Please use this identifier to cite or link to this item: http://repositorio.ufc.br/handle/riufc/73873
Type: Artigo de Periódico
Title: Bioactive extracts of red seaweeds Pterocladiella capillacea and Osmundaria obtusiloba (Floridophyceae: Rhodophyta) with antioxidant and bacterial agglutination potential
Authors: Alencar, Daniel Barroso de
Carvalho, Fátima Cristiane Teles de
Rebouças, Rosa Helena
Santos, Daniel Rodrigues dos
Pires-Cavalcante, Kelma Maria dos Santos
Lima, Rebeca Larangeira de
Baracho, Bárbara Mendes
Bezerra, Rayssa Mendes
Viana, Francisco Arnaldo
Vieira, Regine Helena Silva dos Fernandes
Sampaio, Alexandre Holanda
Sousa, Oscarina Viana de
Saker-Sampaio, Silvana
Keywords: Bioactive compounds;Antioxidant;Specie - Rhodophyta;Bioativos;antioxidante;Especies - Rhodophyta
Issue Date: 2016
Publisher: Asian Pacific Journal of Tropical Medicine
Citation: ALENCAR, Daniel Barroso de; CARVALHO Fátima Cristiane Teles de; REBOUÇAS, Rosa Helena; SANTOS, Daniel Rodrigues dos; PIRES-CAVALCANTE, Maria dos Santos Pires-Cavalcante; LIMA, Rebeca Larangeira de ; BARACHO, Bárbara Mendes; BEZERRA, Rayssa Mendes; VIANA, Francisco Arnaldo; VIEIRA, Regine Helena Silva dos Fernandes ; SAMPAIO, Alexandre Holanda; SOUSA, Oscarina Viana de; SAKER-SAMPAIO, Silvana. Bioactive extracts of red seaweeds Pterocladiella capillacea and Osmundaria obtusiloba (Floridophyceae: Rhodophyta) with antioxidant and bacterial agglutination potential. Asian Pacific Journal of Tropical Medicine, Hong Kong, v. 9, n. 4,p. 372-379, 2016. Disponível em https://doi.org/10.1016/j.apjtm.2016.03.015. Acesso em: 7 ago.2023.
Abstract: To evaluate the antioxidant, antibacterial and bacterial cell agglutination activities of the hexane (Hex) and 70% ethanol (70% EtOH) extracts of two species of red seaweeds Pterocladiella capillacea (P. capillacea) and Osmundaria obtusiloba. In vitro antioxidant activity was determined by DPPH radical scavenging assay, ferric-reducing antioxidant power assay, ferrous ion chelating assay, b-carotene bleaching assay and total phenolic content quantification. Antimicrobial activity was tested using the method of disc diffusion on Mueller-Hinton medium. The ability of algal extracts to agglutinate bacterial cells was also tested. Results: The 70% EtOH extract of the two algae showed the highest values of total phenolic content compared to the Hex extract. The results of DPPH for both extracts (Hex, 70% EtOH) of Osmundaria obtusiloba (43.46% and 99.47%) were higher than those of P. capillacea (33.04% and 40.81%) at a concentration of 1000 mg/mL. As for the ferrous ion chelating, there was an opposite behavior, extracts of P. capillacea had a higher activity. The extracts showed a low ferric-reducing antioxidant power, with optical density ranging from 0.054 to 0.180. Antioxidant activities of all extracts evaluated for b-carotene bleaching were above 40%. There was no antibacterial activity against bacterial strains tested. However, the extracts of both species were able to agglutinate bacterial Gram positive cells of Staphylococcus aureus and Gram negative cells of Escherichia coli, multidrug-resistant Salmonella and Vibrio harveyi. This is the first report of the interaction between these algal extracts, rich in natural compounds with antioxidant potential, and Gram positive and Gram negative bacterial cells.
URI: http://www.repositorio.ufc.br/handle/riufc/73873
ISSN: 1995-7645
Appears in Collections:LABOMAR - Artigos publicados em revistas científicas

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