Observational study on Swedish plaque psoriasis patients receiving narrowband-UVB treatment show decreased S100A8/A9 protein and gene expression levels in lesional psoriasis skin but no effect on S100A8/A9 protein levels in serum

PLoS One. 2019 Mar 13;14(3):e0213344. doi: 10.1371/journal.pone.0213344. eCollection 2019.

Abstract

S100A8 and S100A9 proteins are highly upregulated in patients with psoriasis and have been proposed as potential biomarkers for psoriasis. The present study was designed to analyze the effect of narrowband ultraviolet B therapy on these proteins. S100A8, S100A9 gene expression and S100A8/A9 heterocomplex protein levels were analyzed in lesional and non-lesional skin before and after narrowband-UVB treatment in patients with chronic plaque type psoriasis. In addition, disease severity was measured by psoriasis area and severity index (PASI) and serum protein levels of S100A8/A9 were repeatedly analyzed. Narrowband-UVB treatment significantly reduced S100A8, S100A9 gene expression and S100A8/A9 protein levels in lesional skin while serum levels showed no significant change. No correlation between PASI and serum S100A8/A9 protein levels was found. These results implicate a role of S100A8/A9 in the anti-inflammatory effect of narrowband-UVB. Serum S100A8/A9 levels do not respond to treatment suggesting that serum S100A8/A9 does not originate from psoriasis skin keratinocytes. Serum S100A8/A9 levels do not correlate with PASI questioning serum S100A8/A9 as a biomarker for psoriasis skin activity. Trial Registration: DRKS 00014817.

Publication types

  • Observational Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Biomarkers / blood
  • Biomarkers / metabolism
  • Calgranulin A / blood
  • Calgranulin A / genetics
  • Calgranulin A / metabolism*
  • Calgranulin B / blood
  • Calgranulin B / genetics
  • Calgranulin B / metabolism*
  • Down-Regulation / radiation effects
  • Female
  • Gene Expression / radiation effects
  • Humans
  • Keratinocytes / metabolism
  • Keratinocytes / radiation effects
  • Male
  • Middle Aged
  • Psoriasis / genetics
  • Psoriasis / metabolism*
  • Psoriasis / radiotherapy*
  • Skin / metabolism
  • Skin / radiation effects
  • Sweden
  • Ultraviolet Therapy*

Substances

  • Biomarkers
  • Calgranulin A
  • Calgranulin B
  • S100A8 protein, human
  • S100A9 protein, human

Associated data

  • DRKS/DRKS 00014817

Grants and funding

This study was funded by research grants (number 657091, 416821, 383521) from "Futurum - Academy for Health and Care". The funders had no role in study design, data collection and analysis, decision to publish or preparation of the manuscript. http://plus.rjl.se/futurum.