The proliferative and apoptotic activities of E2F1 in the mouse retina

Suh Chin J. Lin, Stephen X. Skapek, David S. Papermaster, Mark Hankin, Eva Y.H.P. Lee

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The E2F1 transcription factor controls cell proliferation and apoptosis. E2F1 activity is negatively regulated by the retinoblastoma (RB) protein. To study how inactivation of Rb and dysregulated E2F1 affects the developing retina, we analysed wild-type and Rb-/- embryonic retinas and retinal transplants and we established transgenic mice expressing human E2F1 in retinal photoreceptor cells under the regulation of the IRBP promoter (TgIRBPE2F1). A marked increase in cell proliferation and apoptosis was observed in the retinas of Rb-/- mice and TgIRBPE2F1 transgenic mice. In the transgenic mice, photoreceptor cells formed rosette-like arrangements at postnatal days 9 through 28. Complete loss of photoreceptors followed in the TgIRBPE2F1 mice but not in the Rb-/- retinal transplants. Both RB-deficient and E2F1-overexpressing photoreceptor cells expressed rhodopsin, a marker of terminal differentiation. Loss of p53 partially reduced the apoptosis and resulted in transient hyperplasia of multiple cell types in the TgIRBPE2F1 retinas at postnatal day 6. Our findings support the concept that cross-talk occurs between different retinal cell types and that multiple genetic pathways must become dysregulated for the full oncogenic transformation of neuronal retinal cells.

Original languageEnglish (US)
Pages (from-to)7073-7084
Number of pages12
JournalOncogene
Volume20
Issue number48
DOIs
StatePublished - Oct 25 2001
Externally publishedYes

Fingerprint

Retina
Transgenic Mice
Photoreceptor Cells
Apoptosis
E2F1 Transcription Factor
Cell Proliferation
Transplants
Retinoblastoma Protein
Vertebrate Photoreceptor Cells
Rhodopsin
Retinoblastoma
Differentiation Antigens
Hyperplasia

Keywords

  • E2F1
  • p53
  • RB and retinoblastoma

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Cancer Research

Cite this

Lin, S. C. J., Skapek, S. X., Papermaster, D. S., Hankin, M., & Lee, E. Y. H. P. (2001). The proliferative and apoptotic activities of E2F1 in the mouse retina. Oncogene, 20(48), 7073-7084. https://doi.org/10.1038/sj.onc.1204932

The proliferative and apoptotic activities of E2F1 in the mouse retina. / Lin, Suh Chin J.; Skapek, Stephen X.; Papermaster, David S.; Hankin, Mark; Lee, Eva Y.H.P.

In: Oncogene, Vol. 20, No. 48, 25.10.2001, p. 7073-7084.

Research output: Contribution to journalArticle

Lin, SCJ, Skapek, SX, Papermaster, DS, Hankin, M & Lee, EYHP 2001, 'The proliferative and apoptotic activities of E2F1 in the mouse retina', Oncogene, vol. 20, no. 48, pp. 7073-7084. https://doi.org/10.1038/sj.onc.1204932
Lin, Suh Chin J. ; Skapek, Stephen X. ; Papermaster, David S. ; Hankin, Mark ; Lee, Eva Y.H.P. / The proliferative and apoptotic activities of E2F1 in the mouse retina. In: Oncogene. 2001 ; Vol. 20, No. 48. pp. 7073-7084.
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