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1,25(OH)2-D3 is a potent regulator of interleukin-1 induced interleukin-8 expression and production

C G Larsen1, M Kristensen, K Paludan

  • 1Department of Dermatology, Marselisborg University Hospital, Aarhus, Denmark.

Biochemical and Biophysical Research Communications
|May 15, 1991
PubMed

Insights

1,25(OH)2-D3, a vitamin D hormone, effectively inhibits Interleukin-8 (IL-8) production and gene expression in key inflammatory cells. This suggests a potential therapeutic role for vitamin D in managing inflammatory conditions.

Area of Science:

  • Immunology
  • Endocrinology
  • Dermatology

Background:

  • Interleukin-8 (IL-8) is a critical cytokine involved in inflammation, produced by various cells including keratinocytes, fibroblasts, monocytes, and endothelial cells.
  • IL-8's role in inflammation makes it a significant therapeutic target for managing inflammatory diseases.

Purpose of the Study:

  • To investigate the effect of 1,25(OH)2-cholecalciferol (1,25(OH)2-D3), an endogenous immune modulator, on Interleukin-1 (IL-1)-induced Interleukin-8 (IL-8) production.
  • To determine if 1,25(OH)2-D3 can modulate IL-8 production and gene expression in different cell types.

Main Methods:

  • Cultured keratinocytes, fibroblasts, peripheral blood monocytes (PBMC), and endothelial cells were stimulated with IL-1 alpha.
  • The effect of varying concentrations of 1,25(OH)2-D3 on IL-8 production and mRNA expression was measured.

Main Results:

  • 1,25(OH)2-D3 significantly inhibited IL-1 alpha-induced IL-8 production and mRNA expression in keratinocytes, fibroblasts, and PBMC.
  • No significant inhibition of IL-8 production was observed in endothelial cells treated with 1,25(OH)2-D3.
  • Optimal inhibitory concentrations of 1,25(OH)2-D3 ranged from 10(-10) to 10(-11) M.

Conclusions:

  • 1,25(OH)2-D3 demonstrates a regulatory role in controlling chemotactic cytokine production, specifically IL-8.
  • The findings suggest a potential therapeutic application for 1,25(OH)2-D3 in conditions characterized by excessive IL-8-mediated inflammation.

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