Artículos de revistas
Sodium ascorbate kills Candida albicans in vitro via iron-catalyzed Fenton reaction: Importance of oxygenation and metabolism
Fecha
2016-12-01Registro en:
Future Microbiology, v. 11, n. 12, p. 1535-1547, 2016.
1746-0921
1746-0913
10.2217/fmb-2016-0063
2-s2.0-84998704947
Autor
Massachusetts General Hospital
Harvard Medical School
Semmelweis University
Universidade Estadual Paulista (Unesp)
Rhode Island Hospital
Harvard-MIT Division of Health Sciences and Technology
Institución
Resumen
Aim: Ascorbate can inhibit growth and even decrease viability of various microbial species including Candida albicans. However the optimum conditions and the mechanism of action are unclear. Materials/methodology: Candida albicans shaken for 90 min in a buffered solution of ascorbate (90 mM) gave a 5-log reduction of cell viability, while there was no killing without shaking, in growth media with different carbon sources or at 4°C. Killing was inhibited by the iron chelator 2,2′-bipyridyl. Hydroxyphenyl fluorescein probe showed the intracellular generation of hydroxyl radicals. Results/conclusion: Ascorbate-mediated killing of C. albicans depends on oxygenation and metabolism, involves iron-catalyzed generation of hydroxyl radicals via Fenton reaction and depletion of intracellular NADH. Ascorbate could serve as a component of a topical antifungal therapy.