%0 Journal Article
%T Cytotoxic and radical activities of metal-organic framework modified with iron oxide: Biological and physico-chemical analyses.
%A Kicheeva AG
%A Sushko ES
%A Bondarenko LS
%A Baimuratova RK
%A Kydralieva KA
%A Schwaminger SP
%A Prassl R
%A Tropskaya NS
%A Dzhardimalieva GI
%A Smirnykh DV
%A Martynova AA
%A Kudryasheva NS
%J Chem Biol Interact
%V 399
%N 0
%D 2024 Aug 25
%M 39025288
%F 5.168
%R 10.1016/j.cbi.2024.111150
%X Metal-organic framework (MOF) modified with iron oxide, Fe3O4-MOF, is a perspective drug delivery agent, enabling magnetic control and production of active hydroxyl radicals, •OH, via the Fenton reaction. This paper studies cytotoxic and radical activities of Fe-containing nanoparticles (NPs): Fe3O4-MOF and its components - bare Fe3O4 and MOF (MIL-88B). Luminous marine bacteria Photobacteriumphosphoreum were used as a model cellular system to monitor bioeffects of the NPs. Neither the NPs of Fe3O4-MOF nor MOF showed cytotoxic effects in a wide range of concentrations (<10 mg/L); while Fe3O4 was toxic at >3·10-3 mg/L. The NPs of Fe3O4 did not affect the bacterial bioluminescence enzymatic system; their toxic effect was attributed to cellular membrane processes. The integral content of reactive oxygen species (ROS) was determined using a chemiluminescence luminol assay. Bacteria mitigated excess of ROS in water suspensions of Fe3O4-MOF and MOF, maintaining bioluminescence intensity closer to the control; this resulted in low toxicity of these NPs. We estimated the activity of •OH radicals in the NPs samples with physical and chemical methods - spin capture technology (using electron paramagnetic resonance spectroscopy) and methylene blue degradation. Physico-chemical interpretation of cellular responses is provided in terms of iron content, iron ions release and •OH radical production.