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Graphite particles induce ROS formation in cell free systems and human cells
- Publication Year :
- 2017
-
Abstract
- It is commonly accepted that the toxicity of carbonaceous particulate matter (PM) is due to the production of reactive oxygen species (ROS) which induce biological damage in the exposed cells. It is also known that PM produced during the combustion processes consists of a carbonaceous core "dressed" with other organic and/or inorganic materials. In spite of this knowledge, the role of these materials in the production of ROS has not yet been clear. This work aims at understanding whether "naked" carbonaceous particles are capable of forming ROS either in cell-free or in-cell systems. The problem has been treated based on the data collected from pure graphite samples of different sizes obtained by ball-milling pure graphite for various lengths of time. The experimental approach considered Raman, ESR (spin trapping), cell viability and fluorescence spectroscopy measurements. These techniques allowed us to carry out measurements both in cell and cell-free systems and the results consistently indicate that also pure naked carbonaceous particles can catalyze the electron transfer that produces superoxide ions. The process depends on the particle size and enlightens the role of the edges of the graphitic platelets. Evidence has been collected that even "naked" graphitic nanoparticles are capable of producing ROS and decreasing the cell viability thus representing a potential danger to human health. © 2017 The Royal Society of Chemistry.
- Subjects :
- Materials science
Nanoparticle
Nanotechnology
toxicity, Raman Spectrosocpy
02 engineering and technology
010501 environmental sciences
Photochemistry
01 natural sciences
Fluorescence spectroscopy
Cell Line
Electron transfer
Humans
General Materials Science
Viability assay
Graphite
Particle Size
defects
0105 earth and related environmental sciences
BIO/06 - ANATOMIA COMPARATA E CITOLOGIA
chemistry.chemical_classification
Reactive oxygen species
oxidative stre
Air Pollutants
Spin trapping
Cell-Free System
spin trapping
ROS
021001 nanoscience & nanotechnology
Materials Science (all)
BIO/10 - BIOCHIMICA
chemistry
graphite particle
Particulate Matter
Particle size
EPR
0210 nano-technology
Reactive Oxygen Species
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....119d5d048331466a8a4346550e7a84a5