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Resolvin E1 attenuates murine psoriatic dermatitis.

Yu Sawada1,2, Tetsuya Honda3, Satoshi Nakamizo1

  • 1Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan.

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|August 10, 2018
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Summary

Omega-3 fatty acids may treat psoriasis. Resolvin E1 (RvE1), an omega-3 metabolite, reduced skin inflammation and key cytokine production in a mouse model, suggesting therapeutic potential.

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Area of Science:

  • Immunology
  • Dermatology
  • Pharmacology

Background:

  • Psoriasis is a chronic inflammatory skin disease linked to the IL-23/IL-17 axis.
  • Epidemiological studies suggest omega-3 poly-unsaturated fatty acids (PUFAs) may reduce psoriasis severity, but mechanisms are unclear.

Purpose of the Study:

  • To investigate the therapeutic potential of resolvin E1 (RvE1), an omega-3 PUFA metabolite, for psoriasis.
  • To elucidate the molecular mechanisms underlying RvE1's effects on psoriatic dermatitis.

Main Methods:

  • An imiquimod-induced mouse model of psoriasis was used to evaluate RvE1's effects.
  • In vitro and in vivo studies assessed RvE1's impact on immune cell infiltration, cytokine expression, and cell migration.
  • The role of BLT1 receptor antagonism in RvE1's suppressive effects was examined.

Main Results:

  • RvE1 significantly suppressed inflammatory cell infiltration and epidermal hyperplasia in psoriatic skin.
  • RvE1 reduced interleukin-23 (IL-23) mRNA expression and production by dendritic cells (DCs).
  • RvE1 inhibited the migration of cutaneous DCs and gamma delta T cells (γδ T cells), a major IL-17 source, via BLT1 antagonism.

Conclusions:

  • RvE1 demonstrates potent anti-inflammatory effects in a mouse model of psoriasis.
  • RvE1 ameliorates psoriatic dermatitis by suppressing inflammatory cell infiltration, IL-23 production, and γδ T cell migration.
  • RvE1 represents a promising therapeutic target for psoriasis, mediated through omega-3 PUFA pathways.