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Determinação da atividade fotoprotetora e antioxidante em emulsões contendo extrato de Malpighia glabra L. – Acerola
| Content Provider | Semantic Scholar |
|---|---|
| Author | Souza, Franciele Piovesana De Campos, Gabriela Rached Packer, Janaína Fernanda |
| Copyright Year | 2013 |
| Abstract | O emprego de extratos vegetais na tentativa de proteger a pele contra o fotoenvelhecimento vem crescendo muito, uma vez que muitos destes extratos apresentam compostos com atividade fotoprotetora ou sinergica em associacao a filtros solares, alem do alto potencial antioxidante. Esta pesquisa teve como objetivo avaliar a atividade antioxidante e fotoprotetora in vitro do extrato seco de acerola veiculada em emulsoes do tipo O/A e emulsoes acrescidas de filtros solares quimicos. Ensaios fisico-quimicos e microbiologicos foram realizados durante a avaliacao de sua estabilidade. A emulsao composta pelo extrato de acerola apresentou absorcao na regiao UVB com absorbância maxima em 290 nm. Na concentracao utilizada, a acerola nao apresentou FPS≥2, assim nao pode ser considerado planta com potencial fotoprotetor, porem foi confirmada atividade antioxidante na formulacao. A associacao do extrato de acerola com os filtros quimicos apresentou-se estavel frente aos ensaios de estabilidade e acao sinergica na protecao da pele contra os danos induzidos pela radiacao UV. Palavras-chave: Malpighia glabraL. Fotoprotecao. Atividade Antioxidante. ABSTRACT Determination of photoprotective and antioxidant activities in emulsions containing extract of fruit of Malpighia glabra L. (acerola) The use of plant extracts in an attempt to protect the skin against photoaging has increased considerably, since many of these extracts have compounds with photoprotective activity or which act synergistically with sunscreens, and also have a high antioxidant potential. The aim of this study was to assess the in vitroantioxidant and photoprotective activities of dry acerola extract incorporated into O/W emulsions, with or without chemical sunscreen. Physicochemical and microbiological analyses were performed during stability evaluations. The emulsion containing extracts of acerola showed absorption in the UVB region, with maximum absorbance at 290nm. At the concentration used, the acerola did not exhibit SPF≥2 and thus cannot be considered a fruit with photoprotective potential, but antioxidant activity was confirmed in the formulation. The combined emulsion of acerola extract and chemical filters performed well in the stability tests and showed synergistic action in protecting the skin from being damaged by UV irradiation. Keywords: Malpighia glabraL. Photoprotection. Antioxidant Activity |
| Starting Page | 69 |
| Ending Page | 77 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| Volume Number | 34 |
| Alternate Webpage(s) | http://www.packerconsultoria.com.br/wp-content/uploads/2017/04/1747-10836-1-PB.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
