Preparation of Model Intercellular Membrane Using Low-Toxic Solvent Ethanol.

Area of Science:

• Biochemistry
• Materials Science
• Dermatology

Background:

• The skin's outermost layer, the stratum corneum, relies on intercellular lipids (IC lipids) like ceramides, cholesterol, and free fatty acids for barrier function.
• Model membranes of these lipids are crucial for studying skin barrier mechanisms.
• Conventional methods use toxic solvents (chloroform, methanol), raising safety and environmental concerns.

Purpose of the Study:

• To develop a safer, environmentally friendly protocol for preparing model intercellular lipid membranes.
• To evaluate the efficacy and comparability of the new protocol against traditional methods.

Main Methods:

• A novel protocol using ethanol (EtOH) to dissolve and mix IC lipids.
• Dilution with buffer and controlled cooling to form lamellar structures.
• Collection of model membranes via centrifugation for analysis.

Main Results:

• The ethanol-based protocol successfully prepared model intercellular lamellae.
• The resulting membranes exhibited thermodynamic and structural properties comparable to those made with chloroform/methanol.
• The EtOH protocol showed enhanced miscibility of IC lipids.

Conclusions:

• The developed ethanol-based protocol offers a safer and more environmentally hygienic alternative for preparing model skin barrier membranes.
• This methodology is suitable for research requiring model intercellular lamellae, aligning with green chemistry principles.