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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

E2F-1- induced p53-independent apoptosis in transgenic mice.

The E2F transcription factors are key targets for the retinoblastoma protein, pRB. By inactivation of E2Fs, pRB prevents progression to the S phase. To test proliferative functions of E2F, we generated transgenic mice expressing human E2F-1 and/or human DP-1. When the hydroxymethyl glutaryl coenzyme A reductase promoter was used to express DP-1, overexpression occurred in a variety of tissues and did not confer phenotypic changes. In contrast, expression of E2F-1 from the same promoter was obtained only in testicles, in which E2F-1 overexpression caused atrophy and sterility through a process involving increased apoptosis in the germinal epithelium. This effect was potentiated by simultaneous overexpression of DP-1. Testicular atrophy as a result of overexpression of E2F-1 and DP-1 is independent of functional p53, since p53-nullizygous transgenic mice overexpressing E2F-1 and DP-1 also suffered testicular atrophy.[1]

References

  1. E2F-1-induced p53-independent apoptosis in transgenic mice. Holmberg, C., Helin, K., Sehested, M., Karlström, O. Oncogene (1998) [Pubmed]
 
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