Tânia Soares1, Daniela Ribeiro1, Carina Proença1, Renan Campos Chisté1, Eduarda Fernandes1, Marisa Freitas2. 1. UCIBIO-REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, 4050-313 Porto, Portugal. 2. UCIBIO-REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, 4050-313 Porto, Portugal. Electronic address: marisafreitas@ff.up.pt.
Abstract
AIMS: Silver nanoparticles (AgNPs) have emerged as an important class of nanomaterials with a wide range of industrial and medical applications. The assessment of AgNPs' biological effects in the human organism is therefore essential to evaluate the impact of these nanomaterials in public health and reassure the ratio benefit/risk. In the present study, the effect of polyvinyl pyrrolidone (PVP)-coated AgNPs with distinct sizes (10 and 50nm) on neutrophils' oxidative burst and toxicity were tested. MAIN METHODS: The effect of AgNPs on human neutrophils viability was evaluated by trypan blue, neutral red and propidium iodide methods. The measurement of neutrophils' oxidative burst was performed using the probe dihydrorhodamine 123. The cytomorphological alterations of human neutrophils exposed to AgNPs were evaluated by optical microscopy and transmission electron microscopy. KEY FINDINGS: It was observed that PVP-coated AgNPs are toxic to human neutrophils being the 10nm AgNPs more toxic than the 50nm AgNPs. The smallest AgNPs lead to membrane damage, impaired lysosomal activity and induce neutrophils' oxidative burst. Despite the production of reactive species, the toxicity of AgNPs is not NADPH oxidase-dependent. SIGNIFICANCE: These data indicate that AgNPs are toxic to human neutrophils in concentration-, time- and size-dependent manner, but independent of NADPH oxidase activation.
AIMS: Silver nanoparticles (AgNPs) have emerged as an important class of nanomaterials with a wide range of industrial and medical applications. The assessment of AgNPs' biological effects in the human organism is therefore essential to evaluate the impact of these nanomaterials in public health and reassure the ratio benefit/risk. In the present study, the effect of polyvinyl pyrrolidone (PVP)-coated AgNPs with distinct sizes (10 and 50nm) on neutrophils' oxidative burst and toxicity were tested. MAIN METHODS: The effect of AgNPs on human neutrophils viability was evaluated by trypan blue, neutral red and propidium iodide methods. The measurement of neutrophils' oxidative burst was performed using the probe dihydrorhodamine 123. The cytomorphological alterations of human neutrophils exposed to AgNPs were evaluated by optical microscopy and transmission electron microscopy. KEY FINDINGS: It was observed that PVP-coated AgNPs are toxic to human neutrophils being the 10nm AgNPs more toxic than the 50nm AgNPs. The smallest AgNPs lead to membrane damage, impaired lysosomal activity and induce neutrophils' oxidative burst. Despite the production of reactive species, the toxicity of AgNPs is not NADPH oxidase-dependent. SIGNIFICANCE: These data indicate that AgNPs are toxic to human neutrophils in concentration-, time- and size-dependent manner, but independent of NADPH oxidase activation.
Authors: Carina Proença; Daniela Ribeiro; Tânia Soares; Sara M Tomé; Artur M S Silva; José L F C Lima; Eduarda Fernandes; Marisa Freitas Journal: Inflammation Date: 2017-08 Impact factor: 4.092
Authors: SungJun Park; Young-Seon Ko; Su Jin Lee; Cheonghoon Lee; Kyoungja Woo; GwangPyo Ko Journal: Environ Sci Pollut Res Int Date: 2018-07-16 Impact factor: 4.223
Authors: Ekaterina A Skomorokhova; Tatiana P Sankova; Iurii A Orlov; Andrew N Savelev; Daria N Magazenkova; Mikhail G Pliss; Alexey N Skvortsov; Ilya M Sosnin; Demid A Kirilenko; Ivan V Grishchuk; Elena I Sakhenberg; Elena V Polishchuk; Pavel N Brunkov; Alexey E Romanov; Ludmila V Puchkova; Ekaterina Yu Ilyechova Journal: Nanotechnol Sci Appl Date: 2020-12-31
Authors: Jennifer A Fraser; Sadie Kemp; Lesley Young; Mark Ross; Morag Prach; Gary R Hutchison; Eva Malone Journal: Sci Rep Date: 2018-05-14 Impact factor: 4.379