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A nanoencapsulated hypocrellin A prepared by an improved microemulsion method for photodynamic treatment

  • Lin Zhou
  • Yu-Wei Ning
  • Shao-Hua Wei
  • Yu-Ying Feng
  • Jia-Hong Zhou
  • Bo-Yang Yu
  • Jian Shen
Article

Abstract

A new hypocrellin A (HA) encapsulated silica nanoparticles was prepared by an improved microemulsion method based on the unique character of cetyl trimethyl ammonium bromide (CTAB). Stable aqueous dispersions of the HA-loaded nanoparticles, with the diameter about 50 nm, owned superior photo-stability and singlet oxygen generation ability to free HA. In vitro studies demonstrated the active uptake of HA-doped nanoparticles into the cytosol of HeLa (human cervix epithelioid carcinoma) cells. Significant morphology change and phototoxicity to such impregnated tumor cells was observed upon irradiation with light. Thus, the potential of using this method to prepare silica nanoparticles as drug carriers for photodynamic therapy has been demonstrated.

Keywords

Singlet Oxygen Silica Nanoparticles Cetyl Trimethyl Ammonium Bromide Cetyl Trimethyl Ammonium Bromide Amino Silane 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This research was supported by the National Natural Science Foundation of China (No. 20603018) and the key laboratory of photochemical conversion and optoelectronic materials, TIPC, CAS.

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Department of Complex Prescription of TCMChina Pharmaceutical UniversityNanjingPeople’s Republic of China
  2. 2.Xuchang Vocational Technical CollegeXuchangPeople’s Republic of China
  3. 3.Jiangsu Key Laboratory Biofunctional Materials, Analysis and Testing CenterNanjing Normal UniversityNanjingPeople’s Republic of China

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