Detalhes do Documento

Saponin-based natural nanoemulsions as alpha-tocopherol delivery systems for dermal applications

Autor(es): Schreiner, Tatiana B. ; Santamaria-Echart, Arantzazu ; Colucci, Giovana ; Plasencia, Paula ; Costa, Patrícia Santos ; Dias, Madalena M. ; Pinho, Simão ; Barreiro, M.F.

Data: 2023

Identificador Persistente: http://hdl.handle.net/10198/28954

Origem: Biblioteca Digital da UPB

Projeto/bolsa: info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB/00690/2020/PT; info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP/00690/2020/PT; info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB/50020/2020/PT; info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA/P/0045/2020/PT; info:eu-repo/grantAgreement/FCT/projetos financiados com o apoio do Programa Operacional Regional do Norte (POR Norte/Norte 2020)./2021.05215.BD/PT;

Assunto(s): Saponin; Tribulus terrestris; Quillaja bark; Vitamin E; Bioavailability; Franz cells


Descrição

Nanoemulsions can be produced using simple methods and compounds from natural sources. They can increase water dispersibility and bioavailability and optimise active ingredient dispersion in particular skin layers. Lipophilic compounds of the vitamin E family (tocopherols and tocotrienols) are well-known for their high antioxidant activity and capacity to protect the skin from oxidative stress. In this context, oil-in-water (o/w) nanoemulsions with and without α-tocopherol (Vitamin E, VE) were formulated with two emulsifier alternatives, Quillaja saponin (QS), and a combination of QS with Tribulus terrestris (QSTT) (50/50, w/w). The emulsions were evaluated concerning stability, microstructure, droplet size, colour attributes, encapsulation efficiency, UV photostability, antioxidant activity, and in vitro permeation studies to assess the delivery potential. Results showed highly stable systems, with round-shape droplets of 80–121 nm size. QS and QSTT samples’ colours were close to white and light brownish, respectively. The topical nano cream had the capacity to entrap VE, producing a protective effect from UV degradation, and very significant antioxidant activity, with IC50 values around 0.01 %wt. The skin permeation profiles showed the efficiency of the formulations in the delivery of VE, with permeabilities between 64 and 74 μg/cm2, while the control sample showed no VE permeation.

Tipo de Documento Artigo científico
Idioma Inglês
Contribuidor(es) Biblioteca Digital da UPB
Licença CC
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