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Research Article

Magnetic resonance imaging contrast of iron oxide nanoparticles developed for hyperthermia is dominated by iron content

, , , , , , , , & show all
Pages 192-200 | Received 16 Dec 2013, Accepted 06 Apr 2014, Published online: 28 Apr 2014

Figures & data

Figure 1. Schematic depiction of the experimental design.

Figure 1. Schematic depiction of the experimental design.

Figure 2. Comparison of amplitude-dependent SLP across peak-to-peak field amplitude spectrum among tested nanoparticle formulations. SLP values for Feridex were obtained from Bordelon et al. [Citation6], and are provided for comparison. Error bars represent standard deviation of the mean calculated from three measurements. AMF frequency was 155 ± 10 kHz.

Figure 2. Comparison of amplitude-dependent SLP across peak-to-peak field amplitude spectrum among tested nanoparticle formulations. SLP values for Feridex were obtained from Bordelon et al. [Citation6], and are provided for comparison. Error bars represent standard deviation of the mean calculated from three measurements. AMF frequency was 155 ± 10 kHz.

Table I. Physical parameters of MNPs used in the current study.

Figure 3. Prussian blue stained slides of nanoparticle loaded DU-145 cells. Images were obtained after 24 h incubation with (A) D-SPIO, (B) JHU, (C) Feridex, and (D) BNF.

Figure 3. Prussian blue stained slides of nanoparticle loaded DU-145 cells. Images were obtained after 24 h incubation with (A) D-SPIO, (B) JHU, (C) Feridex, and (D) BNF.

Figure 4. Survival fraction of DU-145 cells at 100 pg Fe/cell loading. Cells were incubated 24 h with various nanoparticle formulations.

Figure 4. Survival fraction of DU-145 cells at 100 pg Fe/cell loading. Cells were incubated 24 h with various nanoparticle formulations.

Figure 5. Analysis of DU-145 cell-NP loaded iron concentration using ICP-MS. Aliquots ranged from 5 × 105 to 1.1 × 106 cells. Absolute iron concentration was calculated based on known cell number (pg Fe/cell).

Figure 5. Analysis of DU-145 cell-NP loaded iron concentration using ICP-MS. Aliquots ranged from 5 × 105 to 1.1 × 106 cells. Absolute iron concentration was calculated based on known cell number (pg Fe/cell).

Figure 6. T2 relaxation rates (R2) of DU-145 nanoparticle loaded cells as a function of (A) cell number and (B) total iron concentration.

Figure 6. T2 relaxation rates (R2) of DU-145 nanoparticle loaded cells as a function of (A) cell number and (B) total iron concentration.

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