MRS Proceedings

Articles

Functionalized Magnetic Nanoparticles for Selective Targeting of Cells

2009 MRS Fall Meeting.

Wolfgang Tremela1, Mohammed Ibrahim Shukoora2, Filipe Natalioa3, Thomas Schladta4, Matthias Barza5, Muhammad Nawaz Tahira6, Stefan Webera7, Rudolf Zentela8, Laura Maria Schreibera9, Jürgen Briegera10, Heinz Christoph Schrödera11 and Werner Müllera12

a1 shukoor@uni-mainz.de, Universität Mainz, Institut für Anorganische Chemie und Analytische Chemie, Mainz, Germany

a2 natalio@uni-mainz.de, Universität Mainz, Institut für Physiologische Chemie, Mainz, Germany

a3 schladt@uni-mainz.de, Germany

a4 barz@uni-mainz.de, Johannes Gutenberg-Universität Mainz, Institut für Organische Chemie, Mainz, Germany

a5 tahir@uni-mainz.de, Germany

a6 stefanw@uni-mainz.de, Klinikum der Johannes Gutenberg-Universität Mainz, Klinik und Poliklinik für Diagnostische und Interventionelle Radiologie, Mainz, Germany

a7 zentel@uni-mainz.de, Johannes Gutenberg-Universität Mainz, Institut für Organische Chemie, Mainz, Germany

a8 lschreib@uni-mainz.de, Klinikum der Johannes Gutenberg-Universität Mainz, Klinik und Poliklinik für Diagnostische und Interventionelle Radiologie, Mainz, Germany

a9 brieger@hno.klinik.uni-mainz.de, Klinikum der Johannes Gutenberg-Universität Mainz, HNO Klinik, Labor für Tumorbiologie, Mainz, Germany

a10 hschroed@uni-mainz.de, Germany

a11 wmueller@uni-mainz.de, Germany

a12 tremel@uni-mainz.de, Universität Mainz, Institut für Anorganische Chemie und Analytische Chemie, Duesbergweg 10-14, Mainz, 55099, Germany, +49 6131 3925135, +49 6131 3925605

Abstract

Initiation of pathways that lead to proliferation and chemoresistance by Toll-like receptors (TLRs) is an important factor in cancer progression. Here, we show the response of human cancer cells to TLR signaling inevitably linked to tumor biology. The approach is based on tailored multifunctional magnetic nanoparticles equipped with pathogen-derived ligands (CpG) functioning as TLR agonists (molecular component) to investigate the impact of transcription factor immune activation on human cancer cells. Magnetic nanoparticles (MnO and bifunctional Au-MnO) particles were covalently coated with a multifunctional polymer, displaying no cytotoxicity, to being able to enter cells while carrying foreign DNA (unmethylated CpG) to recognize intracellular TLR 9. Both, the particle and the nucleic acid are tagged with fluorescent markers for simultaneous visualization inside the cell. Apart from optical imaging, the magnetism of the particles also allows magnetic resonance imaging of organisms.

(Received November 29 2009)

(Accepted May 04 2010)

Key Words

  • nanoscale;
  • magnetic;
  • biomedical
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