Publication details

Inhalation of ZnO Nanoparticles: Splice Junction Expression and Alternative Splicing in Mice

Authors	RÖSSNER Pavel VRBOVÁ Kristýna STRAPÁČOVÁ Simona ROSSNEROVÁ Andrea AMBROZ Antonin BRZICOVA Tana LIBALOVÁ Helena JAVORKOVÁ Eliška KULICH Pavel VEČEŘA Zbyněk MIKUŠKA Pavel COUFALÍK Pavel KRUMAL Kamil ČAPKA Lukáš DOČEKAL Bohumil MORAVEC Pavel ŠERÝ Omar MÍŠEK Ivan FICTUM Petr FIŠER Karel MACHALA Miroslav TOPINKA Jan
Year of publication	2019
Type	Article in Periodical
Magazine / Source	Toxicological sciences
MU Faculty or unit	Faculty of Science
Citation
Web	http://dx.doi.org/10.1093/toxsci/kfy288
Doi	http://dx.doi.org/10.1093/toxsci/kfy288
Keywords	nanoparticles; mice; inhalation
Description	Despite the wide application of nanomaterials, toxicity studies of nanoparticles (NP) are often limited to in vitro cell models, and the biological impact of NP exposure in mammals has not been thoroughly investigated. Zinc oxide (ZnO) NPs are commonly used in various consumer products. To evaluate the effects of the inhalation of ZnO NP in mice, we studied splice junction expression in the lungs as a proxy to gene expression changes analysis. Female ICR mice were treated with 6.46 * 104 and 1.93 * 106 NP/cm3 for 3 days and 3 months, respectively. An analysis of differential expression and alternative splicing events in 298 targets (splice junctions) of 68 genes involved in the processes relevant to the biological effects of ZnO NP was conducted using next-generation sequencing. Three days of exposure resulted in the upregulation of IL-6 and downregulation of BID, GSR, NF-kB2, PTGS2, SLC11A2, and TXNRD1 splice junction expression; 3 months of exposure increased the expression of splice junctions in ALDH3A1, APAF1, BID, CASP3, DHCR7, GCLC, GCLM, GSR, GSS, EHHADH, FAS, HMOX-1, IFNgamma, NF-kB1, NQO-1, PTGS1, PTGS2, RAD51, RIPK2, SRXN1, TRAF6, and TXNRD1. Alternative splicing of TRAF6 and TXNRD1 was induced after 3 days of exposure to 1.93 * 106 NP/cm3. In summary, we observed changes of splice junction expression in genes involved in oxidative stress, apoptosis, immune response, inflammation, and DNA repair, as well as the induction of alternative splicing in genes associated with oxidative stress and inflammation. Our data indicate the potential negative biological effects of ZnO NP inhalation.