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Lipopolysaccharide upregulates the expression of Toll-like receptor 4 in human vascular endothelial cells

机译:脂多糖上调人血管内皮细胞中Toll样受体4的表达

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摘要

Objective To investigate the expression of Toll-like receptor 2 (TLR2) and Toll-like receptor 4 (TLR4) and the effect of lipopolysaccharide (LPS) on their expression in cultured endothelial cells. Methods Total RNA was extracted from ECV304 cells and isolated human umbilical vein endothelial cells (HUVECs) exposed to LPS, respectively. The quantification of TLR2 and TLR4 mRNA in HUVECs and EVC304 cells was carried out by reverse transcriptase-polymerase chain reaction (RT-PCR). Results ECV304 cells and HUVECs were able to express TLR2 and TLR4 mRNA, but the expression levels of TLR4 appeared to be stronger than those of TLR2. LPS could upregulate the expression levels of TLR4 obviously, whereas it had no effect on the expression level of TLR2. Conclusions Our data indicate that TLR4 may be the LPS signal transducer in endothelial cells and plays important roles in the cell activation of LPS. The ECV304 cell line is a better experimental model than isolated HUVECs in the research of endothelial cells.
机译:目的探讨Toll样受体2(TLR2)和Toll样受体4(TLR4)的表达以及脂多糖(LPS)对培养的内皮细胞表达的影响。方法分别从暴露于LPS的ECV304细胞和分离的人脐静脉内皮细胞(HUVEC)中提取总RNA。 HUVEC和EVC304细胞中TLR2和TLR4 mRNA的定量通过逆转录聚合酶链反应(RT-PCR)进行。结果ECV304细胞和HUVEC能够表达TLR2和TLR4 mRNA,但TLR4的表达水平似乎强于TLR2。 LPS可以明显上调TLR4的表达水平,而对TLR2的表达水平没有影响。结论我们的数据表明TLR4可能是内皮细胞中LPS的信号转导子,并在LPS的细胞活化中起重要作用。在内皮细胞研究中,ECV304细胞系是比分离的HUVEC更好的实验模型。

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