Anti-inflammatory Activities and Mechanisms of New Compounds Isolated from the Fruits of Foeniculum vulgare Mill.

Forty-nine compounds, including six previously unknown together with forty-three known ones, were isolated from the fruits of Foeniculum vulgare Mill. Their structures were elucidated using high-resolution electrospray ionization mass spectrometry (HR-ESI-MS), infrared spectroscopy (IR), ultraviolet-visible spectroscopy (UV), nuclear magnetic resonance (NMR), and electronic circular dichroism (ECD) methods. All isolates were evaluated their anti-inflammatory activity. The results indicated that compounds 1, 6, 35 and 45 inhibit lipopolysaccharide(LPS)-induced nitric oxide production in RAW 264.7 macrophages with IC50 values of 17.13 ± 0.74, 14.40 ± 0.54, 112.13 ± 2.08 and 77.02 ± 3.62 μg/mL, respectively. Moreover, the potential targets of the four active ingredients were explored through network pharmacology, revealing that SRC, TP53, AKT1, and PIK3CA may serve as key anti-inflammatory targets. To confirm the potential binding mode, molecular docking was employed, which demonstrated that all active targets except SRC exhibited favorable binding energy with compound 35. Additionally, the anti-inflammatory activities of compounds 1-6 were first observed in this experiment.

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