Genotoxicity of ferric oxide nanoparticles in Raphanus sativus Deciphering the role

Journal Article

al., Quaiser Saquib et . 2016

• نوع عمل المنشور: KSU Research Work
• رابط المنشور على الويب: Genotoxicity of ferric oxide nanoparticles in Raphanus sativus Deciphering the role of signalling factors
• المجلة \ الصحيفة: Journal of Environmental Sciences
• رقم العدد: Article in press
• رقم الإصدار السنوي: Article in press
• الصفحات: Article in press

مستخلص المنشور

We have studied the genotoxic and apoptotic potential of ferric oxide nanoparticles (Fe2O3-NPs) in Raphanus sativus (radish). Fe2O3-NPs retarded the root length and seed germination in radish. Ultrathin sections of treated roots showed subcellular localization of Fe2O3-NPs, along with the appearance of damaged mitochondria and excessive vacuolization. Flow cytometric analysis of Fe2O3-NPs (1.0 mg/mL) treated groups exhibited 219.5%, 161%, 120.4% and 161.4% increase in intracellular reactive oxygen species (ROS), mitochondrial membrane potential (ΔΨm), nitric oxide (NO) and Ca2+ influx in radish protoplasts. A concentration dependent increase in the antioxidative enzymes glutathione (GSH), catalase (CAT), superoxide dismutase (SOD) and lipid peroxidation (LPO) has been recorded. Comet assay showed a concentration dependent increase in DNA stand breaks in Fe2O3-NPs treated groups. Cell cycle analysis revealed 88.4% of cells in sub-G1 phase apoptotic phase, suggesting cell death in Fe2O3-NPs (2.0 mg/mL) treated group. Taking together, the genotoxicity induced by Fe2O3-NPs highlights the importance of environmental risk associated with improper disposal of nanoparticles (NPs) and radish can serve as a good indicator for measuring the phytotoxicity of NPs grown in NP-polluted environment.