Intercellular adhesion molecule 1 mediates migration of Th1 and Th17 cells across human retinal vascular endothelium

Arpita S Bharadwaj, Lauren P Schewitz-Bowers, Lai Wei, Richard W J Lee, Justine R Smith

Research output: Contribution to journalArticle (Academic Journal)peer-review

24 Citations (Scopus)

Abstract

PURPOSE: Autoimmune inflammation of the retina causes vision loss in the majority of affected individuals. Th1 or Th17 cells initiate the disease on trafficking from the circulation into the eye across the retinal vascular endothelium. We investigated the ability of human Th1- and Th17-polarized cells to cross a simulated human retinal endothelium, and examined the role of IgG superfamily members in this process.

METHODS: Th1- and Th17-polarized cell populations were generated from human peripheral blood CD4(+) T cells, using two Th1- and Th17-polarizing protocols. Transendothelial migration assays were performed over 18 hours in Boyden chambers, after seeding the transwell membrane with human retinal endothelial cells. In some assays intercellular adhesion molecule 1 (ICAM-1), vascular cell adhesion molecule 1 (VCAM-1), or activated leukocyte cell adhesion molecule (ALCAM) blocking antibody, or isotype- and concentration-matched control antibody, was added to the upper chambers.

RESULTS: Th1- and Th17-polarized cells migrated equally efficiently across the human retinal endothelial monolayer. The percentage of IL-17(+) IFN-γ(-) Th17-polarized cells was reduced following migration. Blocking ICAM-1, but not VCAM-1 or ALCAM, significantly reduced migration of Th1- and Th17-polarized cells for a majority of human donors.

CONCLUSIONS: Taken in the context of other literature on transendothelial migration, our results illustrate the importance of investigating the specific tissue and vascular endothelium when considering helper T cell migration in autoimmune inflammation. Our findings further indicate that while generalizations about involvement of specific adhesion molecules in uveitis and other autoimmune disease may be possible, these may not apply to individual patients universally. The observations are relevant to the use of adhesion blockade for therapeutic purposes.

Original languageEnglish
Pages (from-to)6917-25
Number of pages9
JournalInvestigative Ophthalmology and Visual Science
Volume54
Issue number10
DOIs
Publication statusPublished - 2013

Keywords

  • Activated-Leukocyte Cell Adhesion Molecule
  • Cells, Cultured
  • Cytokines
  • Endothelium, Vascular
  • Humans
  • Intercellular Adhesion Molecule-1
  • Retinal Vessels
  • Th1 Cells
  • Th17 Cells
  • Transendothelial and Transepithelial Migration
  • Vascular Cell Adhesion Molecule-1

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