| چکیده انگلیسی مقاله |
Introduction: Metal nanoparticles exhibit a broad range of properties and have made substantial contributions to the field of biomedicine, particularly concerning targeted drug delivery systems. These nanoparticles function effectively as carriers for a variety of therapeutic agents, including but not limited to antibodies, nucleic acids, chemotherapeutic agents, and peptides. Metals such as silver, gold, zinc, copper, and cerium display remarkable optical characteristics that augment their functional capabilities. Furthermore, their surfaces can be readily modified via hydrogen bonding, covalent bonding, or electrostatic interactions, facilitating their application with bioactive molecules for specific targeting endeavors. The advancement of numerous nanomedicines aimed at tumor treatment has underscored the potential of cerium oxide nanoparticles (CONPs) as a viable therapeutic agent in oncological therapy. Empirical studies suggest that CONPs possess cytotoxic properties against neoplastic cells, inhibit their invasiveness, and enhance their susceptibility to radiation and chemotherapeutic interventions. Additionally, CONPs exhibit minimal toxicity to healthy tissues and contribute to the reduction of reactive oxygen species (ROS) production. Xanthium strumarium, despite its high toxicity, is acknowledged for its medicinal properties. All constituents of the plant contain toxic compounds in varying concentrations and are utilized in the treatment of various ailments, including malaria, cancer, rheumatism, arthritis, tuberculosis, and respiratory allergies, in addition to their analgesic effects. Its roots, fruits, leaves, and other aerial parts possess significant medicinal value. The technique of green synthesis, which employs natural extracts, is utilized for the production of metal or metal oxide nanoparticles.
Aim:The objective of this research is to examine the impact of cerium oxide nanoparticles synthesized through sol-gel and green synthesis techniques utilizing Xanthium strumarium extract on MDA-MB-231 cancer cells.
Materials and Methods: For the green synthesis approach, Zardineh plants, specifically Xanthium classified under the strumarium category with the ALUH 38785 code, were collected from regions adjacent to the Alborz mountains. The leaves of the plant were separated and ground into a fine powder. The resulting powder was extracted and purified using a reflux method. This extract served as a reducing agent for cerium nitrate metal ions. In the sol-gel method, cerium nitrate and cetyltrimethylammonium bromide were used. Characterization of the nanoparticles was conducted using FTIR, EDAX, SEM, and AFM techniques. Furthermore, the MTT assay was used to assess and compare the cytotoxic effects of cerium oxide nanoparticles synthesized on MDA-MB-231 cancerous cells.
Results: AFM analysis indicated that the size of the green synthesized nanoparticles was 10 and Sol-gel method nanoparticles were 13 nm. SEM and EDAX analysis revealed that the synthesized cerium nanoparticles exhibited a nearly spherical shape, with those produced via the sol-gel method showing uniform accumulation and dispersion. The MTT assay results demonstrated that the cytotoxic effect of cerium oxide nanoparticles synthesized on MDA-MB-231 cancerous cells increased with both time and concentration. Notably, the lethal effect of nanoparticles synthesized through the green method was found to be more pronounced than nanoparticles produced via the sol-gel method.
Conclusion: Cerium oxide nanoparticles (CONPs) exert toxicity in cancerous cells, inhibit invasion, and enhance the sensitivity of cancerous cells to radiotherapy and chemotherapy. The green synthesis method uses biological extracts, such as plant materials, in place of industrial chemical agents to reduce metal ions and generate valuable nanoparticles. This approach offers several advantages over traditional chemical synthesis, including cost-effectiveness, reduced environmental pollution, and improved safety for both the environment and human health. |