Lignophenols decrease oleate-induced apolipoprotein-B secretion in HepG2 cells

Area of Science:

• Biochemistry
• Molecular Biology
• Cardiovascular Research

Background:

• Lignin derivatives, lignophenols (LPs), possess antioxidant properties.
• High levels of apolipoprotein-B (apo-B) are linked to coronary heart disease.
• The medicinal properties of LPs, particularly their effect on apo-B, are not well-characterized.

Purpose of the Study:

• To investigate the effect of lignophenols (LPs) on apolipoprotein-B (apo-B) secretion in HepG2 cells.
• To explore the underlying mechanisms by which LPs influence apo-B secretion.

Main Methods:

• HepG2 cells were treated with varying concentrations of LPs and sodium oleate.
• Assessed apo-B secretion, microsomal triglyceride transfer protein (MTTP) mRNA expression, cellular total cholesterol, and mature sterol regulatory element binding protein 2 (SREBP-2) levels.

Main Results:

• LPs significantly decreased oleate-induced apo-B secretion in a dose-dependent manner.
• LPs reduced MTTP mRNA expression and cellular total cholesterol.
• LPs inhibited oleate-induced mature SREBP-2 expression.

Conclusions:

• Lignophenols effectively decrease apo-B secretion in HepG2 cells.
• Modulation of MTTP mRNA expression, cholesterol metabolism, and SREBP-2 are potential mechanisms for LP-mediated apo-B reduction.
• This study highlights the potential therapeutic role of LPs in managing cardiovascular disease risk factors.