Antioxidant activity of an Mg(ii) compound containing ferulic acid as a chelator: potential application for active packaging and riboflavin stabilisation

Autor(es)

Marchi, Rafael C. ; Kock, Flavio V. C. ; dos Campos, Isabele A. Soares ; Jesus, Hugo Cesar R. ; Venancio, Tiago ; da Silva, Maria Fatima G. F. ; Fernandes, Joao B. ; Rollini, Manuela ; Limbo, Sara ; Carlos, Rose M.

• Tipo de documento: Artigo Científico
• Fonte: FOOD & FUNCTION; v. 15, n. 3, p. 12-pg., 2023-12-29.

Resumo

Foods rich in riboflavin (Rf) are susceptible to degradation due to oxidative processes with the formation of radicals. Herein, we describe the features and stability of an Mg(II) complex containing ferulic acid (fer) and 1,10-phenanthroline (phen) as chelators: henceforth called Mg(phen)(fer). The electrochemical behavior of Mg(phen)(fer) is pH dependent and results from the stabilisation of the corresponding phenoxyl radical via complexation with Mg(II). This stabilisation enhances the antioxidant activity of Mg(phen)(fer) with respect to free fer and commercial antioxidants. Mg(phen)(fer) scavenges and neutralizes DPPH center dot (IC50 = 15.6 mu mol L-1), ABTS(center dot)(+) (IC50 = 5.65 mu mol L-1), peroxyl radical (IC50 = 5.64 mu g L-1) and O-1(2) (IC50 = 0.7 mu g m(-1)). Mg(phen)(fer) effectively protects riboflavin (Rf) against photodegradation by quenching the singlet excited states of Rf regardless of the conditions. Also, the complex Mg(phen)(fer) was effectively incorporated into starch films, broadening its applications, as shown by microbiological studies. Thus, Mg(phen)(fer) has high potential for use in Rf-rich foods and to become a new alternative to the synthetic antioxidants currently used. (AU)

• Processo FAPESP: 22/06637-0 - Associação entre Doença de Alzheimer e Diabetes Mellitus-2: interação entre proteínas amiloides, toxicidade celular e desenvolvimento de agentes teranósticos
• Beneficiário: Rose Maria Carlos
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/16040-5 - Controle Biorracional de Insetos Pragas
• Beneficiário: Flavio Vinicius Crizostomo Kock
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado