Intracellular Iron Binding and Antioxidant Activity of Phytochelators

Autor(es)

Silva, Fredson Torres ^[1] ; Esposito, Breno Pannia ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Chem, Dept Fundamental Chem, Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BIOLOGICAL TRACE ELEMENT RESEARCH; OCT 2021.
• Citações Web of Science: 0

Resumo

Phytochelators have been studied as templates for designing new drugs for chelation therapy. This work evaluated key chemical and biological properties of five candidate phytochelators for iron overload diseases: maltol, mimosine, morin, tropolone, and esculetin. Intra- and extracellular iron affinity and antioxidant activity, as well as the ability to scavenge iron from holo-transferrin, were studied in physiologically relevant settings. Tropolone and mimosine (and, to a lesser extent, maltol) presented good binding capacity for iron, removing it from calcein, a high-affinity fluorescent probe. Tropolone and mimosine arrested iron-mediated oxidation of ascorbate with the same efficiency as the standard iron chelator DFO. Also, both were cell permeant and able to access labile pools of iron in HeLa and HepG2 cells. Mimosine was an effective antioxidant in cells stressed by iron and peroxide, being as efficient as the cell-permeant iron chelator deferiprone. These results reinforce the potential of those molecules, especially mimosine, as adjuvants in treatments for iron overload. (AU)

• Processo FAPESP: 18/19684-0 - Aplicações de novos derivados de desferrioxamina com alta permeabilidade celular
• Beneficiário: Breno Pannia Esposito
• Modalidade de apoio: Auxílio à Pesquisa - Regular