Comparing intra-articular CTXII levels assessed via magnetic capture or lavage in a rat knee osteoarthritis model.

Comparing intra-articular CTXII levels assessed via magnetic capture or lavage in a rat knee osteoarthritis model.
复制标题

比较大鼠膝骨关节炎模型中通过磁捕获或灌洗评估的关节内 CTXII 水平。

DOI:
10.1016/j.joca.2017.01.009
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发表时间:
2017
影响因子:
7
通讯作者:
Allen,KD
Allen,KD
中科院分区:
医学2区
文献类型:
--
作者:
Yarmola,EG;Shah,YY;Kloefkorn,HE;Dobson,J;Allen,KD

文献摘要

被引文献

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目的跨物种骨关节炎 (OA) 的平行测量有助于评估相对于人类的 OA 模型。为了满足这一需求,我们的团队最近开发了一种基于磁性纳米颗粒的技术,称为磁捕获,用于分析大鼠膝盖内的生物标志物。本研究的目的是直接比较磁捕获与灌洗,并评估膝 OA 大鼠内侧半月板横断 (MMT) 模型中的 II 型胶原蛋白 (CTXII) 的 c-端肽。DesignMMT 手术在 30 只雄性 Lewis 大鼠(3 个月,250 g)中进行。使用灌洗或磁力捕获,在术后 1 周(每组 n= 6)或 4 周(每组 n= 8)评估受 OA 影响的膝关节和对侧膝关节中的 CTXII。 结果 虽然灌洗检测到 1 周时受 OA 影响的膝关节中 CTXII 浓度升高(P= 0.002),但磁力捕获检测到 4 周时受 OA 影响的膝关节中 CTXII 水平升高(P=0.016)。虽然磁性捕获在第 1 周没有检测到 CTXII 显着升高,但接受磁性捕获评估的 6 只大鼠中,有 5 只在受 OA 影响的关节中相对于对侧肢体具有更高的 CTXII 水平。此外,通过磁捕获,CTXII 水平从 1 周增加到 4 周,与组织学损伤相对应。通过灌洗评估的 CTXII 浓度随时间变化相对恒定。结论磁捕获和灌洗以不同的方式评估 CTXII:磁捕获测量关节中的总 CTXII,而灌洗测量浓度。我们的数据表明磁捕获在以后的时间点可能是有利的,此时 CTXII 可以被渗出物稀释。
ObjectiveParallel measures of osteoarthritis (OA) across species can help evaluate OA models relative to humans. Toward this need, our group recently developed a magnetic nanoparticle-based technology, termed magnetic capture, to analyze biomarkers within a rat knee. The objectives of this study were to directly compare magnetic capture to lavage, and assess c-telopeptide of collagen type II (CTXII) in the rat medial meniscus transection (MMT) model of knee OA.DesignMMT surgery was performed in 30 male Lewis rats (3 months, 250 g). Using lavage or magnetic capture, CTXII was assessed in the OA-affected and contralateral knee at 1 week (n= 6 per group) or 4 weeks (n= 8 per group) after surgery.ResultsWhile lavage detected elevated CTXII concentrations in the OA-affected knee at 1 week (P= 0.002), magnetic capture detected elevated CTXII levels in the OA-affected knee at 4 weeks (P= 0.016). While magnetic capture did not detect significant elevation of CTXII at week 1, five of six rats evaluated with magnetic capture had higher CTXII levels in the OA-affected joint relative to the contralateral limb. Moreover, with magnetic capture, CTXII levels increased from 1 week to 4 weeks, corresponding to histological damage. CTXII concentrations evaluated via lavage were relatively constant across time.ConclusionsMagnetic capture and lavage evaluate CTXII in different ways: Magnetic capture measures total CTXII in the joint, while lavage measures concentration. Our data indicate magnetic capture may be advantageous at later time points, where CTXII can be diluted by effusions.