Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 16, Issue 11, Pages 27589-27598Publisher
MDPI
DOI: 10.3390/ijms161126048
Keywords
brazilein; inflammation; functional food; health benefits; NF-B; toll-like receptors; MAPK; IRAK4
Funding
- National Research Foundation of Korea (NRF) - Ministry of Education [2013R1A1A206424]
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The medicinal herbal plant has been commonly used for prevention and intervention of disease and health promotions worldwide. Brazilein is a bioactive compound extracted from Caesalpinia sappan Linn. Several studies have showed that brazilein exhibited the immune suppressive effect and anti-oxidative function. However, the molecular targets of brazilein for inflammation prevention have remained elusive. Here, we investigated the mechanism underlying the inhibitory effect of brazilein on LPS-induced inflammatory response in Raw264.7 macrophage cells. We demonstrated that brazilein decreased the expression of IRAK4 protein led to the suppression of MAPK signaling and IKK, and subsequent inactivation of NF-B and COX2 thus promoting the expression of the downstream target pro-inflammatory cytokines such as IL-1, MCP-1, MIP-2, and IL-6 in LPS-induced Raw264.7 macrophage cells. Moreover, we observed that brazilein reduced the production of nitrite compared to the control in LPS-induced Raw264.7. Thus, we suggest that brazilein might be a useful bioactive compound for the prevention of IRAK-NF-B pathway associated chronic diseases.
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