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

Cyclin A2 and c-myc mRNA expression in ethinyl estradiol induced liver proliferation.

The time-course of c-myc and cyclin A2 mRNA expression was determined in the liver of male Sprague-Dawley rats during transient liver cell proliferation induced by a single dose of ethinyl estradiol (EE), and was compared to that during liver regeneration following two-thirds hepatectomy (PH). Cell proliferation was assessed in terms of 5'-bromodeoxyuridine (BrdU) labeling. EE administration and PH both increased BrdU labeling between 18 and 48 h, with peak values at 18 and 24 h. An early (2 h) increase in BrdU labeling was observed after EE but not PH. Maximal increases in cyclin A2 mRNA levels and BrdU labeling coincided after both EE and PH, and cyclin A2 mRNA expression was proportional to the intensity of the proliferative response. In contrast, the degree of c-myc mRNA expression was similar after EE administration and PH, but the time course was different: c-myc gene expression rose concomitantly with DNA replication after EE, while after PH it increased during the prereplicative phase. This indicates that the pattern of c-myc gene expression in the liver is strongly related to the type of proliferative response.[1]

References

  1. Cyclin A2 and c-myc mRNA expression in ethinyl estradiol induced liver proliferation. Payraudeau, V., Sarsat, J.P., Sobczak, J., Bréchot, C., Albaladéjo, V. Mol. Cell. Endocrinol. (1998) [Pubmed]
 
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