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• W2073535433 abstract "ObjectiveChondrocyte apoptosis represents an important component in the osteoarthritis (OA) pathogenesis. This study sought to investigate the potential of polychlorinated biphenyl (PCB)126, the most potent and ubiquitous environmental pollutant of PCB congeners, on chondrocyte apoptosis and its mechanism of action.MethodsRabbit articular chondrocytes cultured from tibial and femoral in cartilage were exposed to PCB126. Productions of reactive oxygen species (ROS) and nitric oxide (NO) and nuclear factor-kB (NF-kB) binding activity were measured. After 24 h exposure to PCB126, the apoptotic cell death was detected by caspase-3 activity, enzyme-linked immunosorbent assay (ELISA) using antibodies against DNA and histone, and terminal deoxynucleotidyl transferase (TdT)-mediated dUTP-biotin nick end-labeling (TUNEL) staining.ResultsPCB126 generated ROS, which was blocked by the antioxidants (N-acetylcystein and trolox), or the aryl hydrocarbon receptor (AhR) inhibitor, α-naphthoflavone (α-NF). PCB126 exposure also increased NO production and NF-kB binding activity in the chondrocytes, which were blocked by the iNOS inhibitor, N-monomethyl-l-arginine (l-NMMA). All apoptosis detection techniques used in this study revealed an increase of apoptotic effects by PCB126 exposure, which was blocked by inhibitors of ROS or iNOS. This is the first report to demonstrate the potential of a PCB congener to induce chondrocytes apoptosis, which could be an initial process in cartilage degradation.ConclusionsPCB may be an initiator of chondrocyte apoptosis, which is closely linked to degradation of cartilage in OA pathogenesis. This study may contribute to identifying the possible causes of arthritis in our environment." @default.
• W2073535433 created "2016-06-24" @default.
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• W2073535433 date "2012-10-01" @default.
• W2073535433 modified "2023-09-25" @default.
• W2073535433 title "PCB126 induces apoptosis of chondrocytes via ROS-dependent pathways" @default.
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• W2073535433 doi "https://doi.org/10.1016/j.joca.2012.06.004" @default.
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