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2019/02/18
Toxicological Evaluation of SiO2 Nanoparticles by Zebrafish Embryo Toxicity Test

2018/12/27
Increased susceptibility to oxidative stress-induced toxicological evaluation by genetically modified nrf2a-deficient zebrafish.

2018/01/18
EGF receptor kinase suppresses ciliogenesis through activation of USP8 deubiquitinase

2017/11/23
Chemokines protect vascular smooth muscle cells from cell death induced by cyclic mechanical stretch.

2017/07/29
New photic stimulating system with white light-emitting diodes to elicit electroretinograms from zebrafish larvae.

tCopper Oxide Nanoparticles Reduce Vasculogenesis in Transgenic Zebrafish Through Down-Regulation of Vascular Endothelial Growth Factor Expression and Induction of Apoptosis

                     
2015/03/01

Journal of Nanoscience and Nanotechnology, Volume 15, Number 3, March 2015, pp. 2140-2147(8)

Copper Oxide Nanoparticles Reduce Vasculogenesis in Transgenic Zebrafish Through Down-Regulation of Vascular Endothelial Growth Factor Expression and Induction of Apoptosis

Chang, Jie; Ichihara, Gaku; Shimada, Yasuhito; Tada-Oikawa, Saeko; Kuroyanagi, Junya; Zhang, Beibei; Suzuki, Yuka; Sehsah, Radwa; Kato, Masashi; Tanaka, Toshio; Ichihara, Sahoko

Abstract:
The present study investigated the effects of exposure to metal oxide nanoparticles on vasculogenesis/angiogenesis using transgenic zebrafish. The study also examined the potential mechanisms involved in those effects using human umbilical vein endothelial cells (HUVEC). TG (nacre/fli1:EGFP) zebrafish were exposed to nano-sized titanium dioxide (TiO2), silica dioxide (SiO2), and copper oxide (CuO) particles at 0.01, 1 and 100 ƒΚg/ml concentrations from 1 to 5 dpf (day-post-fertilization). Angiogenesis was evaluated morphologically at the end of exposure. Exposure to CuO nanoparticles reduced the number of transversely-running subintestinal vessels in TG zebrafish. Exposure to CuO nanoparticles down-regulated the expression of vascular endothelial growth factor (VEGF) and VEGF receptor in endothelial cells sorted by Fluorescence Activated Cell Sorter (FACS). Exposure of HUVEC to CuO nanoparticles reduced cell viability and increased apoptotic index in a dose-dependent manner. The results suggested that CuO nanoparticles inhibit vasculogenesis through reduction of VEGF expression and induction of apoptosis.

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Journal of Nanoscience and Nanotechnology