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Cationic solid lipid nanoparticles with cholesterol-mediated surface layer for transporting saquinavir to the brain
Yung-Chih Kuo1, Cheng-Chin Wang
1Dept. of Chemical Engineering, National Chung Cheng University, Chia-Yi, Taiwan, 62102, Republic of China.
Biotechnology Progress
|October 30, 2013
Summary
Cholesterol-mediated cationic solid lipid nanoparticles effectively deliver saquinavir across the blood-brain barrier. Increased cholesterol and esterquat 1 enhance nanoparticle uptake and brain drug delivery for antiviral therapies.
Area of Science:
- Nanotechnology
- Drug Delivery
- Neuroscience
Background:
- The blood-brain barrier (BBB) poses a significant challenge for delivering therapeutic agents to the brain.
- Saquinavir (SQV) is an antiviral drug with potential for treating brain infections, but its BBB penetration is limited.
- Solid lipid nanoparticles (SLNs) offer a promising platform for drug delivery, but their brain-targeting efficiency needs optimization.
Purpose of the Study:
- To formulate cholesterol-mediated cationic solid lipid nanoparticles (CSLNs) for enhanced brain delivery of saquinavir (SQV).
- To investigate the effect of cholesterol and esterquat 1 (EQ 1) content on CSNL characteristics and SQV permeability across an in vitro BBB model.
- To evaluate the potential of CSNLs as a drug delivery system for brain-targeting antiviral agents.
Main Methods:
- CSLNs were formulated using cacao butter, esterquat 1 (EQ 1), and stearylamine, incorporating cholesterol.
- SQV-loaded CSLNs (SQV-CSLNs) were characterized for size, morphology, and zeta potential.
- An in vitro model using human brain-microvascular endothelial cells (HBMECs) co-cultured with astrocytes was employed to assess BBB permeability.
- Cellular uptake of SQV-CSLNs by HBMECs was evaluated using fluorescent staining.
Main Results:
- Increasing weight percentages of cholesterol and EQ 1 reduced the average diameter of SQV-CSLNs and enhanced their zeta potential.
- Morphological analysis revealed uniform SQV-CSLNs with a compact lipid structure.
- HBMECs successfully internalized SQV-CSLNs, with uptake efficiency increasing with higher cholesterol and EQ 1 content.
- Elevated cholesterol and EQ 1 levels in SQV-CSLNs significantly increased SQV permeability across the in vitro BBB model.
Conclusions:
- Cholesterol-mediated cationic solid lipid nanoparticles demonstrate tunable physicochemical properties with varying cholesterol and EQ 1 content.
- These CSLNs exhibit enhanced cellular uptake and promote increased saquinavir permeability across the blood-brain barrier.
- Cholesterol-mediated SQV-CSLNs represent a viable and efficacious strategy for brain-targeting delivery of antiviral medications.
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