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Ovarian dysfunction and gene-expressed characteristics of female mice caused by long-term exposure to titanium dioxide nanoparticles

Authors :
Gao, Guodong
Ze, Yuguan
Li, Bing
Zhao, Xiaoyang
Zhang, Ting
Sheng, Lei
Hu, Ringhu
Gui, Suxin
Sang, Xuezi
Sun, Qingqing
Cheng, Jie
Cheng, Zhe
Wang, Ling
Tang, Meng
Hong, Fashui
Source :
Journal of Hazardous Materials. Dec2012, Vol. 243, p19-27. 9p.
Publication Year :
2012

Abstract

Abstract: Although numerous studies have described the accumulation of titanium dioxide nanoparticles (TiO2 NPs) in the liver, kidneys, lung, spleen, and brain, and the corresponding damage, it is unclear whether or not TiO2 NPs can be translocated to the ovary and cause ovarian injury, thus impairing fertility. In the current study, ovarian injury and gene-expressed characteristics in female mice induced by intragastric administration of TiO2 NPs (10mg/kg) for 90 consecutive days were investigated. Our findings indicated that TiO2 NPs can accumulate in the ovary and result in ovarian damage, cause an imbalance of mineral element distribution and sex hormones, decrease fertility or the pregnancy rate and oxidative stress in mice. Microarray analysis showed that in ovaries from mice treated with TiO2 NPs compared to controls, 223 genes of known function were up-regulated, while 65 ovarian genes were down-regulated. The increased expression of Cyp17a1 following TiO2 NPs treatment suggested that the increase in estradiol biosynthesis may be a consequence of increased TiO2 NPs. In addition, the elevated expression of Akr1c18 implied that progesterone metabolism was accelerated, thus causing a decrease in the progesterone concentration. Taken together, the apparent regulation of key ovarian genes supports the hypothesis that TiO2 NPs directly affects ovarian function. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
03043894
Volume :
243
Database :
Academic Search Index
Journal :
Journal of Hazardous Materials
Publication Type :
Academic Journal
Accession number :
83933364
Full Text :
https://doi.org/10.1016/j.jhazmat.2012.08.049