Self-assembling chitosan/poly-γ-glutamic acid nanoparticles for targeted drug delivery

Zsolt Keresztessy, Magdolna Bodnár, Elizabeth Ber, István Hajdu, Min Zhang, John F. Hartmann, Tamara Minko, J. Borbély

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

For the purpose of targeted drug delivery, composite biodegradable nanoparticles were prepared from chitosan and the poly-γ-glutamic acid via an ionotropic gelation process. These stable self-assembled nanoparticles were characterized by dynamic light scattering, transmission electron microscopy, and atomic force microscopy, which demonstrated that the nanosystem consists of spherical particles with a smooth surface both in aqueous environment and in dried state. Toxicity measurements showed that the composition is nontoxic when tested either on cell cultures or in animal feeding experiments. To evaluate the potential of the nanosystem for intracellular drug delivery, the nanoparticles were fluorescently labeled and folic acid was attached as a cancer cell-specific targeting moiety. The ability of the particles to be internalized was tested using confocal microscopic imaging on cultured A2780/AD ovarian cancer cells, which overexpress folate receptors. The quantitative data obtained by digital processing of the intensity of green color of each pixel in the pictures inside the cell boundaries and total intensity of fluorescence inside the cells showed that "targeted" particles internalized into the cells significantly faster and the total accumulation of these particles was substantially higher in the cancer cells when compared with "nontargeted" particles, which may facilitate effective and specific cytoplasmic delivery of anticancer agents loaded into such nanoparticles.

Original languageEnglish
Pages (from-to)759-765
Number of pages7
JournalColloid & Polymer Science
Volume287
Issue number7
DOIs
Publication statusPublished - 2009

Fingerprint

glutamic acid
Chitosan
assembling
Glutamic Acid
delivery
drugs
Nanoparticles
Nanosystems
nanoparticles
Acids
Cells
Folic Acid
cancer
Ionotropic gelation
cells
folic acid
Dynamic light scattering
Digital signal processing
Drug delivery
Cell culture

Keywords

  • Cellular uptake
  • Chitosan
  • Cytotoxicity
  • In vivo toxicity
  • Nanoparticles
  • PGA
  • Poly-γ-glutamic acid

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry
  • Colloid and Surface Chemistry

Cite this

Self-assembling chitosan/poly-γ-glutamic acid nanoparticles for targeted drug delivery. / Keresztessy, Zsolt; Bodnár, Magdolna; Ber, Elizabeth; Hajdu, István; Zhang, Min; Hartmann, John F.; Minko, Tamara; Borbély, J.

In: Colloid & Polymer Science, Vol. 287, No. 7, 2009, p. 759-765.

Research output: Contribution to journalArticle

Keresztessy, Z, Bodnár, M, Ber, E, Hajdu, I, Zhang, M, Hartmann, JF, Minko, T & Borbély, J 2009, 'Self-assembling chitosan/poly-γ-glutamic acid nanoparticles for targeted drug delivery', Colloid & Polymer Science, vol. 287, no. 7, pp. 759-765. https://doi.org/10.1007/s00396-009-2022-3
Keresztessy, Zsolt ; Bodnár, Magdolna ; Ber, Elizabeth ; Hajdu, István ; Zhang, Min ; Hartmann, John F. ; Minko, Tamara ; Borbély, J. / Self-assembling chitosan/poly-γ-glutamic acid nanoparticles for targeted drug delivery. In: Colloid & Polymer Science. 2009 ; Vol. 287, No. 7. pp. 759-765.
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