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Updated: Feb 7, 2026
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Solid Lipid Nanoparticles SLNs for Intracellular Targeting Applications
Published on: November 17, 2015
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Application of Response Surface Method for Preparation, Optimization, and Characterization of Nicotinamide Loaded
Molood Alsadat Vakilinezhad1, Shima Tanha1, Hashem Montaseri2
1Department of Pharmaceutics, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.
Advanced Pharmaceutical Bulletin
|July 20, 2018
Summary
Solid lipid nanoparticles (SLNs) effectively encapsulate hydrophilic drugs like nicotinamide. Statistical design optimized SLN preparation for enhanced drug delivery and controlled release, showing no toxicity.
Area of Science:
- Pharmaceutical Sciences
- Nanotechnology
- Drug Delivery
Background:
- Solid lipid nanoparticles (SLNs) offer pharmaceutical advantages for drug delivery.
- Encapsulating hydrophilic drugs into SLNs presents a significant challenge.
- Nicotinamide, a hydrophilic histone deacetylase inhibitor, was chosen as a model drug.
Purpose of the Study:
- To enhance encapsulation efficiency of hydrophilic drugs in SLNs using statistical design.
- To optimize SLN preparation conditions for improved particle characteristics.
- To evaluate the in vitro release profile and cytotoxicity of optimized SLNs.
Main Methods:
- Pre-formulation studies and preliminary tests identified key parameters.
- Response Surface Method (RSM) was employed for optimization.
- Particle size, zeta potential, and encapsulation efficiency were analyzed.
Main Results:
- Optimized SLNs measured 107 nm with a zeta potential of -40.9 and 36% encapsulation efficiency.
- Quadratic models accurately described the relationship between preparation variables and particle characteristics.
- In vitro release showed controlled release after an initial burst; no toxicity was observed.
Conclusions:
- The statistical model is suitable for designing SLN delivery systems for water-soluble drugs.
- Optimized SLNs demonstrate potential for controlled drug delivery.
- SLNs offer a viable platform for enhancing the delivery of challenging hydrophilic compounds.
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