ESTUDO PRELIMINAR DO EFEITO FOTOQUIMIOPROTETOR DE Campomanesia guaviroba FRENTE À RADIAÇÃO UVB

Ferreira, Lilian dos Anjos Oliveira; Iwanaga, Camila Cristina; Casagrande, Rúbia; Nakamura, Celso V.; Truiti, Maria da Conceição Torrado

doi:10.22533/at.ed.0991902082

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“…The antioxidant activity helps protect the skin by combating reactive oxygen species formed by UV radiation [10]. The extract obtained by maceration required lower concentrations to inhibit 50% of DPPH radicals compared to the extract obtained by infusion (Table 2).…”

Section: Resultsmentioning

confidence: 99%

“…Different fractions (n-hexane, hydromethanolic ethyl acetate and butyl hydroxytoluene) of the ethyl extract of Campomanesia guaviroba (DC.) Kiaersk have already been analysed via L929 fibroblasts for viability against UV-B radiation, where an increase in viability was observed, with emphasis on the ethyl acetate extract [10].…”

Section: Resultsmentioning

confidence: 99%

“…Radiation in the UV-B region that manages to reach the skin causes the production of reactive oxygen species (ROS) and reduces the skin's natural production of antioxidants. In this regard, the presence of antioxidants in products applied to the skin can combat ROS, preventing premature aging and cancer formation [10]. It is estimated that 90% of skin cancer cases are melanoma, of which 86% are related to exposure to UV radiation [11].…”

Section: Introductionmentioning

confidence: 99%

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Photoprotective action, antioxidant activity, and toxicity of aqueous extracts of Campomanesia sessiliflora O. Berg

2022

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Campomanesia sessiliflora O. Berg is a medicinal plant that is object of very few studies in the literature. In this context, the antioxidant activity, sun protection factor (SPF) and toxicity in Artemia salina Leachs were analysed, as well as the contents of phenolic compounds, flavonoids and tannins in aqueous extracts prepared by infusion and maceration of C. sessiliflora leaves. Maceration showed higher levels of phenolic compounds and flavonoids regarding infusion and the two samples had the same tannin content. The LD50 was similar for the extracts, both were considered as low toxicity in the test with A. salina. Infusion presented a SPF of 9.98, while maceration presented a SPF of 6.74. Maceration presented better contents of secondary metabolites and antioxidant activity and infusion presented a better SPF. The extracts have the potential of incorporation into multifunctional products.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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