Related Experiment Video
Updated: May 20, 2026

Delivery of Therapeutic siRNA to the CNS Using Cationic and Anionic Liposomes
Published on: July 23, 2016
Enhanced delivery of lopinavir to the CNS using Compritol-based solid lipid nanoparticles
Aji Alex1, Willi Paul, A J Chacko
1Department of Pharmaceutical Sciences, Cheruvandoor Campus, Mahatma Gandhi University, Kottayam 686631, India.
Background:
Protease inhibitors such as lopinavir have negligible permeability to the CNS due to blood-brain and blood-cerebrospinal fluid interfaces. An attempt has been made to develop solid lipid nanoparticles to increase the availability of lopinavir in the CNS.
Results/Discussion:
Solid lipid nanoparticle formulations exhibited a Cmax and T(max) of 632.86 +/- 81.61 ng/ml and 25 +/- 7.75 min, respectively, with a significant increase in bioavailability in a rat model compared with a free-drug suspension. An appreciable increase in cerebrospinal fluid concentration was detected with solid lipid nanoparticle formulations.
Conclusion:
Compritol-based solid lipid nanoparticles with a poloxamer coating can be effectively absorbed through the lymphatic system, prolong the circulation of drug in blood by acting as a reservoir and can effectively target the drug to the CNS due to the combined effect of lipophilicity and surface charge. The high biocompatibility, biodegradability and nontoxicity of compritol make the compritol-based solid lipid nanoparticles an excellent carrier for enhanced CNS delivery of lopinavir.
Related Concept Videos
Drug Delivery: Parenteral Route
There are three primary parenteral routes: intravenous (IV), intramuscular (IM), and subcutaneous (SC). The IV route introduces the drug directly into the bloodstream, ensuring immediate action. The IM route...
Modified-Release Drug Delivery Systems: Site-Targeted
Bioavailability Enhancement: Drug Permeability Enhancement
Modified-Release Drug Delivery Systems: Bioavailability
Modified-Release Drug Delivery Systems: Overview
Bioavailability Enhancement: Drug Solubility Enhancement

