Nanoparticle Formulation for Controlled Release of Capsaicin

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

Source: Journal of Nanoscience and Nanotechnology, Volume 11, Number 5, May 2011 , pp. 4586-4591(6)

Publisher: American Scientific Publishers

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Abstract:

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 drug-loading 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.

Keywords: CAPSAICIN; CONTROLLED RELEASE; PLLA; NANOPARTICLE

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2011.3636

Publication date: 2011-05-01

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Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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Nanoparticle Formulation for Controlled Release of Capsaicin

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