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Related Concept Videos

Micelles01:30

Micelles

153
Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...
153

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Native Cell Membrane Nanoparticles System for Membrane Protein-Protein Interaction Analysis
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Structural analysis of nanosystems: Solid Sorbitan esters Nanoparticles (SSN) as a case study.

Andrea Pensado1, Manuel Martín-Pastor2, Giovanni K Zorzi3

  • 1Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, Universidade de Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain.

European Journal of Pharmaceutics and Biopharmaceutics : Official Journal of Arbeitsgemeinschaft Fur Pharmazeutische Verfahrenstechnik E.V
|May 11, 2016
PubMed
Summary

Nuclear Magnetic Resonance (NMR) techniques reveal the solid nanostructure of sorbitan ester nanoparticles (SSN), differentiating them from vesicular systems. This characterization aids in optimizing drug delivery nanosystem design and applications.

Keywords:
ISSTDInvisible State STDNanoparticlesSaturation Transfer DifferenceSorbitan estersSorbitan monooleateWaterLOGSY

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Biophysics

Background:

  • Conventional characterization of drug delivery nanosystems (size, zeta potential, morphology) is insufficient for optimization.
  • Understanding nanostructure and component reorganization is crucial for developing effective nanosystems.
  • Novel characterization techniques are needed to move beyond trial-and-error in nanosystem design.

Purpose of the Study:

  • To explore the potential of Nuclear Magnetic Resonance (NMR) techniques for characterizing nanotechnological drug delivery systems.
  • To investigate the nanostructure and internal dynamics of sorbitan monooleate-based nanosystems.
  • To differentiate between solid and vesicular nanostructures using advanced NMR methods.

Main Methods:

  • Utilized proton NMR ((1)H NMR) spectroscopy.
  • Employed Saturation Transfer Difference (STD) NMR for observing signals in large aggregates.
  • Applied Invisible State STD (ISSTD) NMR to analyze 'invisible signals' within nanosystems.

Main Results:

  • NMR techniques revealed a gradient of flexibility within the nanosystems, from a rigid core to a flexible surface.
  • Demonstrated the absence of water content in both the core and surface regions.
  • Characterized the nanosystems as having a solid nanostructure, distinct from vesicular structures, termed Solid Sorbitan esters Nanoparticles (SSN).

Conclusions:

  • The solid nanostructure of SSN, confirmed by NMR, explains their observed high stability.
  • NMR techniques provide valuable insights into nanostructure and component dynamics, crucial for drug delivery.
  • These advanced characterization methods can facilitate the design, improvement, and new applications of drug delivery nanosystems.