Ann Rheum Dis:骨关节炎骨髓病变微点阵分析证实软骨更新、神经发生和炎症相关基因上调

2017-07-14 xiangting MedSci原创

这项研究是首先采用详细的组织学分析和微阵列技术来研究膝关节OA BMLs。

骨髓病变(BML)在骨关节炎(OA)中可以使用MRI进行很好地描述,并与疼痛相关,但对其病理特征和基因表达知之甚少。研究人员使用新的组织分析工具评估BMLs,以更深入地了解其细胞和分子表达。

共招募了98名参与者,72名为重度OA需要全膝关节置换(TKR),12名轻度OA和14名非OA对照。评估参与者的疼痛(使用Western Ontario and McMaster大学骨关节炎指数(WOMAC))和膝关节MRI(使用MOAKS)。然后使用组织学和组织微点阵对TKR收集的组织进行BML分析。

与对照组0.5(1.28)(p <0.0001)相比,重度OA 59.4(21.3)和轻度OA 30.9(20.3)的平均(SD)WOMAC疼痛评分显著增加。MOAKS显示所有分析的TKR组织都有BMLs,在这些病变中,骨髓体积明显减少,被致密纤维结缔组织、新血管、透明软骨和纤维软骨所替代。微阵列比较OA BML和正常骨骼发现218个基因的表达有显著性差异(p <0.05)。上调最多的基因包括已知的构成神经元,成骨和软骨通路的stathmin 2、血小板反应蛋白4,基质金属蛋白酶13和Wnt / Notch / catenin /趋化因子信号传导分子。

这项研究是首先采用详细的组织学分析和微阵列技术来研究膝关节OA BMLs。BMLs为疼痛敏感化,神经元,胞外基质和促炎信号基因的高代谢活性区域,这可能解释其与疼痛的强关联。

原始出处:

Anasuya Kuttapitiya,et al. Microarray analysis of bone marrow lesions in osteoarthritis demonstrates upregulation of genes implicated in osteochondral turnover, neurogenesis and inflammation. Ann Rheum Dis. 12 July 2017.

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    2017-08-31 lisa438
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    2017-07-16 lmm397
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在晚期NSAID治疗无效的OA中,运动可以通过增加内源性阿片样物质信号传导来缓解疼痛。

Arthritis Rheumatol:滑膜Wnt信号诱导MMPs表达,并与早期症状性骨关节炎的疾病进展相关

通过增加MMPs的产生,滑膜中的Wnt信号可能有效诱导骨关节炎的进展。