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Issue 48, 2007
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Mechanism of cell death induced by magnetic hyperthermia with nanoparticles of γ-MnxFe2–xO3 synthesized by a single step process

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Abstract

Magnetic nanoparticles of γ-MnxFe2–xO3 (0 ≤ x ≤ 1.3) have been synthesized successfully using a single step process wherein the respective inorganic salts were thermally decomposed in ethylene glycol at 200 °C. Single phase formation is evident in the as prepared dried samples without any further treatment. XRD line broadening along with TEM suggest that the particle size is below 30 nm. Both the magnetic and XRD data support the substitution of Mn3+ ions at the tetrahedral site of γ-Fe2O3. Improved magnetization value (78 emu g–1) is obtained for the sample with x = 0.2 compared to one with x = 0 (62 emu g–1) if measured at 20 kOe. Aqueous suspensions of the sample with x = 0.2 were prepared using a polymer, Acrypol 934, with an aim to examine the possible use of these suspensions in the magnetic hyperthermia treatment of cancer. These suspensions were found to be biocompatible at concentration as high as 3.75 mg mL–1 of culture media. Hyperthermia induced by the application of an AC magnetic field in the presence of the above suspension caused HeLa cell death. The cell death was found to be proportional to the quantity of the particles and the duration of application of the AC magnetic field. Following hyperthermia treatment, cells showed varying degrees of membrane blebbing with significant disruption of the actin and tubulin cytoskeletons. The apparent disruption of the actin and microtubule cytoskeletons of cells might be responsible for the death of cells following hyperthermia treatment. These observations suggest that the suspension of these particles may be evaluated for magnetic hyperthermia treatment of cancer.

Graphical abstract: Mechanism of cell death induced by magnetic hyperthermia with nanoparticles of γ-MnxFe2–xO3 synthesized by a single step process

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Publication details

The article was received on 30 May 2007, accepted on 28 Sep 2007 and first published on 12 Oct 2007


Article type: Paper
DOI: 10.1039/B708156A
Citation: J. Mater. Chem., 2007,17, 5042-5051
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    Mechanism of cell death induced by magnetic hyperthermia with nanoparticles of γ-MnxFe2–xO3 synthesized by a single step process

    N. K. Prasad, K. Rathinasamy, D. Panda and D. Bahadur, J. Mater. Chem., 2007, 17, 5042
    DOI: 10.1039/B708156A

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