Curcumin suppresses the production of interleukin-6 in Prevotella intermedia lipopolysaccharide-activated RAW 264.7 cells
Journal of Periodontal & Implant Science
;
: 157-163, 2011.
Article
in English
| WPRIM
| ID: wpr-210447
ABSTRACT
PURPOSE:
Curcumin is known to exert numerous biological effects including anti-inflammatory activity. In this study, we investigated the effects of curcumin on the production of interleukin-6 (IL-6) by murine macrophage-like RAW 264.7 cells stimulated with lipopolysaccharide (LPS) from Prevotella intermedia, a major cause of inflammatory periodontal disease, and sought to determine the underlying mechanisms of action.METHODS:
LPS was prepared from lyophilized P. intermedia ATCC 25611 cells by the standard hot phenol-water method. Culture supernatants were collected and assayed for IL-6. We used real-time polymerase chain reaction to detect IL-6 mRNA expression. IkappaB-alpha degradation, nuclear translocation of NF-kappaB subunits, and STAT1 phosphorylation were characterized via immunoblotting. DNA-binding of NF-kappaB was also analyzed.RESULTS:
Curcumin strongly suppressed the production of IL-6 at both gene transcription and translation levels in P. intermedia LPS-activated RAW 264.7 cells. Curcumin did not inhibit the degradation of IkappaB-alpha induced by P. intermedia LPS. Curcumin blocked NF-kappaB signaling through the inhibition of nuclear translocation of NF-kappaB p50 subunit. Curcumin also attenuated DNA binding activity of p50 and p65 subunits and suppressed STAT1 phosphorylation.CONCLUSIONS:
Although further study is required to explore the detailed mechanism of action, curcumin may contribute to blockade of the host-destructive processes mediated by IL-6 and appears to have potential therapeutic values in the treatment of inflammatory periodontal disease.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Periodontal Diseases
/
Phosphorylation
/
DNA
/
RNA, Messenger
/
Immunoblotting
/
Lipopolysaccharides
/
NF-kappa B
/
Interleukin-6
/
Prevotella intermedia
/
Prevotella
Language:
English
Journal:
Journal of Periodontal & Implant Science
Year:
2011
Type:
Article
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