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Adhesion molecules in experimental phacoanaphylactic endophthalmitis.

G O Till1, S Lee, M S Mulligan

  • 1Department of Pathology, University of Michigan Medical School, Ann Arbor 48109-0602.

Investigative Ophthalmology & Visual Science
|November 11, 1992
PubMed
Summary

Blocking neutrophil (CD18) and endothelial (ELAM-1) adhesion molecules significantly reduces inflammation and injury in experimental phacoanaphylactic endophthalmitis (EPE) in rats.

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Area of Science:

  • Ophthalmology
  • Immunology
  • Inflammation Research

Background:

  • Experimental phacoanaphylactic endophthalmitis (EPE) is characterized by neutrophil infiltration into the eye.
  • Neutrophil and endothelial adhesion molecules are crucial for directing neutrophils to inflammatory sites.

Purpose of the Study:

  • To investigate the therapeutic potential of blocking neutrophil (CD18) and endothelial (ELAM-1) adhesion molecules in EPE.
  • To determine if inhibiting these adhesion molecules can attenuate ocular inflammation and injury in a rat model.

Main Methods:

  • Lewis rats were induced with experimental phacoanaphylactic endophthalmitis (EPE).
  • Animals were treated with antibodies targeting CD18 on neutrophils or ELAM-1 on endothelial cells.
  • Intraocular neutrophil accumulation, retinal hemorrhage, vasculitis, and retinal edema were assessed.

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Main Results:

  • Treatment with anti-CD18 or anti-ELAM-1 antibodies significantly reduced intraocular neutrophil accumulation.
  • These treatments also suppressed retinal hemorrhage, vasculitis, and attenuated retinal edema by 48% and 70% respectively.
  • Antibody blockade of adhesion molecules demonstrated potent anti-inflammatory effects.

Conclusions:

  • Adhesion molecules CD18 and ELAM-1 play a critical role in neutrophil recruitment during EPE.
  • Targeting these adhesion molecules with antibodies offers a promising therapeutic strategy for ameliorating ocular injury in EPE.
  • Blocking neutrophil and endothelial adhesion molecules effectively reduces inflammation and tissue damage in experimental endophthalmitis.