Počet záznamů: 1  

The molecular mass of dextran used to modify magnetite nanoparticles affects insulin amyloid aggregation

  1. 1. 0474865 - BC-A 2018 RIV NL eng J - Článek v odborném periodiku
    Sipošová, K. - Pospíšková, K. - Bednáriková, Z. - Šafařík, Ivo - Šafaříková, Miroslava - Kubovčíková, M. - Kopčanský, P. - Gázová, Z.
    The molecular mass of dextran used to modify magnetite nanoparticles affects insulin amyloid aggregation.
    Journal of Magnetism and Magnetic Materials. Roč. 427, April (2017), s. 48-53. ISSN 0304-8853
    Institucionální podpora: RVO:60077344
    Klíčová slova: amyloid aggregation * nanoparticles * magnetic fluid * dextran * insulin
    Kód oboru RIV: CE - Biochemie
    Obor OECD: Biochemistry and molecular biology
    Impakt faktor: 3.046, rok: 2017

    Protein transformation from its soluble state into amyloid aggregates is associated with amyloid-related diseases. Amyloid deposits of insulin fibrils have been found in the sites of subcutaneous insulin application in patients with prolonged diabetes. Using atomic force microscopy and ThT fluorescence assay we have investigated the interference of insulin amyloid aggregation with superparamagnetic Fe3O4-based nanoparticles (SPIONs) coated with dextran (DEX), molecular mass of dextran was equal to 15-20, 40 or 70 kDa. The obtained data indicate that all three types of dextran coated nanoparticles (NP-FeDEXs) are able to inhibit insulin fibrillization and to destroy amyloid fibrils. The extent of anti-amyloid activities depends on the properties of NP-FeDEXs, mainly on the size of nanoparticles which is determined by molecular mass of dextran molecules. The most effective inhibiting activity was observed for the smallest nanoparticles coated with 1520 kDa dextran. Contrary, the highest destroying activity was observed for the largest NP-FeDEX (70 kDa dextran).
    Trvalý link: http://hdl.handle.net/11104/0277687