Comprehensive Insights into the Cholesterol-Mediated Modulation of Membrane Function Through Molecular Dynamics...

Area of Science:

• Membrane biophysics and lipid-based nanotechnology.
• Investigates the role of cholesterol in biological and synthetic membranes.

Background:

• Cholesterol is essential for biological membrane stability and function.
• It is also utilized in synthetic lipid structures like liposomes, proteoliposomes, and nanodiscs.

Purpose of the Study:

• To synthesize findings from molecular dynamics (MD) simulations on cholesterol's role in membrane regulation.
• To provide a comprehensive explanation of cholesterol's complex functions in membrane structure, dynamics, and performance.
• To bridge fundamental biophysics with practical membrane engineering for therapeutic applications.

Main Methods:

• Review and synthesis of results from molecular dynamics (MD) simulations.
• Analysis of cholesterol's impact on lipid ordering, membrane curvature, and protein interactions across various lipid systems.

Main Results:

• Cholesterol modulates membrane properties including lipid density, phase separation (liquid-ordered/liquid-disordered), and rigidity.
• It influences membrane thickness, permeability, curvature, and protein-membrane interactions in both planar and curved bilayers.
• Cholesterol enhances the stability and functionality of liposomes, nanodiscs, and proteoliposomes for drug delivery and research.

Conclusions:

• Cholesterol's multifaceted role is critical for membrane integrity and function in diverse biological and engineered systems.
• MD simulations offer key insights into cholesterol's mechanisms, supporting the rational design of stable lipid-based systems for medical use.
• This review highlights cholesterol's importance for advancing membrane engineering and therapeutic strategies.