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"Saccorhiza polyschides" used to synthesize gold and silver nanoparticles with enhanced antiproliferative and immunostimulant activity

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"Saccorhiza polyschides" used to synthesize gold and silver nanoparticles with enhanced antiproliferative and immunostimulant activity

González Ballesteros, Noelia; Diego González, Lara; Lastra Valdor, Mariano De La; Grimaldi, Maria; Cavazza, Antonella; Bigi, Franca; Rodríguez Argüelles, Maria Carmen; Simón Vázquez, Rosana
 
DATE : 2021-04
UNIVERSAL IDENTIFIER : http://hdl.handle.net/11093/2672
UNESCO SUBJECT : 2302 Bioquímica ; 2412 Inmunología ; 3207.03 Carcinogénesis ; 2427.07 Algología (Ficología)
DOCUMENT TYPE : article

ABSTRACT :

Over the last years, there has been an increasing trend towards the use of environmentally friendly processes to synthesize nanomaterials. In the case of nanomedicine, the use of bionanofactories with associated biological properties, such as seaweed, has emerged as a promising field of work due to the possibility they open for both the preservation of those properties in the nanomaterials synthesized and/or the reduction of their toxicity. In the present study, gold (Au@SP) and silver (Ag@SP) nanoparticles were synthesized using an aqueous extract of "Saccorhiza polyschides" (SP). Several techniques showed that the nanoparticles formed were spherical and stable, with mean diameters of 14 ± 2 nm for Au@SP and 15 ± 3 nm for Ag@SP. The composition of the biomolecules in the extract and the nanoparticles were also analyzed. The analyses performed indicate that the extract acts as a protective medium, with the particles embedded in it preventing aggregation and coalescence. Au@SP and Ag@SP showed superior immunostimulant and antiproliferative activity on immune and tumor cells, ... [+]
Over the last years, there has been an increasing trend towards the use of environmentally friendly processes to synthesize nanomaterials. In the case of nanomedicine, the use of bionanofactories with associated biological properties, such as seaweed, has emerged as a promising field of work due to the possibility they open for both the preservation of those properties in the nanomaterials synthesized and/or the reduction of their toxicity. In the present study, gold (Au@SP) and silver (Ag@SP) nanoparticles were synthesized using an aqueous extract of "Saccorhiza polyschides" (SP). Several techniques showed that the nanoparticles formed were spherical and stable, with mean diameters of 14 ± 2 nm for Au@SP and 15 ± 3 nm for Ag@SP. The composition of the biomolecules in the extract and the nanoparticles were also analyzed. The analyses performed indicate that the extract acts as a protective medium, with the particles embedded in it preventing aggregation and coalescence. Au@SP and Ag@SP showed superior immunostimulant and antiproliferative activity on immune and tumor cells, respectively, to that of the SP extract. Moreover, the nanoparticles were able to modulate the release of reactive oxygen species depending on the concentration. Hence, both nanoparticles have a significant therapeutic potential for the treatment of cancer or in immunostimulant therapy. [-]

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