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Cyclodextrin modified niosomes to encapsulate hydrophilic compounds.

Noelia D Machado1, O Fernando Silva1, Rita H de Rossi1

  • 1Instituto de Investigaciones en Físico-Química de Córdoba (INFIQC-CONICET), Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria X5000HUA Córdoba Argentina marfer@fcq.unc.edu.ar.

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Summary
This summary is machine-generated.

Niosomes enhanced with cyclodextrins show improved encapsulation of methyl orange dye. Modified cyclodextrins reduced niosome size, altering dye complexation and release dynamics.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Physical Chemistry

Background:

  • Niosomes are non-ionic surfactant vesicles used for encapsulation.
  • Cyclodextrins (CDs) can modify vesicular properties and drug delivery.
  • Azo dyes like methyl orange (MO) and methyl yellow (MY) serve as probes for hydrophobicity.

Purpose of the Study:

  • To investigate the effect of beta-cyclodextrin (β-CD) and modified beta-cyclodextrin (Mod-β-CD) on niosome encapsulation efficiency and dye release.
  • To understand the interaction of MO and MY with niosomes and CDs.
  • To characterize the structural changes in niosomes upon CD incorporation.

Main Methods:

  • Preparation of niosomes from Span 80 and Tween 80.
  • Encapsulation of methyl orange (MO) and methyl yellow (MY) azo dyes.
  • Addition of β-CD or Mod-β-CD to niosomes.
  • Analysis of vesicle size, morphology, entrapment efficiency (EE), and dye release kinetics.
  • UV-visible spectrophotometry and induced circular dichroism (ICD) for interaction studies.

Main Results:

  • Mod-β-CD incorporation reduced niosome size and surface charge.
  • Niosomes showed higher EE for MY than MO without CDs.
  • β-CD significantly increased MO encapsulation and accelerated its release.
  • MO complexed with CDs inside vesicles, while MY interacted with the niosome bilayer.

Conclusions:

  • Mod-β-CD alters niosome structure, impacting dye encapsulation and release.
  • MO interaction with niosomes is modulated by β-CD complexation.
  • The study elucidates the differential interactions of MO and MY with niosomes and CDs, offering insights for targeted delivery systems.