May 2007
Volume 48, Issue 13
ARVO Annual Meeting Abstract  |   May 2007
Microarray Analysis of Gene Expression in Transplanted Retinal Progenitor Cells
Author Affiliations & Notes
  • L. A. Kim
    Ophthalmology, Doheny Eye Institute, Los Angeles, California
  • Z. Chen
    Ophthalmology, Doheny Eye Institute, Los Angeles, California
  • M. J. Seiler
    Ophthalmology, Doheny Eye Institute, Los Angeles, California
  • R. B. Aramant
    Anatomical Science and Neurobiology, University of Louisville, Louisville, Kentucky
  • D. Mock
    Gene Array Facility, CHLA-USC, Los Angeles, California
  • S. R. Sadda
    Ophthalmology, Doheny Eye Institute, Los Angeles, California
  • Footnotes
    Commercial Relationships L.A. Kim, None; Z. Chen, None; M.J. Seiler, Ocular Transplantation LLC, P; R.B. Aramant, Ocular Transplantation LLC, E; Ocular Transplantation LLC, P; D. Mock, None; S.R. Sadda, None.
  • Footnotes
    Support Foundation Fighting Blindness; Private Funds, Foundation for Retinal Research, Fletcher Jones Foundation, Walsh Stem Cell Foundation, NIH EY03040.
Investigative Ophthalmology & Visual Science May 2007, Vol.48, 5090. doi:
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    • Get Citation

      L. A. Kim, Z. Chen, M. J. Seiler, R. B. Aramant, D. Mock, S. R. Sadda; Microarray Analysis of Gene Expression in Transplanted Retinal Progenitor Cells. Invest. Ophthalmol. Vis. Sci. 2007;48(13):5090.

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      © ARVO (1962-2015); The Authors (2016-present)

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Purpose:: To examine the gene expression patterns of retinal progenitor cells (RPCs) transplanted to S334ter-line-3 (line-3) rats, a transgenic model of retinal photoreceptor degeneration, in comparison with the photoreceptor layer of normal donor hPAP/GFP rats.

Methods:: Retinal tissue derived from embryonic day 19 (E19) hPAP/GFP rats was placed within the subretinal space of 27-31 day old line-3 rats. Using a Zeiss/P.A.L.M. laser microdissection system, the photoreceptor layer of a 388 day old hPAP/GFP rat and transplanted layers of RPCs from 258-339 day old transplanted line-3 rats were harvested. Total RNA was purified (RNeasy Micro Kit, Qiagen, Valencia, Ca). cDNA was produced after amplification of total RNA and subsequently labeled with biotin for microarray analysis (Ovation System, Nugen, San Carlos, Ca). Gene expression profiles were generated for transplanted RPCs and the hPAP/GFP control with a rat genome (28,757 functional genes) microarray (Rat Genome 230 2.0 Array, Affymetrix Inc., Santa Clara, Ca). Data analysis was performed using the S-score algorithm to determine statistical significance. The Gene Ontology Database was used to determine the biological significance of a selection of differentially expressed genes.

Results:: Setting a p-value < 10-5, which represents the highest level of stringency, 213 genes or probe sets were selected. The following biological processes were overly represented in the differentially expressed group of genes: (1) detection of light stimulus; (2) detection of external stimulus; (3) detection of abiotic stimulus; (4) response to light stimulus; (5) response to radiation. Some of the genes that were differentially expressed include: glutamate receptor (GRIA2), cadherin 11 (CDH11), retinal outer segment membrane protein 1 (ROM1), retinal degeneration slow (RDS), retinol dehydrogenase 11 (RDH11). Notch homolog 2 (NOTCH2).

Conclusions:: Differences in gene expression between transplanted retinal progenitor cells and normal photoreceptors suggest that specific biological processes differ between RPCs and photoreceptors.

Keywords: retina • gene/expression • gene microarray 

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