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Solid lipid nanoparticles loaded with lipoyl-memantine codrug: preparation and characterization.
Sara Laserra1, Abdul Basit2, Piera Sozio1
1Department of Pharmacy, "G. d'Annunzio" University of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy.
International Journal of Pharmaceutics
|March 10, 2015
Summary
Stealth solid lipid nanoparticles (SLNs) effectively deliver lipoyl-memantine, a potential Alzheimer's codrug, enhancing solubility and absorption. These SLNs show no cytotoxicity and are suitable for further in vivo investigation as a brain drug delivery system.
Area of Science:
- Nanotechnology
- Pharmaceutics
- Neuroscience
Background:
- Solid lipid nanoparticles (SLNs) are promising drug delivery systems (DDS) for enhancing therapeutic agent efficacy.
- Alzheimer's disease poses challenges for conventional treatments, necessitating innovative drug delivery approaches.
- Lipoyl-memantine (LA-MEM) is a potential codrug for Alzheimer's disease.
Purpose of the Study:
- To prepare and characterize stealth SLNs loaded with lipoyl-memantine (LA-MEM).
- To evaluate the physicochemical properties, in vitro release, and cytotoxicity of LA-MEM loaded SLNs.
- To assess the potential of these SLNs as a drug delivery system for the gastrointestinal tract and brain.
Main Methods:
- Preparation of stealth SLNs loaded with LA-MEM.
- Physicochemical characterization including particle size, polydispersity index (PDI), zeta potential, and entrapment efficiency.
- Differential scanning calorimetry (DSC) for analyzing formulation structure.
- In vitro release studies in simulated gastric fluid (SGF) and simulated intestinal fluid (SIF).
- In vitro cytotoxicity assessment.
Main Results:
- Optimized SLNs formulation achieved an average intensity diameter of 170nm, PDI of 0.072, zeta potential of -33.8mV, and 88% entrapment efficiency at a 1:5 drug-lipid ratio.
- DSC analysis clarified the crystalline structure of the formulation.
- In vitro studies demonstrated stability and controlled release of LA-MEM in SGF and SIF.
- Preliminary cytotoxicity studies indicated the SLNs were devoid of cytotoxicity.
Conclusions:
- Stealth SLNs loaded with LA-MEM represent a viable strategy to improve the solubility and absorption of this potential anti-Alzheimer codrug.
- The characterized SLNs demonstrate suitable physicochemical properties and in vitro release profiles for oral drug delivery.
- The absence of cytotoxicity and potential for brain delivery warrant further in vivo investigation of these LA-MEM loaded SLNs as a promising DDS.
