Targeting mitochondrial responses to intra-articular fracture to prevent posttraumatic osteoarthritis.

Targeting mitochondrial responses to intra-articular fracture to prevent posttraumatic osteoarthritis.
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DOI:
10.1126/scitranslmed.aan5372
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发表时间:
2018-02-07
影响因子:
17.1
通讯作者:
Martin JA
Martin JA
中科院分区:
医学1区
文献类型:
--
作者:
Coleman MC;Goetz JE;Brouillette MJ;Seol D;Willey MC;Petersen EB;Anderson HD;Hendrickson NR;Compton J;Khorsand B;Morris AS;Salem AK;Fredericks DC;McKinley TO;Martin JA

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我们测试了在严重创伤性损伤后抑制机械反应性关节软骨细胞线粒体和预防氧化损伤是否代表创伤后骨关节炎(PTOA)预防的可行范例。我们使用了猪飞节关节内骨折(IAF)模型,该模型非常适合于类似人类的手术技术,并且与人类踝关节具有极好的解剖相似性。IAF后,注射异戊巴比妥或N-乙酰半胱氨酸(NAC),以抑制软骨细胞的电子传递或下游的氧化应激,分别。通过分光光度酶测定法或谷胱甘肽/谷胱甘肽二硫化物测定法和氧化应激的免疫组织化学测定法证实了这些作用。IAF后给予异戊巴比妥或NAC在6个月时提供了对PTOA的实质性保护,包括蛋白多糖含量的维持、组织学疾病评分的降低和软骨细胞代谢功能的正常化。这些数据支持损伤后靶向软骨细胞代谢的治疗潜力,并表明线粒体在介导PTOA中的重要作用。
We tested whether inhibiting mechanically-responsive articular chondrocyte mitochondria after severe traumatic injury and preventing oxidative damage represent a viable paradigm for posttraumatic osteoarthritis (PTOA) prevention. We used a porcine hock intra-articular fracture (IAF) model well suited to human-like surgical techniques and with excellent anatomic similarities to human ankles. After IAF, amobarbital or N-acetylcysteine (NAC) was injected to inhibit chondrocyte electron transport or downstream oxidative stress, respectively. Effects were confirmed via spectrophotometric enzyme assays or glutathione/glutathione disulfide assays and immunohistochemical measures of oxidative stress. Amobarbital or NAC delivered after IAF provided substantial protection against PTOA at 6 months, including maintenance of proteoglycan content, decreased histological disease scores, and normalized chondrocyte metabolic function. These data support the therapeutic potential of targeting chondrocyte metabolism after injury and suggest a strong role for mitochondria in mediating PTOA.
DOI: 10.1006/bmmb.1994.1004
发表时间: 1994-02-01
期刊: BIOCHEMICAL MEDICINE AND METABOLIC BIOLOGY
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