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  • Brynjólfsson, Siggeir FannarGothenburg University,Göteborgs universitet,Institutionen för biomedicin, avdelningen för mikrobiologi och immunologi,Institute of Biomedicine, Department of Microbiology and Immunology (author)

An Antibody Against Triggering Receptor Expressed on Myeloid Cells 1 (TREM-1) Dampens Proinflammatory Cytokine Secretion by Lamina Propria Cells from Patients with IBD.

  • Article/chapterEnglish2016

Publisher, publication year, extent ...

  • 2016
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:gup.ub.gu.se/252026
  • https://gup.ub.gu.se/publication/252026URI
  • https://doi.org/10.1097/MIB.0000000000000822DOI

Supplementary language notes

  • Language:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Triggering receptor expressed on myeloid cells 1 (TREM-1) is a potent amplifier of inflammation. Recently, the antimicrobial peptide PGLYRP-1 was shown to be the ligand of TREM-1. Here, the ability of an anti-TREM-1 antibody to dampen the release of proinflammatory cytokines by colon lamina propria cells (LPCs) from patients with IBD was investigated and correlated with PGLYRP-1 levels.Biopsies from patients with ulcerative colitis (UC, n = 45) or Crohn's disease (CD, n = 26) were compared with those from individuals undergoing colonoscopy for other reasons (n = 17). TREM-1 expression was analyzed on myeloid cells by flow cytometry. Cell culture experiments with LPCs were used to analyze PGLYRP-1 and inflammatory cytokine levels and assess the effect of anti-TREM-1 on cytokine secretion.The frequency of TREM-1-expressing neutrophils and recruited macrophages was higher in inflamed than in noninflamed biopsies. The PGLYRP-1 level in inflamed tissue was higher than in noninflamed tissue; it was produced primarily by neutrophils, and its level correlated with the secretion of proinflammatory cytokines. Secretion of myeloperoxidase, tumor necrosis factor-α, interleukin-1β, and interleukin-8 by LPCs stimulated with the potent TREM-1 agonist consisting of PGLYRP-1 complexed with peptidoglycan was reduced in the presence of anti-TREM-1. Moreover, a blocking effect of anti-TREM-1 was apparent when LPCs from a subset of inflamed individuals with elevated PGLYRP-1 were stimulated with killed bacteria.An anti-TREM-1 antibody can dampen secretion of proinflammatory cytokines in inflamed patients with elevated PGLYRP-1. Moreover, PGLYRP-1 + myeloperoxidase is a potential biomarker for predicting the effect of anti-TREM-1 therapy.

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  • Magnusson, Maria K,1972Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för invärtesmedicin och klinisk nutrition,Institutionen för biomedicin, avdelningen för mikrobiologi och immunologi,Institute of Medicine, Department of Internal Medicine and Clinical Nutrition,Institute of Biomedicine, Department of Microbiology and Immunology(Swepub:gu)xmmara (author)
  • Kong, Philip L (author)
  • Jensen, Teis (author)
  • Kuijper, Joseph L (author)
  • Håkansson, Katarina (author)
  • Read, Christine B (author)
  • Stennicke, Vibeke W (author)
  • Sjövall, Henrik,1954Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för invärtesmedicin och klinisk nutrition,Institute of Medicine, Department of Internal Medicine and Clinical Nutrition(Swepub:gu)xsjovh (author)
  • Wick, Mary Jo,1963Gothenburg University,Göteborgs universitet,Institutionen för biomedicin, avdelningen för mikrobiologi och immunologi,Institute of Biomedicine, Department of Microbiology and Immunology(Swepub:gu)xwicma (author)
  • Göteborgs universitetInstitutionen för biomedicin, avdelningen för mikrobiologi och immunologi (creator_code:org_t)

Related titles

  • In:Inflammatory bowel diseases22:8, s. 1803-111536-4844

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