Protective Effects of Geniposide on Hepatic Ischemia/Reperfusion Injury

Area of Science:

• Pharmacology
• Hepatology
• Molecular Biology

Background:

• Geniposide (GEN), a key component of Gardenia jasminoides Ellis, exhibits anti-inflammatory and anti-apoptotic properties.
• Hepatic ischemia/reperfusion (I/R) injury is significantly influenced by inflammatory and apoptotic processes.
• GEN is traditionally used for treating ischemia-related conditions.

Purpose of the Study:

• To investigate the protective effects of geniposide against hepatic I/R injury in a mouse model.
• To elucidate the underlying molecular mechanisms of geniposide's action in hepatic I/R injury.

Main Methods:

• Hepatic I/R injury was induced in Sprague-Dawley rats by clamping liver lobes.
• Rats were pretreated with varying doses of GEN (5, 10, 20 mg/kg) or saline.
• Liver pathology, serum enzyme levels (ALT, AST, LDH), and protein expression (PI3K, Akt, p-Akt, mTOR, Bax, BCL-2, IL-6, MCP-1, TNF-α) were assessed after reperfusion.

Main Results:

• GEN pretreatment significantly reduced liver injury markers (ALT, AST, LDH) and apoptosis markers (Bax, TNF-α, IL-6, MCP-1) compared to the I/R group.
• GEN increased the expression of anti-apoptotic protein BCL-2 and activated the PI3K/Akt/mTOR pathway (increased p-Akt and mTOR).
• Histological examination showed reduced inflammatory cell infiltration and cellular damage in GEN-treated groups.

Conclusions:

• Geniposide demonstrates significant protective effects against hepatic I/R injury in rats.
• The mechanism involves the suppression of inflammation and apoptosis.
• Activation of the PI3K/Akt/mTOR signaling pathway is crucial for geniposide's protective action.