Abstract | PURPOSE: METHODS: Transient retinal ischemia was induced by temporary ligation of the optic nerve sheath for 60 minutes in male Long-Evans rats. After the induction of ischemia, experimental eyes received a periocular injection of TA (2 mg). In control animals, the same volume of saline was administered. Leukocyte dynamics were evaluated in the retinal microcirculation using acridine orange digital fluorography. Also, retinal thickness was studied by using optical coherence tomography and a histologic METHOD: RESULTS: The leukocytes rolling along retinal vein linings increased after ischemia in the vehicle-treated rats (32.5 +/- 2.1 cells/min). No rolling leukocytes, however, were seen in the TA-treated rats. The number of accumulated leukocytes was significantly lower in the TA-treated rats (831 +/- 99 cells/mm2) than in the control (971 +/- 81 cells/mm2, P < 0.05). The treatment decreased the retinal thickness and the mRNA expression of P-selectin and ICAM-1. CONCLUSIONS: The present study demonstrated that the periocular injection of TA effectively decreased retinal thickness and inhibited leukocyte-endothelium interactions in the retina after ischemia. Downregulation of adhesion molecules of retinal vascular endothelium induced by TA may play a role in the course.
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Authors | Shimon Mizuno, Akiko Nishiwaki, Hiroshi Morita, Takatomo Miyake, Yuichiro Ogura |
Journal | Investigative ophthalmology & visual science
(Invest Ophthalmol Vis Sci)
Vol. 48
Issue 6
Pg. 2831-6
(Jun 2007)
ISSN: 0146-0404 [Print] United States |
PMID | 17525219
(Publication Type: Journal Article)
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Chemical References |
- Fluorescent Dyes
- Glucocorticoids
- P-Selectin
- RNA, Messenger
- Intercellular Adhesion Molecule-1
- Acridine Orange
- Triamcinolone Acetonide
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Topics |
- Acridine Orange
- Animals
- Cell Communication
(drug effects)
- Disease Models, Animal
- Endothelium, Vascular
(metabolism)
- Fluorescent Dyes
- Gene Expression
- Glucocorticoids
(administration & dosage)
- Injections
- Intercellular Adhesion Molecule-1
(genetics)
- Ischemia
(complications)
- Leukocytes
(metabolism)
- Macular Edema
(drug therapy, etiology, metabolism)
- Male
- P-Selectin
(genetics)
- RNA, Messenger
(metabolism)
- Rats
- Rats, Long-Evans
- Retinal Diseases
(complications)
- Retinal Vessels
- Reverse Transcriptase Polymerase Chain Reaction
- Triamcinolone Acetonide
(administration & dosage)
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