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Investigation of Detergent‐Modified Enzymomimetic Activities of TEMED‐Templated Nanoceria Towards Fluorescent Detection of Their Cellular Uptake
Author(s) -
Peskova Marie,
Heger Zbynek,
Dostalova Simona,
Fojtu Michaela,
Castkova Klara,
Ilkovics Ladislav,
Vykoukal Vit,
Pekarik Vladimir
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201802496
Subject(s) - catalysis , fluorescence , chemistry , nanoparticle , peroxidase , redox , alkaline phosphatase , catalase , enzyme , in vitro , fluorescein , horseradish peroxidase , combinatorial chemistry , nanotechnology , biochemistry , inorganic chemistry , materials science , physics , quantum mechanics
Ceria nanoparticles can catalyze many redox reactions that resemble reactions catalyzed by naturally occurring enzymes, such as peroxidase, catalase, haloperoxidase or phosphatase. This makes nanoceria an attractive material for biomedical and sensing applications. Presence of detergents dramatically affects the catalytic activity of nanoceria. The catalytic activity is also strongly influenced by biogenic compounds present in the sample. Furthermore, biomedical applications are hindered by the difficulties to detect nanoceria uptake by cells. Therefore, we have developed a new fast and sensitive fluorescent haloperoxidase assay based on fluorescein bromination in presence of CTAB to detect uptake of CeO 2 nanoparticles by cells in vitro . Moreover, catalytic activities of standard nanoceria (CeO 2 ) were compared to nanoceria hydrates (CeO 2 .xH 2 O) that are easier for preparation and might be stabilized by biologically relevant molecules allowing for a specific targeting to cells or tissues. We have developed a new approach to produce CeO 2 .xH 2 O in presence of TEMED and analyzed whether the presence of H 2 O 2 during the synthesis influences the catalytic activity of produced particles.