Nanoparticle formulation for controlled release of capsaicin

Seon Kim, Jong Chul Kim, Donggeun Sul, Sun Wook Hwang, Sang Heon Lee, Young Ha Kim, Giyoong Tae

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


Capsaicin might be an effective pharmacological agent for the treatment of discogenic back pain due to its effect on pain control neuronal degeneration. Therefore, capsaicin-loaded nano-and micro-particles for sustained release were formulated by nano-precipitation or oil-in-water single emulsion solvent evaporation/extraction method. First, the capsaicin-loaded PLGA nanoparticles were prepared by nano-precipitation method. By increasing the volume of oil-water ratio from 1:2 to 1:5, slight changes in size from 162±3 nm to 153±3 nm and in drug loading efficiency from 25% to 20% were observed, whereas the drug release period was significantly changed from 11 days for 1:2 to 5 days for 1:5 ratio. To get a more sustained release, a modified single emulsion method was applied with three kinds of biocompatible polymers (PLLA, PLGA, and PCL). Among them, PLLA particles showed a much sustained release profile than PLGA or PCL ones with the similar size. For PLLA particles, particles size and drug encapsulation efficiency increased as the oil/water ratio decreased, and the bigger particles showed the slower release profiles as well as the higher drugloading efficiency, thus about 1 month release was obtained with 800 nm particles. In conclusion, formulation for the controlled release of capsaicin from 1 week to 1 month was prepared by using biocompatible nanoparticles.

Original languageEnglish
Pages (from-to)4586-4591
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Issue number5
Publication statusPublished - 2011 May


  • Capsaicin
  • Controlled release
  • Nanoparticle
  • PLLA

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • Biomedical Engineering
  • General Materials Science
  • Condensed Matter Physics


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