NIOSHTIC-2 Publications Search

Apoptosis induced by tungsten carbide-cobalt nanoparticles in JB6 cells involves ROS generation through both extrinsic and intrinsic apoptosis pathways.

Zhao-J; Bowman-L; Magaye-R; Leonard-SS; Castranova-V; Ding-M

Int J Oncol 2013 Apr; :42(4):1349-1359

http://dx.doi.org/10.3892/ijo.2013.1828

20042450

In this study, apoptosis and related signaling induced by WC-Co nanoparticles were investigated in JB6 cells and rat lung macrophages. Electron spin resonance (ESR) and fluorescent staining indicated that both WC-Co nanoparticles and fine particles stimulated reactive oxygen species (ROS) generation. Catalase exhibited an inhibitory effect on WC-Co nanoparticle-induced ROS as well as mitochondrial membrane permeability damage. Further study indicated that WC-Co nanoparticles elicited higher cytotoxicity and apoptotic induction than fine particles. Western blot analysis showed activation of proapoptotic factors including Fas, Fas-associated protein with death domain (FADD), caspase 3, 8 and 9, BID and BAX. In addition, both cytochrome c and apoptosis-inducing factor (AIF) were upregulated and released from mitochondria to the cytoplasm. Our findings demonstrate that, on a mass basis, WC-Co nanoparticles exhibit higher cytotoxicity and apoptotic induction than fine particles. Apoptosis induced by WC-Co nanoparticles and fine particles involves both extrinsic and intrinsic apoptosis pathways.

Nanotechnology; Animals; Laboratory-animals; Lung; Particulates; Cytotoxicity; Author Keywords: JB6 cells; rat lung macrophages; cytochrome c; apoptosis-inducing factor; mitochondria

Jinshun Zhao, Ningbo Univ, Zhejiang Prov Key Lab Pathol & Physiol Technol, Sch Med, Dept Prevent Med, 818 Fengua Rd, Ningbo 315211, Zhejiang, Peoples R China

IJONES

20130401

Journal Article

zhaojinshun@nbu.edu.cn

2013

B20130502

4

1019-6439

HELD

Construction; Manufacturing

International Journal of Oncology

WV