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Fernandes-Negreiros MM, Batista LANC, Silva Viana RL, Araujo Sabry D, Paiva AAO, Paiva WS, Machado RIA, de Sousa Junior FL, de Lima Pontes D, Vitoriano JDO, Alves Junior C, Lanzi Sassaki G, Rocha HAO. Gallic Acid-Laminarin Conjugate Is a Better Antioxidant than Sulfated or Carboxylated Laminarin. Antioxidants (Basel) 2020; 9:antiox9121192. [PMID: 33260982 PMCID: PMC7759860 DOI: 10.3390/antiox9121192] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/19/2020] [Accepted: 11/21/2020] [Indexed: 12/11/2022] Open
Abstract
A 12.4 kDa laminarin (LM) composed of β(1→3)-glucan with β(1→6)-branches was extracted from brown seaweed Lobophora variegata and modified via carboxylation using dielectric barrier discharge (LMC), conjugation with gallic acid (LMG), and sulfation (LMS). Analyses of the chemical composition of LMC, LMG, and LMS yielded 11.7% carboxyl groups, 1.5% gallic acid, and 1.4% sulfate content, respectively. Antioxidant activities of native and modified laminarins were assessed using six different in vitro methods. Sulfation stopped the antioxidant activities of LM. On the other hand, carboxylation improved cooper chelation (1.2 times). LMG was found to be a more efficient antioxidant agent than LM in terms of copper chelation (1.3 times), reducing power (1.3 times), and total antioxidant capacity (80 times). Gallic acid conjugation was further confirmed using Fourier transform infrared spectroscopy (FT-IR) and one- and two-dimensional NMR spectroscopy analyses. LMG also did not induce cell death or affect the cell cycle of Madin–Darby canine kidney (MDCK) cells. On the contrary, LMG protected MDCK cells from H2O2-induced oxidative damage. Taken together, these results show that LMG has the potent antioxidant capacity, and, therefore, potential applications in pharmacological and functional food products.
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Affiliation(s)
- Marília Medeiros Fernandes-Negreiros
- Department of Biochemistry, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte 59.078-970, Brazil; (M.M.F.-N.); (L.A.N.C.B.); (R.L.S.V.); (D.A.S.); (W.S.P.); (R.I.A.M.)
| | - Lucas Alighieri Neves Costa Batista
- Department of Biochemistry, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte 59.078-970, Brazil; (M.M.F.-N.); (L.A.N.C.B.); (R.L.S.V.); (D.A.S.); (W.S.P.); (R.I.A.M.)
| | - Rony Lucas Silva Viana
- Department of Biochemistry, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte 59.078-970, Brazil; (M.M.F.-N.); (L.A.N.C.B.); (R.L.S.V.); (D.A.S.); (W.S.P.); (R.I.A.M.)
| | - Diego Araujo Sabry
- Department of Biochemistry, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte 59.078-970, Brazil; (M.M.F.-N.); (L.A.N.C.B.); (R.L.S.V.); (D.A.S.); (W.S.P.); (R.I.A.M.)
| | | | - Weslley Souza Paiva
- Department of Biochemistry, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte 59.078-970, Brazil; (M.M.F.-N.); (L.A.N.C.B.); (R.L.S.V.); (D.A.S.); (W.S.P.); (R.I.A.M.)
| | - Raynara Iusk Araujo Machado
- Department of Biochemistry, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte 59.078-970, Brazil; (M.M.F.-N.); (L.A.N.C.B.); (R.L.S.V.); (D.A.S.); (W.S.P.); (R.I.A.M.)
| | - Francimar Lopes de Sousa Junior
- Laboratório de Química de Coordenação e Polímeros-LQCPol, Instituto de Química, Universidade Federal do Rio Grande do Norte—UFRN, Natal-RN 59.078-970, Brazil; (F.L.d.S.J.); (D.d.L.P.)
| | - Daniel de Lima Pontes
- Laboratório de Química de Coordenação e Polímeros-LQCPol, Instituto de Química, Universidade Federal do Rio Grande do Norte—UFRN, Natal-RN 59.078-970, Brazil; (F.L.d.S.J.); (D.d.L.P.)
| | - Jussier de Oliveira Vitoriano
- Centro Integrado de Inovação Tecnológica do Semiárido (CiTED), Universidade Federal Rural do Semi-Árido, Mossoró 59.625-900, Brazil; (J.d.O.V.); (C.A.J.)
| | - Clodomiro Alves Junior
- Centro Integrado de Inovação Tecnológica do Semiárido (CiTED), Universidade Federal Rural do Semi-Árido, Mossoró 59.625-900, Brazil; (J.d.O.V.); (C.A.J.)
| | | | - Hugo Alexandre Oliveira Rocha
- Department of Biochemistry, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte 59.078-970, Brazil; (M.M.F.-N.); (L.A.N.C.B.); (R.L.S.V.); (D.A.S.); (W.S.P.); (R.I.A.M.)
- Correspondence: ; Tel.: +55-84-99999-9561
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Fernandes-Negreiros MM, Araújo Machado RI, Bezerra FL, Nunes Melo MC, Alves MGCF, Alves Filgueira LG, Morgano MA, Trindade ES, Costa LS, Rocha HAO. Antibacterial, Antiproliferative, and Immunomodulatory Activity of Silver Nanoparticles Synthesized with Fucans from the Alga Dictyota mertensii. Nanomaterials (Basel) 2017; 8:nano8010006. [PMID: 29295570 PMCID: PMC5791093 DOI: 10.3390/nano8010006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 12/15/2017] [Accepted: 12/18/2017] [Indexed: 12/25/2022]
Abstract
In this study, we aimed to synthesize silver nanoparticles containing fucans from Dictyota mertensii (Martius) Kützing using an environmentally friendly method and to characterize their structure as well as antiproliferative, immunomodulatory, and antibacterial effects. Fucan-coated silver nanoparticles (FN) were characterized by Fourier-transform infrared analysis, dynamic light scattering, zeta potential, atomic force microscopy, energy dispersive X-ray spectroscopy, and inductively coupled plasma emission spectrometry. They were evaluated for their effect on cell viability, minimum inhibitory bactericidal concentration, and release of nitric oxide and cytokines. The FN were successfully synthesized using an environmentally friendly method. They were size-stable for 16 months, of a spherical shape, negative charge (-19.1 mV), and an average size of 103.3 ± 43 nm. They were able to inhibit the proliferation of the melanoma tumor cell line B16F10 (60%). In addition, they had immunomodulatory properties: they caused an up to 7000-fold increase in the release of nitric oxide and cytokines (IL-10; IL-6 and TNF-α) up to 7000 times. In addition, the FN showed inhibitory effect on Gram-positive and -negative bacteria, with MIC values of 50 µg/mL. Overall, the data showed that FN are nanoparticles with the potential to be used as antitumor, immunomodulatory, and antibacterial agents.
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Affiliation(s)
| | - Raynara Iusk Araújo Machado
- Department of Biochemistry, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte 59078-970, Brazil.
| | - Fabiana Lima Bezerra
- Department of Microbiology and Parasitology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte 59078-970, Brazil.
| | - Maria Celeste Nunes Melo
- Department of Microbiology and Parasitology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte 59078-970, Brazil.
| | | | | | - Marcelo Antonio Morgano
- Food Science and Quality Center (CCQA), Institute of Food Technology (ITAL), Campinas 13070-178, Brazil.
| | | | - Leandro Silva Costa
- Federal Institute of Education, Science and Technology of Rio Grande do Norte (IFRN), Ceara-Mirim, Rio Grande do Norte 59900-000, Brazil.
| | - Hugo Alexandre Oliveira Rocha
- Department of Biochemistry, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte 59078-970, Brazil.
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