Lipid bicelle-to-vesicle transition (BVT)

The lipid bicelle-to-vesicle transition is a biophysical phase transformation where discoidal lipid aggregates, known as bicelles, reorganize into closed spherical bilayers called vesicles or liposomes. This transition is typically driven by changes in environmental conditions such as temperature, dilution of short-chain surfactants, or hydration levels, which alter the edge tension and spontaneous curvature of the lipid assembly. In pharmaceutical science, this process is widely utilized in the development of advanced drug delivery systems, particularly for topical and transdermal applications. Small bicelles can penetrate the skin's stratum corneum more effectively than larger vesicles; once inside the tissue, they transition into vesicles that encapsulate and release therapeutic agents. While this mechanism is vital for 'smart' nanocarrier design and membrane protein structural studies using NMR, it represents a physical self-assembly process rather than a biological macromolecule target like a receptor or enzyme.

Other names

Bicelle-to-vesicle phase transitionBicelle-to-liposome transitionBicellar-to-vesicular transitionBVTBicelle transformation

Structural transformation from planar lipid discs to spherical vesicles triggered by changes in surfactant concentration, temperature, or hydration to facilitate drug encapsulation and tissue penetration.