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The aim of this study was to investigate the anti-inflammatory properties of Pandanus conoideus Lamk (red fruit oil [RFO]) and establish the signal pathway of the leading compounds. RAW 264.7 murine macrophage cells were used with lipopolysaccharide (LPS). Cell viability and the pro-inflammatory factors were investigated using MTT assay, real-time polymerase chain reaction (PCR), western blot analysis, and enzyme-linked immunosorbent assay. The quantification of leading compounds in RFO was performed using high-performance liquid chromatography (HPLC). RFO did not reduce RAW 264.7 cell viability. RFO significantly reduced the production of nitric oxide (NO), cyclooxygenase-2, and prostaglandin E 2 , and both the protein level and mRNA level of inducible NO synthase in LPS-induced macrophages. RFO also regulated the reactive oxygen species (ROS) in LPS-induced macrophages. RFO attenuated the translocation of the nuclear factor κB (NF-κB) p65 subunit, phosphorylation of I-κB, p38, extracellular signal-regulated kinase, and c-Jun N-terminal kinase (JNK) in a dose-dependent manner. HPLC analysis determined that 1 g of RFO had 14.05 ± 0.8 mg of β-cryptoxanthin and 7.4 ± 0.7 mg of β-carotene. In conclusion, RFO provides an anti-inflammatory effect by regulating ROS and NF-κB through mitogen-activated protein kinase due to antioxidant activity.

Pandanus conoideus Lamk Oil Protects Against Inflammation Through Regulating Reactive Oxygen Species in LPS-Induced Murine Macrophages