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Related Experiment Video

Updated: May 29, 2026

Solid Lipid Nanoparticles (SLNs) for Intracellular Targeting Applications
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Cationic solid lipid nanoparticles (cSLN): structure, stability and DNA binding capacity correlation studies.

S Doktorovova1, R Shegokar, E Rakovsky

  • 1Institute of Biotechnology and Bioengineering, Centre of Genomics and Biotechnology, University of Trás-os-Montes and Alto Douro (IBB/CGB-UTAD), Vila-Real, Portugal.

International Journal of Pharmaceutics
|September 13, 2011
PubMed
Summary
This summary is machine-generated.

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Cationic solid lipid nanoparticles (cSLN) offer effective intracellular gene delivery. Different solid lipids impact cSLN stability and DNA binding, with Imwitor 900P showing enhanced DNA binding capacity.

Area of Science:

  • Nanotechnology
  • Biomaterials Science
  • Pharmaceutical Sciences

Background:

  • Cationic solid lipid nanoparticles (cSLN) are advanced lipid nanocarriers for gene delivery.
  • Utilizing well-established materials, cSLN offer a promising platform for intracellular applications.

Purpose of the Study:

  • To produce and characterize cSLN using cetyltrimethylammonium bromide.
  • To compare the physicochemical properties, pDNA stability, and binding capacity of cSLN formulated with different solid lipids (Imwitor 900P and Compritol 888 ATO).

Main Methods:

  • High-pressure homogenization for cSLN production.
  • Photon correlation spectroscopy (PCS) and laser diffractometry (LD) for particle size distribution.
  • Differential scanning calorimetry (DSC) for thermal behavior.

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Last Updated: May 29, 2026

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08:19

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  • X-ray diffraction (WAXD) for polymorphic phase analysis.

    • Main Results:

    • Imwitor 900P-based SLN (IMW-SLN) exhibited smaller particle sizes (z-ave=138-157 nm) and maintained size for 14 days.
    • Compritol 888 ATO-based SLN (COM-SLN) were larger (z-ave=334 nm) but stable for 90 days.
    • IMW-SLN demonstrated superior pDNA binding capacity compared to COM-SLN.

    Conclusions:

    • The choice of solid lipid significantly influences cSLN characteristics, including particle size, stability, and pDNA binding.
    • Differences in interactions between the solid lipid and cationic lipid likely explain the observed variations in performance.
    • cSLN represent a viable and tunable system for gene delivery applications.