Efficacy of a resveratrol nanoformulation based on a commercially available liposomal platform

Scalability is one of the important factors slowing down or even impeding the clinical translation of nanoparticle-based systems. The latter need to be manufactured at a high level of quality, with batch-to-batch reproducibility, and need to be stable after the manufacturing process, during long-term storage and upon clinical administration. In this study, a vesicular formulation intended for cutaneous applications was developed by the easy reconstitution of a commercially available liposomal platform. Resveratrol, a naturally occurring compound with potent antioxidant activity, and Tween80, a hydrophilic non-ionic surfactant, were included in the formulation. The physico-chemical properties of the vesicles were assessed using light scattering and cryogenic transmission electron microscopy. Nanosized (around 80 nm) spherical and elongated, unilamellar vesicles were produced, with remarkable storage stability. The incorporation of resveratrol in the vesicular system did not alter its strong antioxidant activity, as demonstrated by antioxidant colorimetric assays (DPPH and FRAP). Furthermore, the resveratrol liposomes were cytocompatible with fibroblasts and capable of protecting skin cells from oxidative stress by reducing both endogenous and chemically induced reactive oxygen species more effectively than free resveratrol. Therefore, the proposed formulation, based on the use of a commercially available liposomal platform, represents an easy-to-prepare, reproducible, up-scaled and efficient means of delivering resveratrol and potentiating its biological activity in vitro