J Periodontal Res:U937细胞释放的亲环素A上调牙龈成纤维细胞中MMP-2的表达

2020-05-17 lishiting MedSci原创

这篇体外研究的目的是为了评估与人牙龈成纤维细胞(HGFs)共培养后单核细胞U937中亲环素A (CyPA)的表达变化,并评估共培养环境下CyPA对MMP-2表达上调的影响。

这篇体外研究的目的是为了评估与人牙龈成纤维细胞(HGFs)共培养后单核细胞U937中亲环素A (CyPA)的表达变化,并评估共培养环境下CyPA对MMP-2表达上调的影响。

研究通过免疫酶联吸附测定检测单独培养或transwell共培养HGF和U937细胞时CyPA从介质中释放的情况。在条件培养基或transwell共培养条件下,通过实时定量聚合酶链式反应检测细胞内CyPA和MMP-2的mRNA表达。并通过酶谱法检测分析介质中释放的pro-MMP-2/MMP-2活性。

结果显示,与独立培养条件相比,transwell共培养环境下CyPA蛋白表达水平显著上调。transwell共培养显著增加U937细胞中CyPA的mRNA表达,而不是HGFs。在添加HGF条件培养基后,U937细胞中mRNA表达以剂量依赖的模式上调。尽管transwell共培养后MMP-2的活性明显增强,但其mRNA表达仅在HGFs中上调。外源性的CyPA能够以剂量依赖的模式增加HGFs中MMP-2的活性。然而,CyPA拮抗剂会抑制transwell共培养条件下的MMP-2活性。并且,c-Jun amino-terminal kinase (JNK)通路抑制剂显著减少HGF中CyPA上调的MMP-2活性。

结论:基于本项研究的发现,牙龈成纤维细胞通过JNK通路增强U937细胞中释放的CyPA,进而促进成纤维细胞中MMP-2上调。结果阐明了在2种细胞中涉及到细胞间MMP-2和CyPA相互作用的一种全新机制。

原始出处

Kuo PJ, Lin CY, et al. Fibroblast-enhanced cyclophilin A releasing from U937 cell upregulates MMP-2 in gingival fibroblast. J Periodontal Res. 2020 May 14. doi: 10.1111/jre.12759.

 

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    2020-09-19 feather89
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    2020-05-17 qingfengqishi5

    学习了,学习了

    0

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