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Preclinical Testing of Dendritic Core-Multishell Nanoparticles in Inflammatory Skin Equivalents.

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Summary

Human skin equivalents effectively assessed anti-inflammatory effects of dexamethasone (DXM) for atopic dermatitis (AD) research. Nanoparticle formulations showed superiority, though robust readout parameters require careful study design.

Keywords:
atopic dermatitisdexamethasoneglucocorticoidsnanoparticlesskin equivalentstopical drug delivery

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Area of Science:

  • Dermatology
  • Preclinical Research
  • Nanotechnology

Background:

  • Human skin equivalents are emerging as valuable tools in preclinical dermatological research.
  • Their utility in bridging the translational gap between preclinical and clinical studies requires further investigation.
  • Few studies have explored their suitability for preclinical drug testing.

Purpose of the Study:

  • To investigate the suitability of inflammatory skin equivalents, mimicking atopic dermatitis (AD) hallmarks, for assessing anti-inflammatory effects of dexamethasone (DXM).
  • To compare the efficacy of DXM in a cream formulation versus a nanoparticle formulation.
  • To evaluate DXM's impact on key molecular markers and potential side effects.

Main Methods:

  • Developed inflammatory skin equivalents emulating atopic dermatitis (AD) characteristics.
  • Applied dexamethasone (DXM) in cream and nanoparticle formulations topically.
  • Quantified changes in TSLP, involucrin expression, and glucocorticoid receptor translocation.
  • Assessed gene expression of extracellular matrix components.

Main Results:

  • Topical DXM significantly reduced TSLP expression and increased involucrin expression in a dose-dependent manner.
  • DXM facilitated glucocorticoid receptor translocation.
  • DXM treatment inhibited extracellular matrix component gene expression, suggesting potential skin atrophy.
  • The nanoparticle formulation demonstrated superior efficacy compared to the cream.

Conclusions:

  • Inflammatory human skin equivalents are suitable for assessing the anti-inflammatory effects of DXM in AD models.
  • Nanoparticle-loaded DXM exhibited enhanced therapeutic effects.
  • Identifying robust readout parameters for such models remains a challenge, necessitating careful experimental design.