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Interaction of cancer cells with magnetic nanoparticles modified by methacrylamido-folic acid

Authors Nagehan Saltan, H Mehtap Kutlu, Deniz Hür

Published 28 February 2011 Volume 2011:6 Pages 477—484

DOI https://doi.org/10.2147/IJN.S16803

Review by Single-blind

Peer reviewer comments 4

Nagehan Saltan1, H Mehtap Kutlu2, Deniz Hür3,4, Arzu İşcan4, Ridvan Say3
1Department of Pharmaceutical Botanics, Faculty of Pharmacy, 2Department of Biology, 3Department of Chemistry, Faculty of Science, 4Plant, Drug and Scientific Research Center Anadolu University, Eskişehir, Turkey

Background: Magnetic nanoparticles show great promise for use as tools in a wide variety of biomedical applications. The purpose of this study was to investigate the potential effects of methacrylamido-folic acid (Ma-Fol)-modified magnetic nanoparticles on 5RP7 (H-ras-transformed rat embryonic fibroblasts) and NIH/3T3 (normal mouse embryonic fibroblasts).
Methods: The cytotoxicity and viability of 5RP7 and NIH/3T3 cells were detected. The percentage of cells undergoing apoptosis was analyzed by flow cytometry using Annexin V-fluorescein isothiocyanate staining. Nanoparticle internalization into 5RP7 and NIH/3T3 cells was visualized by transmission electron microscopy.
Conclusion: In this study, folic acid coupled to the surface of iron oxide for selective binding to cancer cells and immobilized the surfaces of magnetic nanoparticles. This complex improves cell internalization and targeting of cancer cells. We detected increased apoptosis using flow cytometry and transmission electron microscopy.
Results: Folic acid modification of magnetic nanoparticles could be used to facilitate uptake to specific cancer cells for cancer therapy and diagnosis. Our results showed that the uptake of folic-acid modified nanoparticles by 5RP7 cancer cells was also much higher than that of 3T3 cells. This modification can be used for successful targeting of cancer cells expressing the folate receptor.

Keywords: folic acid, apoptosis, nanoparticles, transmission electron microscopy

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