Published in:
01-06-2010 | Original Research Paper
Geniposide inhibits interleukin-6 and interleukin-8 production in lipopolysaccharide-induced human umbilical vein endothelial cells by blocking p38 and ERK1/2 signaling pathways
Authors:
Hong-Tao Liu, Jun-Lin He, Wen-Ming Li, Zhu Yang, Ying-Xiong Wang, Juan Yin, Yu-Guang Du, Chao Yu
Published in:
Inflammation Research
|
Issue 6/2010
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Abstract
Objective
The aim of this study was to investigate the inhibitory effect of geniposide on lipopolysaccharide (LPS)-induced interleukin-6 (IL-6) and interleukin-8 (IL-8) production in human umbilical vein endothelial cells (HUVECs).
Materials and methods
Primary HUVECs were used. The mRNA/protein levels of IL-6 and IL-8 was determined by reverse transcription-polymerase chain reaction (RT-PCR) and enzyme-linked immunosorbent assay (ELISA). LPS-induced HUVEC migration and adhesion of monocytes to HUVECs were studied by monolayer wound healing experiments and monocytic cell adhesion assay, respectively. Expression of nuclear factor κB (NF-κB), inhibitory factor κB-α (IκB-α), p38 mitogen-activated protein kinase (MAPK) and ERK1/2 were determined by Western blot analysis.
Results
Geniposide effectively inhibited LPS-induced expression of IL-6 and IL-8 in HUVECs at the transcription and translation levels. Additionally, geniposide suppressed LPS-induced HUVEC migration and U937 monocyte adhesion to HUVECs. Signal transduction studies indicate that geniposide blocked the activation of NF-κB, degradation of IκB-α, and phosphorylation of p38 MAPK and ERK1/2 in HUVECs challenged by LPS.
Conclusion
The results show that geniposide can inhibit LPS-induced IL-6 and IL-8 production in HUVECs by blocking p38 MAPK and ERK1/2 signaling pathways.