Selective killing of cancer cells by iron oxide nanoparticles mediated through reactive oxygen species via p53 pathway
Source abstract
Abstract
Iron oxide (Fe3O4) nanoparticles (NPs) are increasingly recognized for their utility in biomedical applications. However, little is known about the anticancer activity of Fe3O4 NPs. This study was designed to investigate whether Fe3O4 NPs induced toxicity in a cell-specific manner and determine the possible mechanisms of toxicity caused by Fe3O4 NPs in cancer cells. Fe3O4 NPs used in this study were synthesized by green method using α-d-glucose as a reducing agent. Prepared Fe3O4 NPs were spherical in shape with a smooth surface, were fairly distributed, and had an average diameter of 23 nm. Cytotoxicity of Fe3O4 NPs was examined against two types of cancer cells (human hepatocellular carcinoma HepG2 and human lung adenocarcinoma A549) and two normal cells (human lung fibroblast IMR-90 and rat hepatocytes). Fe3O4 NPs exerted distinct effects on cell viability via killing of cancer cells while posing no toxicity on normal cells. Fe3O4 NPs were found to induce depletion of glutathione and induction of reactive oxygen species (ROS) in both types of cancer cells (HepG2 and A549). Further, co-exposure of ascorbic acid significantly attenuated the Fe3O4 NPs-induced oxidative stress. The mRNA levels of tumor suppressor gene p53 and apoptotic genes (caspase-3 and caspase-9) were up-regulated in both types of cancer cells due to Fe3O4 NPs exposure. Protein level of p53, along with the higher activity of caspase-3 and caspase-9 enzymes, was also up-regulated by Fe3O4 NPs. Taken together, our data demonstrated that Fe3O4 NPs selectively induced apoptosis in cancer cells (HepG2 and A549) through up-regulation of p53 that might be mediated by ROS through which most of the anticancer drugs trigger apoptosis. The present study warrants further investigation on anticancer activity of Fe3O4 NPs in relevant animal models.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Nanoparticles: synthesis and applications · Vitamin C and Antioxidants Research · Nanoparticle-Based Drug Delivery
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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