Intravitreal injection of methotrexate in an experimental rabbit model: Determination of ultrastructural changes.
Indian J Ophthalmol
;
2013 July; 61(7): 329-333
Artigo
em Inglês
| IMSEAR
| ID: sea-148206
ABSTRACT
Purpose:
To investigate the ultrastructural changes of the rabbit retina induced by intravitreal methotrexate injection. Materials andMethods:
Ten New Zealand white rabbits were enucleated bilaterally at different time periods after intravitreal methotrexate injection. One rabbit was used as control group and one rabbit was used as intact group. Histopathological examinations were performed under light and electron microscopy. Early (within first three days after injection) and long-term (one month after serial injections) effects of intravitreal methotrexate on the retina were investigated.Results:
Retinal edema, vacuolization, and disintegration of mitochondria of the retinal cells were observed as early changes. The main long-term effects after serial injections were edema in the photoreceptor, inner nuclear, and ganglionic cell layers. Cellular disorganisation was seen on light microscopy. Electron microscopic examination revealed mitochondrial degeneration and vacuole formation in retinal cells, nuclear degeneration in outer nuclear layer, and membranous whorl formation in photoreceptor and nerve fiber layers. Conclusions High dose intravitreal methotrexate injection may cause significant ultrastructural changes in the rabbit retina in varying severity. This finding may highlight the potential side effects of methotrexate on human retina in higher doses.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Tipo de estudo:
Estudo prognóstico
Idioma:
Inglês
Revista:
Indian J Ophthalmol
Ano de publicação:
2013
Tipo de documento:
Artigo
Similares
MEDLINE
...
LILACS
LIS