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Recent Advances and Patents on Solid Lipid Nanoparticles

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Solid Lipid Nanoparticles (SLNs) have attracted increasing scientific and commercial attention as colloidal drug carriers during the last decade. They have emerged as a potential alternative compared to other colloidal systems like polymeric nanoparticles, liposomes and fat emulsions, as they have been claimed to combine their advantages but successfully overcome their drawbacks. SLN formulations are extensively developed and characterized for their in vitro and in vivo applications by various routes like parenteral, oral, pulmonary, ocular, and dermal. SLNs are being widely investigated as carriers for delivery of macromolecules like proteins, oligonucleotides and DNA. SLNs have already been taken up for medium and large scale production using two of its reported production methods. In fact, the first SLN based product has recently been introduced in the Poland market as a topically applied moisturizer. Newer methods for production of SLNs and their applications are being reported and patented. Nanostructured lipid carriers (NLC) are mixture of solid lipid and liquid lipid while Lipid Drug Conjugates (LDC) are water insoluble lipid carrier for loading of poorly lipid soluble drugs. These new generation of lipid nanoparticles have been claimed to overcome the shortcomings of SLNs.

This article reviews the formulation, characterization, applications, and patents on the advances and research on SLNs, NLC and LDC.

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Keywords: Solid lipid nanoparticles; lipid drug conjugates; nanostructured lipid carriers; patents on solid lipid nanoparticles; proteins and peptide delivery; special applications of lipid nanoparticles

Document Type: Research Article

Publication date: 2008-06-01

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  • Recent Patents on Drug Delivery and Formulation publishes review articles by experts on recent patents on drug delivery and formulation. A selection of important and recent patents on drug delivery and formulation is also included in the journal. The journal is essential reading for all researchers involved in the fields of drug delivery and formulation.
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