Aqueous and polyphenol-rich Larrea divaricata Cav: extracts as potential skin care agents
; Barreiro Arcos, María Laura
; Saint Martin, Elina Malén
; Cogoi, Laura Carolina
; Alonso, Maria del Rosario
; Anesini, Claudia Alejandra 
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Fecha
09/2021
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Medicinal Plant Communications
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2452-4433
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Resumen
Las células de la piel se ven afectadas por el estrés oxidativo inducido por los rayos ultravioleta resultando en foto-envejecimiento y enfermedades. El objetivo de este trabajo fue evaluar el efecto de un extracto acuoso de Larrea divaricata (Aq) y una fracción rica en flavonoides (EA), obtenida por fraccionamiento líquido/líquido, sobre la proliferación de queratinocitos y fibroblastos y sobre la viabilidad celular. Se determinó también el factor de protección solar (SPF) y las actividades simil peroxidasa (Px) y superóxido dismutasa (SOD) y la composición fitoquímica por HPLC-UV y MS/MS. Aq y EA indujeron la proliferación de queratinocitos y fibroblastos, protegieron a los fibroblastos de la apoptosis inducida por H2O2 y ejercieron actividades de tipo SOD y de tipo Px con un factor de protección solar UVB alto. Por lo tanto, L. divaricata podría utilizarse para el desarrollo de nuevos dermocosméticos o adyuvantes fitoterápicos en enfermedades oxidativas de piel.
Skin cells are affected by UV-induced oxidative stress resulting in photoaging and diseases. The objective of this work was to assess the effect of an aqueous extract of Larrea divaricata (Aq) and a flavonoid rich fraction (EA), obtained by liquid/liquid fractionation, on the proliferation of keratinocytes and fibroblasts by the tritiated thymidine uptake assay and on cell viability by the trypan blue exclusion assay. The in vitro sun protection factor (SPF), peroxidase (Px)-like and superoxide dismutase (SOD)-like activities were determined by kinetic spectrophotometric assays, and the phytochemical composition was determined by HPLC-UV and HPLC MS/MS. Aq and EA induced keratinocytes and fibroblast proliferation, protected fibroblasts from H2O2-induced apoptosis and exerted SOD-like and Px-like activities. Aq and EA had a high sun UVB protection factor. So, L. divaricata could be used in a future for the development of new dermocosmetic or phytotherapy adjuvant in skin oxidative damage.
Skin cells are affected by UV-induced oxidative stress resulting in photoaging and diseases. The objective of this work was to assess the effect of an aqueous extract of Larrea divaricata (Aq) and a flavonoid rich fraction (EA), obtained by liquid/liquid fractionation, on the proliferation of keratinocytes and fibroblasts by the tritiated thymidine uptake assay and on cell viability by the trypan blue exclusion assay. The in vitro sun protection factor (SPF), peroxidase (Px)-like and superoxide dismutase (SOD)-like activities were determined by kinetic spectrophotometric assays, and the phytochemical composition was determined by HPLC-UV and HPLC MS/MS. Aq and EA induced keratinocytes and fibroblast proliferation, protected fibroblasts from H2O2-induced apoptosis and exerted SOD-like and Px-like activities. Aq and EA had a high sun UVB protection factor. So, L. divaricata could be used in a future for the development of new dermocosmetic or phytotherapy adjuvant in skin oxidative damage.
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