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Induction of Functional Photoreceptor Phenotype by Exogenous Crx Expression in Mouse Retinal Stem Cells

By Catherine Jomary and Stephen E. Jones


PURPOSE. This study was undertaken to determine whether exogenous expression of the transcription factor Crx can promote the differentiation of mouse retinal stem cells (RSCs) into cells with a functional photoreceptor phenotype exhibiting light-sensitive properties. METHODS. RSCs isolated from mouse ciliary epithelium and maintained in serum-free culture were genetically modified by electroporation to express exogenous epitope-tagged murine Crx. Changes in the expression of stem cell markers (homeodomain transcription factor Pax6; POU transcription factor Oct3/4; proliferating cell nuclear antigen [PCNA]); of neuronal markers (nestin, neuron-specific class III �-tubulin [ � III Tub] and neurofilament [NF 200]); and of photoreceptor-specific markers (rhodopsin [Rho], cyclic nucleotide-gated cation channel-3 [CNG3], blue-cone opsin, and cGMP phosphodiesteras

Year: 2013
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