Marine-Derived Phosphoeleganin and Its Semisynthetic Derivative Decrease IL6 Levels and Improve Insulin Signaling in...

Area of Science:

• Marine natural products
• Pharmacology
• Biochemistry

Background:

• Marine natural products are promising sources for novel antidiabetic drug discovery.
• Hepatic insulin resistance is a key factor in type 2 diabetes.
• Interleukin-6 (IL6) is implicated in impairing insulin action.

Purpose of the Study:

• To investigate the effects of phosphoeleganin (PE) and its derivatives (PE/2, PE/3) on insulin sensitivity in HepG2 cells.
• To evaluate the impact of PE and its derivatives on insulin receptor (INSR) and AKT phosphorylation.
• To assess the influence of PE and its derivatives on IL6 secretion and expression.

Main Methods:

• Utilized human hepatocellular carcinoma (HepG2) cells.
• Measured insulin-induced phosphorylation of INSR and AKT.
• Assessed the expression and secretion of IL6 and PEPCK.

Main Results:

• PE, PE/2, and PE/3 significantly enhanced insulin-induced INSR and AKT phosphorylation.
• PE and PE/2 showed an additive effect on reducing PEPCK expression.
• PE and PE/2 decreased IL6 secretion and expression under basal and palmitic acid conditions; PE also reduced IL6 under high glucose conditions.

Conclusions:

• Phosphoeleganin (PE) and its derivative PE/2 improve hepatic insulin signaling.
• PE and PE/2 reduce IL6, a key mediator of insulin resistance.
• These marine compounds hold potential for developing new therapeutic strategies for diabetes.