期刊
BMB REPORTS
卷 47, 期 6, 页码 318-323出版社
KOREAN SOCIETY BIOCHEMISTRY & MOLECULAR BIOLOGY
DOI: 10.5483/BMBRep.2014.47.6.200
关键词
Inflammation; iNOS; NF-kappa B; Macrophages; Salicortin
资金
- Priority Research Centers Program [2009-0093812]
- National Research Foundation of Korea - Ministry of Education, Science and Technology [2012R1A1A4A01007173]
- Hallym University Specialization Fund [HRF-S-11]
- National Research Foundation of Korea [2012R1A1A4A01007173] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We isolated the phenolic glucoside salicortin from a Populus euramericana bark extract, and examined its ability to suppress inflammatory responses as well as the molecular mechanisms underlying these abilities, using lipopolysaccharide (LPS)-stimulated RAW264.7 cells. Salicortin inhibited iNOS expression and the subsequent production of NO in a dose-dependent manner in the LPS-stimulated RAW264.7 cells. Salicortin significantly suppressed LPS-induced signal cascades of NF-kappa B activation, such as IKK activation, I kappa B alpha phosphorylation and p65 phosphorylation in RAW 264.7 cells. In addition, salicortin inhibited the LPS-induced activation of JNK, but not ERK or p38 MAPK. Furthermore, salicortin significantly inhibited production of pro-inflammatory cytokines, such as TNF-alpha, IL-1 beta and IL-6 in the LPS-stimulated RAW 264.7 cells. These findings suggest that salicortin may show its anti-inflammatory activity by suppressing the LPS-induced expression of pro-inflammatory mediators through inhibition of NF-kappa B and JNK MAPK signaling cascades in macrophages.
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