Magnetic chitosan oligomer-sulfonate-stearic acid triple combination as cisplatin carrier for site-specific targeted on MCF-7 cancer cells: Preparation, characterization and in vitro experiments

In this study, a new amphiphilic target-specific adsorbent, chitosan oligomer-sulfonate-stearic acid triple combination (S-Cho-SA), and magnetic chitosan oligomer-sulfonate-stearic acid triple combination (M-S-Cho-SA) by oleic acid (OA)-modified Fe3O4 via hydrophobic interaction are fabricated. By modifying the nanoparticle surfaces and having the ability to magnetically allow the target region, these particles attract attention as important particles used in targeting mechanisms in cancer therapy. With magnetic nanoparticles and an external magnetic field, it is possible to transport therapeutic agents to the target site and keep them in the desired effect zone for a longer period of time. These new adsorbents are characterized by scanning electron microscopy (SEM), attenuated total reflection Fourier transform infrared (ATR FT-IR) spectroscopy, nuclear magnetic resonance (NMR), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), and thermogravimetric analysis (TG/DTA). After chemical characterization, it is complexed with cisplatin (CDDP). The magnetic adsorbents were loaded with high efficiency (>50%), and the release experiments exhibited that cisplatin is released more at pH 4.5 compared with pH 7.4 at 37 degrees C. It showed better drug release results under a magnetic field for magnetic adsorbents (36% for pH 4.5 and 3.6% for pH 7.4). The biocompatibility of the prepared adsorbents was demonstrated via the XTT assay in MCF-7 cell lines. The results also exhibited that S-Cho-SA and M-S-Cho-SA were biocompatible, and free cisplatin and cisplatin-complexed adsorbents showed an antiproliferative effect. The results showed that these new cisplatin-loaded (M-S-Cho-SA) nanoparticles are good candidates for thermotherapy in cancer treatment in the future, as they can provide selectivity by site-specific targeting and hold onto an alternative magnetic field due to the magnetic nature of the nanoparticles.

Automated summary

In this study, new target-specific adsorbents, S-Cho-SA and M-S-Cho-SA, were fabricated by modifying Fe3O4 nanoparticles with oleic acid. These magnetic adsorbents have the potential for selective targeting in cancer therapy due to their ability to transport therapeutic agents to the target site and maintain them there for a longer period of time under an external magnetic field. Characterization techniques including SEM, ATR FT-IR spectroscopy, NMR, XRD, VSM, and TG/DTA were used to analyze the adsorbents. Cisplatin-loaded magnetic adsorbents showed high drug loading efficiency (>50%) and released more drug at pH 4.5 compared to pH 7.4 at 37 degrees C. The biocompatibility of the adsorbents was demonstrated using the XTT assay in MCF-7 cell lines, and the results showed that S-Cho-SA and M-S-Cho-SA were biocompatible and exhibited an antiproliferative effect. These cisplatin-loaded magnetic nanoparticles (M-S-Cho-SA) have the potential to be used in thermotherapy for cancer treatment in the future due to their site-specific targeting and magnetic properties.