Microarray analysis of retinal gene expression in the DBA/2J model of glaucoma

Investigative Ophthalmology & Visual Science
Michael R SteeleMonica L Vetter

Abstract

The DBA/2J mouse is a model for secondary angle-closure glaucoma, due to iris atrophy and pigment dispersion, which ultimately lead to increased intraocular pressure (IOP). The study was undertaken to correlate changes in retinal gene expression with IOP elevation by performing microarray analysis of retinal RNA from DBA/2J mice at 3 months before disease onset and at 8 months after IOP elevation. IOP was monitored monthly in DBA/2J animals, and animals with normal (3 months) or elevated IOP (8 months) were identified. RNA was prepared from three individual retinas at each age, and the RNA was amplified and used to generate biotin-labeled probe for high-density mouse gene microarrays (U430.2; Affymetrix, Santa Clara, CA). A subset of genes was selected for confirmation by quantitative RT-PCR, by using independent retina samples from DBA/2J animals at 3, 5, and 8 months of age and compared to retinas from C57BL/6J control animals at 3 and 8 months. There were changes in expression of 68 genes, with 32 genes increasing and 36 genes decreasing at 8 months versus 3 months. Upregulated genes were associated with immune response, glial activation, signaling, and gene expression, whereas downregulated genes included multiple crystalli...Continue Reading

Citations

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