The effect of visible light on gold nanoparticles and some bioeffects on environmental fungi
| Autor: | Felicia Iacomi, Daniela Pricop, Dorina-Emilia Creanga, Lacramioara Oprica, Maria Andries |
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| Rok vydání: | 2016 |
| Předmět: |
Light
Analytical chemistry Metal Nanoparticles Pharmaceutical Science Nanoparticle 02 engineering and technology 010402 general chemistry Photochemistry 01 natural sciences Antioxidants Lipid peroxidation chemistry.chemical_compound Ultraviolet visible spectroscopy Irradiation Surface plasmon resonance Superoxide Dismutase Fungi Surface Plasmon Resonance Catalase 021001 nanoscience & nanotechnology Adaptation Physiological 0104 chemical sciences Oxidative Stress chemistry Colloidal gold Photocatalysis Gold Lipid Peroxidation 0210 nano-technology Visible spectrum |
| Zdroj: | International Journal of Pharmaceutics. 505:255-261 |
| ISSN: | 0378-5173 |
| DOI: | 10.1016/j.ijpharm.2016.04.004 |
| Popis: | The oxidative stress induced by light exposed gold nanoparticles in some microorganism cells was investigated. Gold nanoparticles are currently used in biomedical and pharmaceutical research. For this study citrate-gold nanoparticles were synthesized in alkaline conditions at constant temperature of 85 °C under magnetic stirring. Equal volumes of such prepared colloidal solution, were exposed to visible light at different wavelengths for 90 min at room temperature. The spectra in the visible and ultraviolet range have revealed an increase in the intensity of the absorption band for gold nanoparticles exposed to light, due to the effect of surface plasmon resonance. Versatility of gold nanoparticles photocatalytic action was shown by means of manipulating wavelengths of incident light, which evidenced differences in the bioeffects induced in cellulolytic fungi − known for their environmental role but also for other applications such as in cosmetics industry. The comparative analysis of fungal response to gold nanoparticle stressors has revealed different enzyme activity and lipid peroxidation when fungi were supplied with gold nanoparticles exposed to different wavelength lights. The activity of catalase and superoxide dismutase were remarkably increased for green light exposure of gold nanoparticles suggesting fungi adaption to increased oxidative stress induced by irradiated particles; increased level of lipid peroxidation was showed by high concentration of malondialdehyde for white light exposed gold particles since antioxidant enzymes were less active. |
| Databáze: | OpenAIRE |
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