title: Analysis of transcriptional regulatory pathways of photoreceptor genes by expression profiling of the Otx2-deficient retina.
abstract: In the vertebrate retina, the Otx2 transcription factor plays a crucial role in the cell fate determination of both rod and cone photoreceptors. We previously reported that Otx2 conditional knockout (CKO) mice exhibited a total absence of rods and cones in the retina due to their cell fate conversion to amacrine-like cells. In order to investigate the entire transcriptome of the Otx2 CKO retina, we compared expression profile of Otx2 CKO and wild-type retinas at P1 and P12 using microarray. We observed that expression of 101- and 1049-probe sets significantly decreased in the Otx2 CKO retina at P1 and P12, respectively, whereas, expression of 3- and 4149-probe sets increased at P1 and P12, respectively. We found that expression of genes encoding transcription factors involved in photoreceptor development, including Crx, Nrl, Nr2e3, Esrrb, and NeuroD, was markedly down-regulated in the Otx2 CKO at both P1 and P12. Furthermore, we identified three human retinal disease loci mapped in close proximity to certain down-regulated genes in the Otx2 CKO retina including Ccdc126, Tnfsf13 and Pitpnm1, suggesting that these genes are possibly responsible for these diseases. These transcriptome data sets of the Otx2 CKO retina provide a resource on developing rods and cones to further understand the molecular mechanisms underlying photoreceptor development, function and disease.
authors: Department of Developmental Biology, Osaka Bioscience Institute, Osaka, Japan.
authors: Yoshihiro
authors: Y
authors: Omori
authors: Kimiko
authors: K
authors: Katoh
authors: Shigeru
authors: S
authors: Sato
authors: Yuki
authors: Y
authors: Muranishi
authors: Taro
authors: T
authors: Chaya
authors: Akishi
authors: A
authors: Onishi
authors: Takashi
authors: T
authors: Minami
authors: Takashi
authors: T
authors: Fujikado
authors: Takahisa
authors: T
authors: Furukawa
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