Abstract

Eulophia macrobulbon (EM) extract-loaded transferosomes represent an advanced approach for enhancing skin permeation of bioactive compounds. The formulations improving skin permeation and characterizations of transferosomes were studied, including morphology, entrapment efficiency (EE), vesicle size, polydispersity index (PDI), zeta potential, and skin permeation in the Strat-M® synthetic membrane. Vesicle size increased with increasing transition temperature (Tm) of phosphatidylcholine and the hydrophilic-lipophilic balance (HLB) of the surfactant used as an edge activator. EM extract-loaded transferosomes with varying amounts of phosphatidylcholine, surfactants, and EM extract showed non-significant differences in EE, PDI, and zeta potential. The results demonstrated that the EM extract-loaded transferosomes improved membrane permeability better than the EM solution. The EM solution exhibited a shorter lag time. Considering the advantages of the EM extract-loaded transferosomes and EM solutions, a combination of both formulations was developed in this study. The results showed that the lag time decreased and membrane permeation increased. This study highlights a novel system combining EM extract-loaded transferosomes and an EM solution, exhibiting considerable improvement in skin permeation and presenting the potential for an efficient transdermal drug delivery system for natural bioactive compounds.

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