METHOD FOR THE PREPARATION OF BIOCOMPATIBLE POLYMERIC NANOPARTICLES FOR DRUG DELIVERY AND NANOPARTICLES PREPARED THEREBY
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United States of America Patent
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Issued Date -
Dec 2, 2010
app pub date -
Apr 22, 2008
filing date -
Apr 27, 2007
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Abandoned
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Abstract
Disclosed are biocompatible polymeric nanoparticles for drug delivery and a method for preparing the same. They can be prepared by mixing a tri-block copolymer, PEG, and a drug at a predetermined temperature to give a homogeneous polymeric mixture; solidifying the homogeneous polymeric mixture at room temperature; and dissolving the solidified polymeric mixture in an aqueous solution. Based on a polymer melting process, the method makes it easy to produce poloxamer nanoparticles at low cost. The nanoparticles show desired particle sizes suitable for use in drug delivery and a uniform particle size distribution. Consisting of a bilayer structure, the nanoparticles can contain sparingly soluble drugs. Also, the nanoparticles contain no organic solvents and are thus safe to the body because they are free of organic solvent residuals. Further, after being administered into the body, the nanoparticles with a high content of sparingly soluble drug entrapped therein can safely deliver the drug to target sites and stably release the drug at a controlled rate.
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