.009)和非线粒体(p = 0.0029)呼吸均显示出显着变化。没有发现呼吸数据与突出或未突出状态或受试者年龄之间的显着关系。对培养的环细胞中线粒体超微结构的检查显示出异常特征,包括线粒体包涵体,轮廓分明的poor痕和深色染色。此处报道的发现是新颖的,有文献记载,来自更多变性环细胞的细胞中线粒体的生化,代谢和形态异常。数据表明,椎间盘的退变而不是年龄是与线粒体损伤相关的主要因素,并且还牵涉到由线粒体功能障碍驱动的氧化应激,这是椎间盘退变的主要组成部分。这些发现与治疗椎间盘退变的细胞疗法的进展有关。

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