...
首页> 外文期刊>Journal of orthopaedic research >P2Y(2) receptors and GRK2 are involved in oscillatory fluid flow induced ERK1/2 responses in chondrocytes.
【24h】

P2Y(2) receptors and GRK2 are involved in oscillatory fluid flow induced ERK1/2 responses in chondrocytes.

机译:P2Y(2)受体和GRK2参与振荡流体流动诱导软骨细胞中的ERK1 / 2反应。

获取原文
获取原文并翻译 | 示例
           

摘要

Mechanical loading is an important factor regulating cartilage metabolism maintained by chondrocytes. However, some of its underlying mechanisms remain poorly understood. In this study, we employed a chondrogenic cell line ATDC5 to investigate roles of P2Y(2) and GRK2 in chondrocyte mechanotransduction. We first confirmed the expression of chondrocyte markers in differentiated ATDC5 cells. We then exposed both differentiated and undifferentiated ATDC5 cells to oscillatory fluid flow, and found that differentiated ATDC5 cells responded to oscillatory fluid flow by increasing COX-2 and aggrecan expressions. More importantly, fluid flow induced ERK1/2 response in differentiated cells was increased more than 10 times compared to those in undifferentiated cells. Furthermore, we found that P2Y(2) mRNA and protein levels in differentiated ATDC5 cells were significantly higher than those in undifferentiated cells. In contrast, GRK2 protein levels in differentiated cells were significantly lower than those in undifferentiated cells. Finally, overexpressions of P2Y(2) and GRK2 in differentiated ATDC5 cells result in a 34% increase and a 21% decrease of the ERK1/2 phosphorylation, respectively, in response to oscillatory fluid flow, suggesting important roles of P2Y(2) and GRK2 in chondrocyte mechanotransduction.
机译:机械负荷是调节软骨细胞维持软骨代谢的重要因素。但是,它的一些基本机制仍然知之甚少。在这项研究中,我们采用软骨细胞系ATDC5来研究P2Y(2)和GRK2在软骨细胞机械转导中的作用。我们首先确认了分化的ATDC5细胞中软骨细胞标志物的表达。然后,我们将分化和未分化的ATDC5细胞暴露于振荡的流体流中,发现分化的ATDC5细胞通过增加COX-2和聚集蛋白聚糖的表达来响应振荡的流体流。更重要的是,与未分化细胞相比,在分化细胞中流体流动诱导的ERK1 / 2反应增加了10倍以上。此外,我们发现分化的ATDC5细胞中的P2Y(2)mRNA和蛋白水平明显高于未分化的细胞。相反,分化细胞中的GRK2蛋白水平显着低于未分化细胞中的GRK2蛋白水平。最后,P2Y(2)和GRK2在分化的ATDC5细胞中的过表达分别导致振荡流体流动,导致ERK1 / 2磷酸化分别增加34%和21%,这表明P2Y(2)和GRK2在软骨细胞机械转导中。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号