Photodynamic Therapy for Antifibrosis in a Rabbit Model of Filtration Surgery
| Autor: | Ann Hamilton, Lih-Huei L. Liaw, Richard A. Hill, David H Crean, Michael W. Berns, Daniel R. Doiron, Thomas J McDonald, Ferris Ghosheh |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
medicine.medical_specialty
Conjunctiva Lagomorpha biology business.industry medicine.medical_treatment Urology Photodynamic therapy biology.organism_classification medicine.disease Surgery medicine.anatomical_structure Pharmacokinetics Tin ethyl etiopurpurin Fibrosis medicine Photosensitizer business Complication |
| Zdroj: | Ophthalmic Surgery, Lasers and Imaging Retina. 28:574-581 |
| ISSN: | 2325-8179 2325-8160 |
| DOI: | 10.3928/1542-8877-19970701-07 |
| Popis: | * BACKGROUND AND OBJECTIVE: The purpose of this pilot study was to investigate the use of photodynamic therapy (PDT) using tin ethyl etiopurpurin (SnET2) as an adjunctive antifibrotic therapy for filtering surgery in a rabbit model. * MATERIALS AND METHODS: The pharmacokinetics of SnET2 were established by intravenous (1 mg/kg) and subconjunctival (25, 50, or 75 ug) injections and compared with controls. Intravenous and subconjunctival SnET2 injections were given prior to posterior Hp sclerectomies followed by postoperative laser irradiation (664 ± 7 nm; 100 mW/cm p 2 ; 30 J/cm p 2 ). Antifibrotic efficacy was established by clinical response and histologic examination. * RESULTS: After subconjunctival injections, large areas of avascular conjunctiva were produced and filtering bleb survival was prolonged. No effect was found for intravenously administered photosensitizer followed by light irradiation. * CONCLUSIONS: PDT may be an alternative antifibrotic therapy for filtration surgery that does not use chemotherapeutic agents or ionizing radiation. Multiple parameters (light, drug dose, irradiation area) may be manipulated to improve predictability of the antifibrotic effect. [Ophthalmic Surg Lasers 1997;28:574-581.] |
| Databáze: | OpenAIRE |
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