Photosensitizer-loaded bubble-generating mineralized nanoparticles for ultrasound imaging and photodynamic therapy

Dong Jin Park, Kyung Hyun Min, Hong Jae Lee, Kwang Meyung Kim, Ick Chan Kwon, Seo Young Jeong, Sang Cheon Lee

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

In this work, we have developed photosensitizer-loaded bubble-generating calcium carbonate (CaCO3)-mineralized nanoparticles that have potential for ultrasound imaging (US)-guided photodynamic therapy (PDT) of tumors. A photosensitizer, chlorin e6 (Ce6)-loaded CaCO3-mineralized nanoparticles (Ce6-BMNs), was prepared using an anionic block copolymer-templated in situ mineralization method. Ce6-BMNs were composed of the Ce6-loaded CaCO3 core and the hydrated poly(ethylene glycol) (PEG) shell. Ce6-BMNs exhibited excellent stability under serum conditions. Ce6-BMNs showed enhanced echogenic US signals at tumoral acid pH by generating carbon dioxide (CO2) bubbles. Ce6-BMNs effectively inhibited Ce6 release at physiological pH (7.4). At a tumoral acidic pH (6.4), Ce6 release was accelerated with CO2 bubble generation due to the dissolution of the CaCO3 mineral core. Upon irradiation of Ce6-BMN-treated MCF-7 breast cancer cells, the cell viability dramatically decreased with increasing Ce6 concentration. The phototoxicity of the Ce6-BMNs was much higher than that of free Ce6. On the basis of tumoral pH-responsive CO2 bubble-generation and simultaneous Ce6 release at the target tumor site, these CaCO3 mineralized nanoparticles can be considered as promising theranostic nanoparticles for US imaging-guided PDT in the field of tumor therapy.

Original languageEnglish
Pages (from-to)1219-1227
Number of pages9
JournalJournal of Materials Chemistry B
Volume4
Issue number7
DOIs
Publication statusPublished - 2016 Feb 21
Externally publishedYes

Fingerprint

Photodynamic therapy
Photosensitizing Agents
Photosensitizers
Photochemotherapy
Nanoparticles
Ultrasonography
Ultrasonics
Imaging techniques
Tumors
Polyethylene glycols
Cells
Calcium carbonate
Block copolymers
Carbon dioxide
Dissolution
Minerals
Irradiation
Acids
chlorin e6
Phototoxic Dermatitis

ASJC Scopus subject areas

  • Biomedical Engineering
  • Medicine(all)
  • Chemistry(all)
  • Materials Science(all)

Cite this

Photosensitizer-loaded bubble-generating mineralized nanoparticles for ultrasound imaging and photodynamic therapy. / Park, Dong Jin; Min, Kyung Hyun; Lee, Hong Jae; Kim, Kwang Meyung; Kwon, Ick Chan; Jeong, Seo Young; Lee, Sang Cheon.

In: Journal of Materials Chemistry B, Vol. 4, No. 7, 21.02.2016, p. 1219-1227.

Research output: Contribution to journalArticle

Park, Dong Jin ; Min, Kyung Hyun ; Lee, Hong Jae ; Kim, Kwang Meyung ; Kwon, Ick Chan ; Jeong, Seo Young ; Lee, Sang Cheon. / Photosensitizer-loaded bubble-generating mineralized nanoparticles for ultrasound imaging and photodynamic therapy. In: Journal of Materials Chemistry B. 2016 ; Vol. 4, No. 7. pp. 1219-1227.
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