Polymethoxyflavone Apigenin-Trimethylether Suppresses LPS-Induced Inflammatory Response in Nontransformed Porcine...

Area of Science:

• Cell Biology
• Pharmacology
• Immunology

Background:

• Flavonoids, like apigenin, possess anti-inflammatory properties.
• Intestinal inflammation, often triggered by lipopolysaccharide (LPS), impacts epithelial cell function.
• Investigating novel anti-inflammatory compounds is crucial for gut health.

Purpose of the Study:

• To evaluate the in vitro anti-inflammatory effects of apigenin and apigenin-trimethylether.
• To determine if these flavonoids can attenuate LPS-induced inflammation in intestinal epithelial cells (IPEC-J2).
• To compare the efficacy of apigenin and its methylated analogue in reducing inflammatory markers.

Main Methods:

• Utilized IPEC-J2 cells to model intestinal inflammation.
• Administered apigenin and apigenin-trimethylether to LPS-treated cells.
• Measured mRNA levels of inflammatory markers: IL-6, IL-8, TNF-α, and COX-2.
• Assessed extracellular hydrogen peroxide (H2O2) levels using the Amplex Red assay.

Main Results:

• Both apigenin and apigenin-trimethylether significantly reduced IL-8 gene expression.
• Apigenin-trimethylether effectively decreased TNF-α mRNA levels, unlike apigenin.
• Both compounds significantly lowered COX-2 mRNA levels, with the methylated analogue showing greater efficacy.
• Apigenin (25 μM) reduced IL-6 mRNA, while apigenin-trimethylether did not at this concentration.
• Both flavonoids significantly reduced extracellular H2O2 levels.

Conclusions:

• Apigenin-trimethylether demonstrates significant potential in preventing LPS-induced intestinal inflammation.
• The methylated apigenin analogue may serve as a future therapeutic agent for inflammatory conditions.
• Flavonoids, particularly methylated derivatives, warrant further investigation for their anti-inflammatory applications in the gut.