Abstract
Morin hydrate (MH) is a bioflavonoid belonging to flavonol class. Despite its pharmacological activities, MH has inherent low aqueous solubility and chemical instability hindering biological applications of this flavonol. In this regard, this study aimed to develop and characterize nanoemulsion containing MH. Nanoemulsion formulations were prepared using phase inversion temperature method and characterized by size, polydispersity index (PdI), physical stability, AFM analysis, incorporation efficiency (IE), and in vitro release. Following the formulation design, F10 formulation was chosen to incorporate MH. Nanoemulsion containing MH (MH-NE) showed droplet size in nanometric scale (< 100 nm) with homogeneous size distribution (PdI < 0.1). In addition, good physical stability of MH-NE was demonstrated using analytical photocentrifugation method where the light transmission profiles did not change throughout the emulsions. According to AFM analysis, oil droplets were mostly spherical or semi-spherical having sizes uniformly distributed. The IE of MH into nanoemulsion was approximately 100%, and in vitro release profile of this flavonol from formulation was gradual throughout the experiment. Therefore, using a reproducible method of low energy emulsification we developed a stable colloidal dispersion of nanoemulsion containing MH.
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