Increased long noncoding RNA LINK-A contributes to rheumatoid synovial inflammation and aggression.

Increased long noncoding RNA LINK-A contributes to rheumatoid synovial inflammation and aggression.
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长链非编码 RNA LINK-A 增加导致类风湿滑膜炎症和攻击行为

DOI:
10.1172/jci.insight.146757
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发表时间:
2021-12-08
期刊:
影响因子:
8
通讯作者:
Xu H
Xu H
中科院分区:
医学1区
文献类型:
--
作者:
Wang J;Shen C;Li R;Wang C;Xiao Y;Kuang Y;Lao M;Xu S;Shi M;Cai X;Liang L;Xu H

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成纤维细胞样滑膜细胞在控制类风湿关节炎(RA)滑膜炎症和关节破坏中起着关键作用。长非编码RNA(LncRNAs)对RA的作用在很大程度上是未知的。在这里,我们发现主要位于细胞质的lncRNA link-A在RA患者的滑膜组织和Fls中的表达高于正常。RA患者滑膜LINK-A的表达与滑膜炎的严重程度呈正相关。LINK-A基因敲除减少了RA Fls的迁移、侵袭以及基质金属蛋白酶和促炎细胞因子的表达和分泌。在机制上,LINK-A通过调节酪氨酸蛋白激酶6和富含亮氨酸的重复蛋白激酶2介导的缺氧诱导因子-1α来控制RA FLS的炎症和侵袭。另一方面,我们还证明了Link-A可以作为海绵与microRNA 1262结合来控制RA FLS的攻击,但不能控制炎症。我们的研究结果表明,LINK-A水平升高可能与FLS介导的类风湿滑膜炎症和侵袭性有关。LINK-A可能是RA的潜在治疗靶点。
Fibroblast-like synoviocytes (FLSs) play a key role in controlling synovial inflammation and joint destruction in rheumatoid arthritis (RA). The contribution of long noncoding RNAs (lncRNAs) to RA is largely unknown. Here, we show that the lncRNA LINK-A, located mainly in cytoplasm, has higher-than-normal expression in synovial tissues and FLSs from patients with RA. Synovial LINK-A expression was positively correlated with the severity of synovitis in patients with RA. LINK-A knockdown decreased migration, invasion, and expression and secretion of matrix metalloproteinases and proinflammatory cytokines in RA FLSs. Mechanistically, LINK-A controlled RA FLS inflammation and invasion through regulation of tyrosine protein kinase 6–mediated and leucine-rich repeat kinase 2–mediated HIF-1α. On the other hand, we also demonstrate that LINK-A could bind with microRNA 1262 as a sponge to control RA FLS aggression but not inflammation. Our findings suggest that increased level of LINK-A may contribute to FLS-mediated rheumatoid synovial inflammation and aggression. LINK-A might be a potential therapeutic target for RA.
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