title: Comparative study of three magnetic nano-particles (FeSO4, FeSO4/SiO2, FeSO4/SiO2/TiO2) in plasmid DNA extraction.
abstract: Recent updates on Magnetic Nano-Particles (MNPs) based separation of nucleic acids have received more attention due to their easy manipulation, simplicity, ease of automation and cost-effectiveness. It has been indicated that DNA molecules absorb on solid surfaces via hydrogen-bonding, and hydrophobic and electrostatic interactions. These properties highly depend on the surface condition of the solid support. Therefore, surface modification of MNPs may enhance their functionality and specification. In the present study, we functionalized Fe3O4 nano-particle surface utilizing SiO2 and TiO2 layer as Fe3O4/SiO2 and Fe3O4/SiO2/TiO2 and then compare their functionality in the adsorption of plasmid DNA molecules with the naked Fe3O4 nano-particles. The result obtained showed that the purity and amount of DNA extracted by Fe3O4 coated by SiO2 or SiO2/TiO2 were higher than the naked Fe3O4 nano-particles. Furthermore, we obtained pH 8 and 1.5 M NaCl as an optimal condition for desorption of DNA from MNPs. The result further showed that, 0.2 mg nano-particle and 10 min at 55 °C are the optimal conditions for DNA desorption from nano-particles. In conclusion, we recommended Fe3O4/SiO2/TiO2 as a new MNP for separation of DNA molecules from biological sources.
authors: Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran; Gil Nanogene Biotech Co., Research and Development Department, Tehran, Iran. Electronic address: hrahnama@abrii.ac.ir.
authors: H
authors: H
authors: Rahnama
authors: Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.
authors: A
authors: A
authors: Sattarzadeh
authors: Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran; Gil Nanogene Biotech Co., Research and Development Department, Tehran, Iran.
authors: F
authors: F
authors: Kazemi
authors: Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.
authors: N
authors: N
authors: Ahmadi
authors: National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran; Gil Nanogene Biotech Co., Research and Development Department, Tehran, Iran.
authors: F
authors: F
authors: Sanjarian
authors: Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran.
authors: Z
authors: Z
authors: Zand
mesh_terms: D004269:DNA, Bacterial / Q000737:chemistry*; D005296:Ferrous Compounds / Q000737:chemistry*; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D010957:Plasmids / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D004269:DNA, Bacterial; D005296:Ferrous Compounds; D058185:Magnetite Nanoparticles; C009495:titanium dioxide; C020748:ferrous sulfate; D012822:Silicon Dioxide; D014025:Titanium
keywords: Bacterial plasmid; DNA extraction; Magnetic nano-particle (MNPs); PCR; Titania