Yuk Fai Leung1, Ping Ma, John E Dowling. 1. Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts 02138, USA. yfleung@mcb.harvard.edu
Abstract
PURPOSE: Eye development and photoreceptor maintenance is dependent on the retinal pigment epithelium (RPE), a thin layer of cells that underlies the neural retina. Despite its importance, development of RPE has not been studied by a genomic approach. In this study, a microarray expression-profiling methodology was established for studying RPE development. METHODS: The intact retina with RPE attached was dissected from developing embryos, and differentially expressed genes in RPE were inferred by comparing the dissected tissues with retinas without RPE, in microarray and statistical analyses. RESULTS: Of the probesets used, 8810 were significantly expressed in RPE at 52 hours postfertilization (hpf), of which 1443 may have biologically meaningful expression levels. Further, 78 and 988 probesets were found to be significantly over- or underexpressed in RPE, respectively, compared with retina. Also, 79.2% (38/48) of the known overexpressed probesets were independently validated as RPE-related transcripts. CONCLUSIONS: The results strongly suggest that this methodology can obtain in vivo RPE-specific gene expression from the zebrafish embryos and identify novel RPE markers.
PURPOSE: Eye development and photoreceptor maintenance is dependent on the retinal pigment epithelium (RPE), a thin layer of cells that underlies the neural retina. Despite its importance, development of RPE has not been studied by a genomic approach. In this study, a microarray expression-profiling methodology was established for studying RPE development. METHODS: The intact retina with RPE attached was dissected from developing embryos, and differentially expressed genes in RPE were inferred by comparing the dissected tissues with retinas without RPE, in microarray and statistical analyses. RESULTS: Of the probesets used, 8810 were significantly expressed in RPE at 52 hours postfertilization (hpf), of which 1443 may have biologically meaningful expression levels. Further, 78 and 988 probesets were found to be significantly over- or underexpressed in RPE, respectively, compared with retina. Also, 79.2% (38/48) of the known overexpressed probesets were independently validated as RPE-related transcripts. CONCLUSIONS: The results strongly suggest that this methodology can obtain in vivo RPE-specific gene expression from the zebrafish embryos and identify novel RPE markers.
Authors: Elva Díaz; Yee Hwa Yang; Todd Ferreira; Kenneth C Loh; Yasushi Okazaki; Yoshihide Hayashizaki; Marc Tessier-Lavigne; Terence P Speed; John Ngai Journal: Proc Natl Acad Sci U S A Date: 2003-04-17 Impact factor: 11.205
Authors: Ronald G Gregg; Gregory B Willer; James M Fadool; John E Dowling; Brian A Link Journal: Proc Natl Acad Sci U S A Date: 2003-05-14 Impact factor: 11.205
Authors: R N Van Gelder; M E von Zastrow; A Yool; W C Dement; J D Barchas; J H Eberwine Journal: Proc Natl Acad Sci U S A Date: 1990-03 Impact factor: 11.205