Abstract
DEVELOPMENT OF A WATER-IN-OIL-IN-WATER MULTIPLE EMULSION SYSTEM INTEGRATING BIOMIMETIC AQUEOUS-CORE LIPID NANODROPLETS FOR PROTEIN ENTITY STABILIZATION. PART I: EXPERIMENTAL FACTORIAL DESIGN

Cássia A. Glasser, Marta M.D.C. Vila, Júlio C. Pereira, Marco V. Chaud, José M. Oliveira Júnior, Matthieu Tubino and Victor M. Balcão*

ABSTRACT

Lipid nanoballoons integrating multiple emulsions of the type water-in-oil-in-water enclose, at least in theory, a biomimetic aqueous-core suitable for housing hydrophilic biomolecules such as proteins, peptides and bacteriophage particles. The research effort entertained in this paper reports a full statistical 23x31 factorial design study (three variables at two levels and one variable at three levels) to optimize biomimetic aqueous-core lipid nanoballoons for housing hydrophilic protein entities. The concentrations of protein, lipophilic and hydrophilic emulsifiers, and homogenization speed were set as the four independent variables, whereas the mean particle hydrodynamic size (HS), zeta potential (ZP) and polydispersity index (PI) were set as the dependent variables. The 23x31 factorial design constructed led to optimization of the higher (+1) and lower (-1) levels, with triplicate testing for the central (0) level, thus producing thirty three experiments and leading to selection of the optimized processing parameters as 0.015% (w/w) protein entity, 0.75% (w/w) lipophilic emulsifier (soybean lecithin) and 0.50% (w/w) hydrophilic emulsifier (poloxamer 188). In the present research effort, statistical optimization and production of protein derivatives encompassing full stabilization of their three-dimensional structure, has been attempted via housing said molecular entities within biomimetic aqueous-core lipid nanoballoons integrating a multiple (W/O/W) emulsion.

Keywords: Aqueous-core lipid nanoballoons, protein entities, water-in-oil-in-water multiple emulsions, structural and functional stabilization, statistical factorial design, optimization.


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