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Preparation of Lysine-Coated Magnetic Fe2O3 Nanoparticles and Influence on Viability of A549 Lung Cancer Cells

  • Ma, Yu-Hua (Department of Clinical Laboratory Medicine, Linyi People's Hospital) ;
  • Peng, Hai-Ying (Department of Clinical Laboratory Medicine, Linyi People's Hospital) ;
  • Yang, Rui-Xia (Department of Laboratory Medicine, The First Affiliated Hospital of Nanjing Medical University) ;
  • Ni, Fang (Department of Laboratory Medicine, The First Affiliated Hospital of Nanjing Medical University)
  • Published : 2014.11.06

Abstract

Objective: To explore the effect of lysine-coated oxide magnetic nanoparticles (Lys@MNPs) on viability and apoptosis of A549 lung cancer cells. Methods: Transmission electron microscopy (TEM), vibrating sample magnetometer (VSM) and Zeta potentiometric analyzer were employed to characterize Lys@MNPs. Then Lys@MNPs and lung cancer A549 cells were co-cultured to study the effect of Lys@MNPs on cell viability and apoptosis. The pathway of Lys@MNPs entering A549 cells was detected by TEM and cell imaging by 1.5 T MRI. Results: Lys@MNPs were 10.2 nm in grain diameter, characterized by small size, positive charge, and superparamagnetism. Under low-dose concentration of Lys@MNPs (< $40{\mu}g/mL$), the survival rate of A549 cells was decreased but remained higher than 95% while under high-dose concentration ($100{\mu}g/mL$), the survival ratewas still higher than 80%, which suggested Lys@MNPs had limited influence on the viability of A549 cells, with good biocompatibility and and no induction of apoptosis. Moreover, high affinity for cytomembranes, was demonstrated presenting good imaging effects. Conclusion: Lys@MNPs can be regarded as a good MRI negative contrast agents, with promising prospects in biomedicine.

Keywords

Oxide magnetic nanoparticle;lysine;lung cancer cells;magnetic resonance imaging;cell viability

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