Inhibition of corneal neovascularization by a peroxisome proliferator-activated receptor-γ ligand

Melvin A. Sarayba, Li Li, Tulaya Tungsiripat, Norman H. Liu, Paula M. Sweet, Anup J. Patel, Kathryn E. Osann, Amar Chittiboyina, Stephen C. Benson, Harrihar A. Pershadsingh, Roy S. Chuck

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

Purpose. To determine the efficacy of the peroxisome proliferator-activated receptor γ agonist, pioglitazone, in inhibiting corneal neovascularization. Methods. Twenty-six adult male Sprague-Dawley rats were randomly divided into three groups. Each group received intrastromal polymer micropellets containing one of the following: Group 1, no active ingredient (n=10); Group 2, vascular endothelial growth factor (VEGF) (n=7); Group 3, VEGF and pioglitazone (n=9). Neovascularization was evaluated 7 days after pellet implantation. After systemic India ink injection, digital photographs of the eyes were taken. The area and density of neovascularization were measured using imaging software. Results. Mean area of neovascularization was 0.43±0.18 mm2 for Group 1, 2.87±0.48 mm2 for Group 2 and 2.10±0.22 mm2 for Group 3. Statistical analysis showed significant differences between Groups 1 and 2 and Groups 1 and 3. There was no significant difference between Groups 2 and 3. Mean density of neovascularization was 2.16±0.66 for Group 1, 27.14±2.93 for Group 2 and 12.02±2.24 for Group 3. All comparisons between groups were statistically significant (P<0.01). Conclusions. Pioglitazone is effective in decreasing the density of angiogenesis in a VEGF-induced neovascular rat cornea model. There is possibility of even greater effect with higher doses of the drug. Pioglitazone is a promising drug for the treatment of ocular neovascularization.

Original languageEnglish (US)
Pages (from-to)435-442
Number of pages8
JournalExperimental Eye Research
Volume80
Issue number3
DOIs
StatePublished - Mar 2005
Externally publishedYes

Keywords

  • Cornea
  • Neovascularization
  • PPAR
  • Pioglitazone
  • Thiazolidinediones

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

Fingerprint Dive into the research topics of 'Inhibition of corneal neovascularization by a peroxisome proliferator-activated receptor-γ ligand'. Together they form a unique fingerprint.

Cite this