Involvement of reactive oxygen species in the bactericidal activity of activated carbon fibre supporting silver; Bactericidal activity of ACF(Ag) mediated by ROS.
An activated carbon fibre supporting silver (ACF(Ag)) was tested for its antibacterial capacity against Escherichia coli (E. coli). Water that has passed through ACF(Ag) demonstrated strong bactericidal ability. This activity decreased over the time suggesting that generated bactericidal species were short lifespan. Since formation of reactive oxygen species (ROS) might be catalysed by silver impregnated and/or ACF itself, implication of ROS and silver was evaluated by the use of ROS scavengers and a silver ions neutralizing agent. The role of ROS in the E. coli mortality was confirmed by the use of a molecular approach which revealed a strong expression of oxidative stress genes.
Le Pape
H
H
UMR 1061 INRA-Université, Universite de Limoges, Institut des Sciences de la Vie et de la Santé, 123 avenue Albert Thomas, 87060 Limoges, France.
Solano-Serena
F
F
Contini
P
P
Devillers
C
C
Maftah
A
A
Leprat
P
P
D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism*; D015964:Gene Expression Regulation, Bacterial / Q000235:genetics; D037742:Nanotubes, Carbon / Q000737:chemistry; D018384:Oxidative Stress / Q000235:genetics; D017382:Reactive Oxygen Species / Q000378:metabolism*; D012834:Silver / Q000737:chemistry
D037742:Nanotubes, Carbon; D017382:Reactive Oxygen Species; D012834:Silver