ANTI-INFLAMMATORY ACTIVITY OF PLATYCODIN D ON ALCOHOL-INDUCED FATTY LIVER RATS VIA TLR4-MYD88-NF-κB SIGNAL PATH

Area of Science:

• Pharmacology
• Hepatology
• Natural Products Chemistry

Background:

• Alcohol-induced fatty liver (AFL) is a significant health concern.
• Triterpenoid saponins, like Platycodin D (PD) from Platycodon grandiflorum (PG) roots, show therapeutic potential.

Purpose of the Study:

• To evaluate the efficacy of Platycodin D (PD) in ameliorating alcohol-induced fatty liver (AFL).
• To elucidate the underlying molecular mechanisms of PD's protective effects against AFL.

Main Methods:

• An AFL rat model was established using ethanol and fish oil.
• Rats were treated with varying doses of PD (10, 20, 30 mg/kg) for four weeks.
• Assays included liver function enzymes, serum endotoxin, liver lipids, cytokines, and protein/mRNA expression of key inflammatory pathway components (CD14, TLR4, MD-2, MyD88, TRAF-6).

Main Results:

• PD treatment significantly reduced liver injury markers (ALT, AST, TBIL, liver index, TG).
• PD administration markedly decreased serum endotoxin levels and downregulated key inflammatory mediators (MD-2, CD14, TLR4, MyD88, TRAF-6 mRNA).
• PD suppressed NF-κB activation and reduced pro-inflammatory cytokines (TNF-α, IL-6).

Conclusions:

• Platycodin D (PD) demonstrates significant protective effects against alcohol-induced fatty liver (AFL) in rats.
• PD exerts its therapeutic action through anti-inflammatory and anti-endotoxic mechanisms.
• The primary mechanism involves the modulation of the TLR4-MyD88-NF-κB signaling pathway, mitigating alcoholic liver injury.