Noninvasive molecular imaging reveals role of PAF in leukocyte-endothelial interaction in LPS-induced ocular vascular injury

Rebecca C. Garland, Dawei Sun, Souska Zandi, Fang Xie, Sepideh Faez, Faryan Tayyari, Sonja A.F. Frimmel, Alexander Schering, shintaro nakao, Ali Hafezi-Moghadam

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Uveitis is a systemic immune disease and a common cause of blindness. The eye is an ideal organ for light-based imaging of molecular events underlying vascular and immune diseases. The phospholipid platelet-activating factor (PAF) is an important mediator of inflammation, the action of which in endothelial and immune cells in vivo is not well understood. The purpose of this study was to investigate the role of PAF in endothelial injury in uveitis. Here, we use our recently introduced in vivo molecular imaging approach in combination with the PAF inhibitors WEB 2086 (WEB) and ginkgolide B (GB). The differential inhibitory effects of WEB and GB in reducing LPS-induced endothelial injury in the choroid indicate an important role for PAF-like lipids, which might not require the PAF receptor for their signaling. P-selectin glycoprotein ligand-1-mediated rolling of mouse leukocytes on immobilized P-selectin in our autoperfused microflow chamber assay revealed a significant reduction in rolling velocity on the cells' contact with PAF. Rolling cells that came in contact with PAF rapidly assumed morphological signs of cell activation, indicating that activation during rolling does not require integrins. Our results show a key role for PAF in mediating endothelial and leukocyte activation in acute ocular inflammation. Our in vivo molecular imaging provides a detailed view of cellular and molecular events in the complex physiological setting.

Original languageEnglish
Pages (from-to)1284-1294
Number of pages11
JournalFASEB Journal
Volume25
Issue number4
DOIs
Publication statusPublished - Apr 1 2011
Externally publishedYes

Fingerprint

Eye Injuries
Molecular imaging
Molecular Imaging
Platelet Activating Factor
Vascular System Injuries
Leukocytes
ginkgolide B
Chemical activation
Immune System Diseases
Uveitis
WEB 2086
Leukocyte Rolling
Inflammation Mediators
P-Selectin
Choroid
Wounds and Injuries
Blindness
Vascular Diseases
Integrins
Assays

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biochemistry
  • Molecular Biology
  • Genetics

Cite this

Garland, R. C., Sun, D., Zandi, S., Xie, F., Faez, S., Tayyari, F., ... Hafezi-Moghadam, A. (2011). Noninvasive molecular imaging reveals role of PAF in leukocyte-endothelial interaction in LPS-induced ocular vascular injury. FASEB Journal, 25(4), 1284-1294. https://doi.org/10.1096/fj.10-160051

Noninvasive molecular imaging reveals role of PAF in leukocyte-endothelial interaction in LPS-induced ocular vascular injury. / Garland, Rebecca C.; Sun, Dawei; Zandi, Souska; Xie, Fang; Faez, Sepideh; Tayyari, Faryan; Frimmel, Sonja A.F.; Schering, Alexander; nakao, shintaro; Hafezi-Moghadam, Ali.

In: FASEB Journal, Vol. 25, No. 4, 01.04.2011, p. 1284-1294.

Research output: Contribution to journalArticle

Garland, RC, Sun, D, Zandi, S, Xie, F, Faez, S, Tayyari, F, Frimmel, SAF, Schering, A, nakao, S & Hafezi-Moghadam, A 2011, 'Noninvasive molecular imaging reveals role of PAF in leukocyte-endothelial interaction in LPS-induced ocular vascular injury', FASEB Journal, vol. 25, no. 4, pp. 1284-1294. https://doi.org/10.1096/fj.10-160051
Garland, Rebecca C. ; Sun, Dawei ; Zandi, Souska ; Xie, Fang ; Faez, Sepideh ; Tayyari, Faryan ; Frimmel, Sonja A.F. ; Schering, Alexander ; nakao, shintaro ; Hafezi-Moghadam, Ali. / Noninvasive molecular imaging reveals role of PAF in leukocyte-endothelial interaction in LPS-induced ocular vascular injury. In: FASEB Journal. 2011 ; Vol. 25, No. 4. pp. 1284-1294.
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