Effects of triptolide on the production of interferon-gamma in human peripheral blood mononuclear cell and phosphorylation of signal transducer and activator of transcription-1 and production of interleukin-8 / 中国医学科学院学报
Acta Academiae Medicinae Sinicae
;
(6): 158-162, 2007.
Article
in Chinese
| WPRIM
| ID: wpr-230013
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the effects of triptolide on the production of interferon-gamma (IFN-gamma) in human peripheral blood mononuclear cell (PBMC) and interleukin-8 (IL-8) in HaCaT keratinocytes and phosphorylation of signal transducer and activator of transcription-1 (STAT1) of IFN-gamma signal transduction pathways in HaCaT cells.</p><p><b>METHODS</b>Human PBMC was induced by phytohaemagglutinin (PHA-L) and HaCaT cells were stimulated by recombinant human IFN-gamma (rhIFN-gamma). The productions of IFN-gamma and IL-8 in cells were detected by ELISA. The expression of STAT1 and its phosphorylation were analyzed by Western blot.</p><p><b>RESULTS</b>Triptolide inhibited the production of IFN-gamma in human PBMC induced by PHA-L in a dose-dependent manner (P < 0.05, P < 0.01, P < 0.001) and the 50% inhibitory concentration (IC50) value was 5.96 x 10(-11) mol/L. IL-8 production in HaCaT cells induced by rhIFN-gamma in vitro was also inhibited by triptolide (P < 0.001) and the IC50 value was about 1.15 x 10(-13) mol/L. The expressions of phosphorylated STAT1 in HaCaT cells stimulated by rhIFN-gamma was inhibited by triptolide (P < 0.01) and the IC50 value was about 9.45 x 10(-11) mol/L.</p><p><b>CONCLUSION</b>Triptolide can inhibit the production of IFN-gamma in human PBMC and downregulate IL-8 level in HaCaT keratinocytes induced by rhIFN-gamma. Triptolide can inhibit the phosphorylations of STAT1 of IFN-gamma signal pathway in HaCaT keratinocytes stimulated by IFN-gamma.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pharmacology
/
Phenanthrenes
/
Phosphorylation
/
Leukocytes, Mononuclear
/
Keratinocytes
/
Anti-Inflammatory Agents, Non-Steroidal
/
Interleukin-8
/
Interferon-gamma
/
Diterpenes
/
Epoxy Compounds
Limits:
Humans
Language:
Chinese
Journal:
Acta Academiae Medicinae Sinicae
Year:
2007
Type:
Article
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