Up-regulation interleukin-6 and interleukin-8 by activated protein C in lipopolysaccharide-treated human umbilical vein endothelial cells.
- Author:
Yi LI
1
;
Bin DU
;
Jia-qi PAN
;
De-chang CHEN
;
Da-wei LIU
Author Information
- Publication Type:Journal Article
- MeSH: Cells, Cultured; Dose-Response Relationship, Drug; Endothelial Cells; drug effects; metabolism; Enzyme-Linked Immunosorbent Assay; Gene Expression; Humans; Interleukin-6; metabolism; Interleukin-8; metabolism; Lipopolysaccharides; pharmacology; Protein C; physiology; Protein C Inhibitor; pharmacology; RNA, Messenger; drug effects; metabolism; Reverse Transcriptase Polymerase Chain Reaction; Sensitivity and Specificity; Time Factors; Up-Regulation
- From: Journal of Zhejiang University. Science. B 2006;7(11):899-905
- CountryChina
- Language:English
-
Abstract:
OBJECTIVETo investigate the effect of activated protein C (APC) on inflammatory responses in human umbilical vein endothelial cells (HUVEC) stimulated with lipopolysaccharide (LPS).
METHODSThe second passage of collagenase digested HUVEC was divided into the following groups: serum free medium control group (SFM control), phosphate buffer solution control group (PBS control), LPS group with final concentration of 1 microg/ml (LPS group), APC group with final concentration of 7 microg/ml, Pre-APC group (APC pretreatment for 30 min prior to LPS challenge), and Post-APC group (APC administration 30 min after LPS challenge). Supernatant was harvested at 0, 4, 8, 12 and 24 h after LPS challenge. Interleukin-6 (IL-6) and Interleukin-8 (IL-8) levels were analyzed with ELISA. Cells were harvested at 24 h after LPS challenge, and total RNA was extracted. Messenger RNA levels for IL-6 and IL-8 were semi-quantitatively determined by RT-PCR.
RESULTSCompared with control group, IL-6 and IL-8 levels steadily increased 4 to 24 h after LPS stimulation. APC treatment could increase LPS-induced IL-6 and IL-8 production. The mRNA levels of IL-6 and IL-8 exhibited a similar change.
CONCLUSIONAPC can further increase the level of IL-6 and IL-8 induced by LPS. The effect of these elevated cytokines is still under investigation.