| Autor: |
da Silva, Suéllen Pedrosa, da Costa, Clarice Barbosa Lucena, de Freitas, Anderson Felipe Soares, da Silva, José Dayvid Ferreira, Costa, Wêndeo Kennedy, da Silva, Wênio Sandoval Filho Lima, Machado, Janaina Carla Barbosa, da Silva, Sandra Maria Souza, Ferreira, Magda Rhayanny Assunção, Soares, Luiz Alberto Lira, da Costa Silva Neto, Jacinto, da Silva, Márcia Vanusa, de Oliveira, Alisson Macário, Paiva, Patrícia Maria Guedes, Napoleão, Thiago Henrique |
| Zdroj: |
Toxicological Research; April 2023, Vol. 39 Issue: 2 p179-190, 12p |
| Abstrakt: |
The present study aimed to evaluate saline extracts from the leaves (LE) and stem (SE) of Portulaca elatiorin relation to their phytochemical composition and photoprotective and antioxidant effects, as well as to evaluate the toxicity of the leaf extract. The extracts were characterized for protein concentration and phenol and flavonoid contents, as well as for thin layer chromatography (TLC) and high-performance liquid chromatography (HPLC) profiles. Total antioxidant capacity and DPPH and ABTS+scavenging activities were determined. In the photoprotective activity assay, the sun protection factor (SPF) was calculated. The toxicity evaluation of LE included in vitro hemolytic assay and in vivo oral and dermal acute toxicity assays in Swiss mice. LE showed the highest protein, phenol, and flavonoid (8.79 mg/mL, 323.46 mg GAE/g, and 101.96 QE/g, respectively). TLC revealed the presence of flavonoids, reducing sugars, terpenes, and steroids in both extracts. In HPLC profiles, LE contained flavonoids, while SE contained flavonoids and ellagic tannins. The antioxidant activity assays showed the lowest IC50values (34.15–413.3 µg/mL) for LE, which presented relevant SPF (> 6) at 50 and 100 µg/mL. LE demonstrated low hemolytic capacity, and no signs of intoxication were observed in mice treated orally or topically at 1000 mg/kg. However, at 2000 mg/kg, an increase in the mean corpuscular volume of erythrocytes and a reduction in lymphocytes were observed; animals treated topically with 2000 mg/kg displayed scratching behavior during the first hour of observation and showed edema and erythema that regressed after six days. In conclusion, LE did not present acute oral or dermal toxicity in Swiss mice at a dose of 1000 mg/kg and showed slight toxicity in animals treated with 2000 mg/kg. |
| Databáze: |
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