Abstract | BACKGROUND: METHODS: Using FIZ, the gelatinolytic activity of MMPand BPHA-reduction on gelatinolysis were examined in diode-laser-induced CNV lesions in a total of 22 male Brown Norway rats. The MMP subtypes were studied in the CNV lesions of three rats using conventional zymography. Vehicle solution only or 25-, 50-, or 100 mg/kg- body-weight of BPHA was administered orally twice daily for 14 days after the laser photocoagulation in 18 rats, respectively. Fluorescein angiograms were taken, and the late hyperfluorescence of CNVs was given scores by three researchers using four grades. The thickness of CNV lesions was studied histologically. RESULTS: In laser-induced CNVs, the gelatinolytic activity of MMP and reduction of gelatinolysis by BPHA were observed on FIZ, and MMP-2 and proMMP-2 were identified by conventional zymography. The scores given to the late dye leakage and staining on angiograms were lower in the BPHA-treated groups ( p<0.01) than in the controls, and the effect appeared to be dose-dependent. Similarly, the CNV lesions in the BPHA-treated groups were less thick than in the controls ( p<0.01). CONCLUSIONS: MMP-2 played a role in laser-induced CNV development, and administration of BPHA reduced the experimental CNVs.
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Authors | Takashi Kohri, Mitsuyasu Moriwaki, Masatoshi Nakajima, Hitoshi Tabuchi, Kunihiko Shiraki |
Journal | Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie
(Graefes Arch Clin Exp Ophthalmol)
Vol. 241
Issue 11
Pg. 943-52
(Nov 2003)
ISSN: 0721-832X [Print] Germany |
PMID | 14586590
(Publication Type: Journal Article)
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Chemical References |
- Enzyme Inhibitors
- Enzyme Precursors
- Hydroxamic Acids
- N-biphenylsulfonylphenylalanine hydroxamic acid
- Metalloproteases
- Gelatinases
- Metalloendopeptidases
- progelatinase
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Topics |
- Administration, Oral
- Animals
- Choroidal Neovascularization
(diagnosis, etiology, pathology, physiopathology)
- Enzyme Inhibitors
(administration & dosage)
- Enzyme Precursors
(metabolism)
- Fluorescein Angiography
- Gelatinases
(metabolism, pharmacology)
- Hydroxamic Acids
(administration & dosage, antagonists & inhibitors)
- Immunohistochemistry
- Lasers
- Male
- Metalloendopeptidases
(metabolism)
- Metalloproteases
(antagonists & inhibitors)
- Radiation Injuries, Experimental
(complications)
- Rats
- Rats, Inbred BN
- Weight Gain
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