title: Comparative study on toxicity of extracellularly biosynthesized and laboratory synthesized CdTe quantum dots.
abstract: Nanobiosynthesis belongs to the most recent methods for synthesis of nanoparticles. This type of synthesis provides many advantages including the uniformity in particle shape and size. The biosynthesis has also a significant advantage regarding chemical properties of the obtained particles. In this study, we characterized the basic properties and composition of quantum dots (QDs), obtained by the extracellular biosynthesis by Escherichia coli. Furthermore, the toxicity of the biosynthesized QDs was compared to QDs prepared by microwave synthesis. The obtained results revealed the presence of cyan CdTe QDs after removal of substantial amounts of organic compounds, which stabilized the nanoparticle surface. QDs toxicity was evaluated using three cell lines Human Foreskin Fibroblast (HFF), Human Prostate Cancer cells (PC-3) and Breast Cancer cells (MCF-7) and the MTT assay. The test revealed differences in the toxicity between variants of QDs, varying about 10% in the HFF and 30% in the MCF-7 cell lines. The toxicity of the biosynthesized QDs to the PC-3 cell lines was about 35% lower in comparison with the QDs prepared by microwave synthesis.
authors.affiliation: Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic. Electronic address: kominkova.marketa@gmail.com.
authors.forename: Marketa
authors.initials: M
authors.lastname: Kominkova
authors.affiliation: Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic. Electronic address: grizlidripac@gmail.com.
authors.forename: Vedran
authors.initials: V
authors.lastname: Milosavljevic
authors.affiliation: Global Change Research Institute, The Czech Academy of Sciences, v.v.i., Belidla 4a, CZ-603 00 Brno, Czech Republic. Electronic address: vitek.p@czechglobe.cz.
authors.forename: Petr
authors.initials: P
authors.lastname: Vitek
authors.affiliation: Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic; Department of Physiology and Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Kamenice 5, CZ-625 00 Brno, Czech Republic. Electronic address: hana.polanska@gmail.com.
authors.forename: Hana
authors.initials: H
authors.lastname: Polanska
authors.affiliation: Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic. Electronic address: kriki.cihalova@seznam.cz.
authors.forename: Kristyna
authors.initials: K
authors.lastname: Cihalova
authors.affiliation: Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic. Electronic address: simona1dostalova@gmail.com.
authors.forename: Simona
authors.initials: S
authors.lastname: Dostalova
authors.affiliation: Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic. Electronic address: xhynstov@node.mendelu.cz.
authors.forename: Veronika
authors.initials: V
authors.lastname: Hynstova
authors.affiliation: Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic. Electronic address: R.Guran@email.cz.
authors.forename: Roman
authors.initials: R
authors.lastname: Guran
authors.affiliation: Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic. Electronic address: paulko@centrum.cz.
authors.forename: Pavel
authors.initials: P
authors.lastname: Kopel
authors.affiliation: Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic. Electronic address: oliver@centrum.cz.
authors.forename: Lukas
authors.initials: L
authors.lastname: Richtera
authors.affiliation: Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic; Department of Physiology and Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Kamenice 5, CZ-625 00 Brno, Czech Republic. Electronic address: masarik@med.muni.cz.
authors.forename: Michal
authors.initials: M
authors.lastname: Masarik
authors.affiliation: Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic; Department of Geology and Pedology, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic. Electronic address: martin.brtnicky@mendelu.cz.
authors.forename: Martin
authors.initials: M
authors.lastname: Brtnicky
authors.affiliation: Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic; Department of Geology and Pedology, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic. Electronic address: jindrich.kynicky@mendelu.cz.
authors.forename: Jindrich
authors.initials: J
authors.lastname: Kynicky
authors.affiliation: Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic. Electronic address: zitkao@seznam.cz.
authors.forename: Ondrej
authors.initials: O
authors.lastname: Zitka
authors.affiliation: Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic. Electronic address: vojtech.adam@mendelu.cz.
authors.forename: Vojtech
authors.initials: V
authors.lastname: Adam
mesh_terms: D019187:Cadmium Compounds / Q000633:toxicity*; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D004926:Escherichia coli / Q000378:metabolism*; D006801:Humans; D045663:Quantum Dots / Q000633:toxicity*; D013691:Tellurium / Q000633:toxicity*
chemical_list: D019187:Cadmium Compounds; D013691:Tellurium; C028337:cadmium telluride
keywords: Biosynthesis; CdTe; Escherichia coli (E. coli); Quantum dots; Toxicity