Review Article

Current Studies into the Genotoxic Effects of Nanomaterials

Table 2

Selected in vitro genotoxicity studies on NMs.

Type of NPSize and formExperimental design/genotoxic testsSummary of findingsReferences

Carbons

C600.92 m2/g surface areaAmes testNo mutagenic response,
and no incidence of chromosomal aberration
Shinohara et al.; 2009 [17]

C60polyhydroxylatedCHO-K1 cells
chromosome aberration assay
CBMN test
No genotoxicity at all doses (11–221 πœ‡ M)MrdanoviΔ‡ et al., 2009 [24]

C60nanospheresMouse primary embryo fibroblasts
Dihydrorhodamine 123 radical probe
Increased mutation yield and induces kilo-based pair deletion mutations in transgenic mouse cells.
Dose-dependent formation of ONOO-
Xu et al.; 2009 [25]

SWCNT
-MWSCNT
nanotubesHuman lymphocytes in culture CBMN test
Sister Chromatid Exchange (SCE) assay
No genotoxicity effects but SWCNT induces mitotic inhibitionSzendi and Varga; 2008 [19]

MWSCNTagglomeratesV79 cells treated for 18 h and 30 h at 2.5, 5 and 10 πœ‡ g/mL.
Chromosome aberration test Ames test
No mutagenic or clastogenic effectsWirnitzer et al., 2009 [26]

MWSCNTnanotubesAmes test on Salmonella typhimurium TA 98 and TA 100 strains, and on Escherichia coli WP2uvrA strain, in presence and in absence of the metabolic activation system S9No mutagenic effectsDi Sotto et al.; 2009, [27]

C60
SWCNT
Carbon black
(CB)
0.7 nm (C60) 0.9–1.7 nm (SWCNT) 14 nm (CB)FE1-muta trademark mouse lung epithelial cell line comet assay
FE1-MML mutagenicity analysis
c11 mutation analysis
No cell death. Slower proliferation and cell-cycle arrest at G1 with SWCNT.
Mutant frequency unaffected by 576 h exposure
Jacobsen et al., 2008 [28]

Metals

Alumina
( A l 2 O 3 )
Cobalt
Chromium
alloy (CoCr)
bareHuman primary fibroblasts over 5 days
CBMN assay
gamma-H2AX immuno staining
cytogenetic analysis (FISH)
At 24 h, A l 2 O 3 increase micronucleus binucleated cells, chromosomal loss, gain, and polyploidy.
At 24 h, CoCr induce dose-dependent increase in micronucleus binucleated cells, chromosomal loss, gain, deletions, and polyploidy.
Tsaousi et al.; 2010, [29]

Co20 nm
500 nm
Balb/3T3 cells at 1–100 πœ‡ M dose concentrations.
CBMN test
Comet assay
Significant results for CBMN and comet assay but no dose-dependency.
Increase of type III foci
Ponti et al.; 2009 [30]

Co100–500 nmPeripheral blood leulocytes at 24, 48 h timepoints in 10βˆ’5M and 10βˆ’4M dose concentrations
CBMN test
Comet assay
Induces DNA damage
Genotoxic effects
modulated by donor
characteristics and/or Co2+ release.
Colognato et al.; 2008 [31]

A l 2 O 3
T i O 2
nanoparticlesCHO-K1 cells
Micronucleus (MN) test
Sister chromatid exchange (SCE)
MN frequencies increase at 0.5 and 1 πœ‡ g/mL TiO2 and 0.5–10 πœ‡ g/mL AL2O3.
SCE higher at 1–5 πœ‡ g/mL TiO2 treatment, and at 1–25 πœ‡ g/mL A l 2 O 3
Di Virgillio et al.; 2010 [32]

T i O 2 rutile/anatase
fine rutile
Human bronchial epithelial cells (BEAS 2B) with 1–100 πœ‡ g/cm2 at 24, 48, and 72 h.
Comet assay
MN test
Both induce DNA damage at all treatment times. Only nanosize rutile increase frequency of MN cells at 10, 60 πœ‡ g/cm2, 72 h.Falck et al.; 2009 [33]

T i O 2 with p,pβ€²-DDTHuman embryo L-02 hepatocyte 0.01, 0.1, 1 πœ‡ g/mL treatment concentrations
Flow cytometry with DCFH-DA probe
8OHdG analysis
Comet assay
MN test
T i O 2 enhances
photocatalysis. Increases oxidative stress, DNA adducts, DNA strand breaks, and chromosome damage
Shi et al.; 2010 [34]

T i O 2 2–30 nm (mean at 15 nm)NIH3T3 human fibroblasts HFW cells
Short-term treatment at 24, 48 and 72 h.
Long-term treatment, cell passage every 3 days with NP media.
Flow cytometry with H2DCFDA probes
Short-term increased cell survival and growth. Long-term G2/M delay and slower cell-division with aberrant multipolar spreads. Overall disturbance in cell-cycle progression, duplicate
genome segregation, and
chromosomal instability
Huang et al.; 2009 [35]
Cell-cycle analysis
Cell-division analysis
Confocal microscopy

T i O 2
F e 2 O 3
anatase <100 nm
<100 nm
Human lung fibroblasts IMR-90 and BEAS-2B cells
Electron paramagnetic resonance (EPR)
8-OHdG analysis
T i O 2 treatment showed no DNA breakage, DNA adduct nor free radical generation. F e 2 O 3 had significant DNA damage after 24 h in IMR-90 cellsBhattacharya et al.; 2009 [36]

T i O 2 nanoparticles
rutile
anatase
Mouse primary embryo fibroblasts
Dihydrorhodamine 123 radical probe
Increased mutation yield and induces kilo-based pair deletion mutations in transgenic mouse cells. Dose-dependent formation of ONOO-Xu et al.; 2009 [25]

T i O 2 100 nmHuman lymphoblastoid cells. Treatment with 26, 65, 130 πœ‡ g/mL at 6, 24, 48 h.
CBMN test
Comet assay
Hypoxanthine-guanine
phosphoribosyltransferase (HPRT) gene mutation assay
130 πœ‡ g/mL treatment increases MNBC frequency 2-3 folds and 2.5 fold in mutation frequency.
65 πœ‡ g/mL treatment induce 5 fold increase in comet tail moments
Wang et al.; 2007 [37]

ZnOnanospheresHuman epidermal cell line (A431)
Treatment at 0.8, 0.008g/mL Comet assay
Significant DNA damage in comet assay. Induces oxidative stressSharma et al.; 2009 [38]

Ag30 nm, nanospheresMedaka fish cell lines
Treatment at 0.05, 0.1, 0.3 πœ‡ g/cm2
Chromosomal aberration and aneuploidyWise et al.; 2010 [39]

Ag6–20 nmstarch coatedIMR-90 and human glioblastoma cells U251
Comet assay
CBMN
Annexin V propidium iodide
staining
DNA aberrations more prominent in cancer cells with more chromosomal aberrations.Asharani et al.; 2009 [40]

Ag25 nm
polysaccharide
surface functionalized and
uncoated nanospheres
Mouse embryonic stem cells and embryonic fibroblasts Immuno blot ImmunoflorescenceUpregulation of p53, Rad 51 and phosphorylated H2AX protein expression. Coated AgNP show more severe damage than uncoated AgNPAhamed et al.; 2008 [41]

Au20 nm
Serum coated
Human fetal lung fibroblasts cells (MRC-5) treated with nAu at 0,
0.5 and 1 nm concentrations.
8-OHdG analysis
Significant DNA damage in 1 nm treatment compared to control.Li et al.; 2008 [42]

Platinum (Pt NP)5–8 nm capped with poly-vinyl alcoholHuman cell linep53 activation, p21 downregulation. Increase of DNA damage, arrest at cell-cycle S phase and apoptosisAsharani et al.; 2010 [43]

Other Nanomaterials

Nanoceria (CeO2)nanoparticlesHuman lens epithelial cells at 5, 10 πœ‡ g/mL concentrations
SCE
Comet assay (alkaline)
No DNA damage nor SCEPierscionek et al.; 2010 [44]

Polymer NPlyophilized PELGE and PLGAnpCHO cells
MN test
SCE
No significant difference in MN assay and no cell-cycle delay. SCE found to be higher in 5 kinds of PELGE-NP than in negative controlsHe et al.; 2009 [45]