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Rutin-Loaded Solid Lipid Nanoparticles: Characterization and In Vitro Evaluation.

Federica De Gaetano1, Maria Chiara Cristiano2, Valentina Venuti3

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Researchers developed solid lipid nanoparticles loaded with rutin (RT-SLNs) for treating oxidative stress. These nanoparticles showed efficient rutin encapsulation and enhanced antioxidant activity in cell studies, suggesting potential therapeutic benefits.

Keywords:
Raman spectroscopySEMU373 culture cellsantioxidant assayrutinsolid lipid nanoparticles

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Area of Science:

  • Nanotechnology
  • Pharmacology
  • Biochemistry

Background:

  • Oxidative stress contributes to various diseases.
  • Rutin possesses antioxidant properties but faces bioavailability challenges.
  • Solid lipid nanoparticles offer a promising delivery system for antioxidants.

Purpose of the Study:

  • To prepare and characterize solid lipid nanoparticles loaded with rutin (RT-SLNs).
  • To evaluate the encapsulation efficiency, in vitro release, and antioxidant activity of RT-SLNs.
  • To investigate the potential of RT-SLNs for treating oxidative stress-induced diseases.

Main Methods:

  • Solid lipid nanoparticles (SLNs) were prepared using Phospholipon 80H® and Polysorbate 80 via solvent emulsification/diffusion.
  • Nanoparticle size, zeta potential, encapsulation efficiency, and drug content were determined.
  • In vitro drug release, morphology (SEM), drug-lipid interactions (Raman spectroscopy), and antioxidant activity in U373 cells were assessed.

Main Results:

  • Spherical RT-SLNs with hydrodynamic radii of 40-60 nm were successfully prepared.
  • High encapsulation efficiency and drug content were achieved, especially with a 5% theoretical rutin amount.
  • Fickian diffusion governed rutin release; RT-SLNs demonstrated dose-dependent antioxidant activity superior to free rutin in cell assays.

Conclusions:

  • RT-SLNs are effectively prepared with good physicochemical properties and high rutin loading.
  • The developed RT-SLNs exhibit controlled release kinetics and enhanced antioxidant efficacy.
  • RT-SLNs represent a promising nanocarrier for improving rutin's therapeutic potential in oxidative stress-related conditions.