In vitro evaluation of antioxidant activity of methanolic extracts obtained from seaweeds endemic to the coast of Ceará, Brazil
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The aim of the present research was to evaluate the antioxidant activity of six species of marine algae (Caulerpa cupressoides, Ulva fasciata, Amansia multifida, Cryptonemia crenulata, Dictyota dichotoma and Sargassum vulgare) collected in 2011 at Paracuru Beach, Ceará State, Brazil. Methanol extracts were prepared from oven-dried algae and used to measure total phenolic content (TPC) using the Folin- Ciocalteu colorimetric method. In vitro antioxidant activity of the algal extracts (12.5 to 100 mg mL-1) was analyzed by DPPH radical scavenging, ferric-reducing antioxidant power (FRAP) and ferrous ion chelation (FIC). BHA and EDTA were used as positive controls. Based on the standard curve of gallic acid, TPC values ranged from 10.49 to 19.94 mg gallic acid equivalents (GAE) g-1 of extract. DPPH results of algal extracts at all concentrations tested remained between 53.96 and 64.96%, lower than the positive control (BHA). All species showed little FRAP activity (less than 0.1) when compared to BHA. FIC above 20% was detected only in the extract from U. fasciata (100 mg mL-1), while all the others had activities below 17%. The activity of EDTA ranged from approximately 48 (12.5 mg mL-1) to 98% (100 mg mL-1). These results allow us to consider the algae species studied as potentially promising sources of natural antioxidants.
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Seaweed antioxidant capacity in vitro is attributed to the presence of new antioxidant compounds like carotenoids, certain polysaccharides, and polyphenols, which show scavenger activity and can neutralize reactive oxygen species through their own oxidation.
“Different researches have demonstrated seaweed antioxidant capacity in vitro, attributed to the presence of new antioxidant compounds like carotenoids, certain polysaccharides, and polyphenols, which show scavenger activity, being able to neutralize those reactive oxygen species through their own oxidation, since their affinity to those oxidative compounds is very high [56,68,80,81,82,83,84,85].”
From The Potential of Seaweeds as a Source of Functional Ingredients of Prebiotic and Antioxidant Value (2019) · cites this paper as [82]
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- Authors
- Lima, R. L., Pires-Cavalcante, K. M. D. S., Alencar, D. B., Viana, F. A., Sampaio, A. H., & Saker-Sampaio, S.
- Affiliations
- Universidade Federal do Ceará (BR)
- Universidade do Estado do Rio Grande do Norte (BR)
- Venue
- Acta Scientiarum. Technology
- Publisher
- Universidade Estadual de Maringa
- Published
- 2016-04-01
- Volume
- 38
- Issue
- 2
- Pages
- 247
- ISSN
- 1806-2563 (ISSN-L)
- 1807-8664
- OpenAlex
- W2341663689
- Cited by
- 11
- References
- 42
- Citations by year
- 2023: 3 · 2022: 3 · 2021: 1 · 2019: 3 · 2018: 1
- FWCI
- 1.91
- Type
- journal article
- Language
- en
- Open access
- diamond
- doi.org
- Licence
- cc-by
- Locations
- Acta Scientiarum. Technology/Acta scientiarum. Technology (publishedVersion, cc-by)
- Americanae (AECID Library) (publishedVersion, other-oa)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, cc-by)
- Redalyc (Universidad Autónoma del Estado de México) (submittedVersion)
- Funders
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Fundação Cearense de Apoio ao Desenvolvimento Científico e Tecnológico
- Topics
- Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Seaweed-derived Bioactive Compounds
- Health Sciences › Medicine › Biochemistry › Phytochemicals and Antioxidant Activities
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal plant biology
- Keywords
- antioxidant activity, marine algae, seaweed, methanol extract, total phenolic content, DPPH radical scavenging, ferric reducing antioxidant power, ferrous ion chelation, Caulerpa cupressoides, Ulva fasciata, Dictyota dichotoma, Sargassum vulgare, natural antioxidants, Ceará coast
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