Toxicological Research

  • 제39권2호
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  • Pages.179-190
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  • 2023
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  • 1976-8257(pISSN)
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  • 2234-2753(eISSN)
한국독성학회 (Korean Society of Toxicology & Korea Environmental Mutagen Society)
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DOI QR코드

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Saline extract of Portulaca elatior leaves with photoprotective and antioxidant activities does not show acute oral and dermal toxicity in mice

  • 투고 : 2022.07.28
  • 심사 : 2022.11.28
  • 발행 : 2023.04.15
⟨ 이전 논문 다음 논문 ⟩

초록

The present study aimed to evaluate saline extracts from the leaves (LE) and stem (SE) of Portulaca elatior in 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 IC50 values (34.15-413.3 ㎍/mL) for LE, which presented relevant SPF (>6) at 50 and 100 ㎍/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.

키워드

과제정보

The authors express their gratitude to the Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) for financial support (407192/2018-2) and investigator research grants (PMGP and THN). We are also grateful to the Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES; Finance Code 001) and the Fundacao de Amparo a Ciencia e Tecnologia do Estado de Pernambuco (FACEPE: APQ 0108-2.08/14) for financial support. SPS would like to thank CAPES for the graduate scholarship.

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