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Schimmer, B.P. et al.

Bernard P. Schimmer, Jennivine Tsao, Martha Cordova, Sara Mostafavi, Quaid Morris, Joshua O. Scheys,

Contributions of steroidogenic factor 1 to the transcription landscape of Y1 mouse adrenocortical tumor cells.

The contribution of steroidogenic factor 1 (SF-1) to the gene expression profile of Y1 mouse adrenocortical cells was evaluated using short hairpin RNAs to knockdown SF-1. The reduced level of SF-1 RNA was associated with global changes that affected the accumulation of more than 2000 transcripts. Among the down-regulated transcripts were several with functions in steroidogenesis that were affected to different degrees--i.e., Mc2r>Scarb1>Star≥Hsd3b1>Cyp11b1. For Star and Cyp11b1, the different levels of expression correlated with the amount of residual SF-1 bound to the proximal promoter regions. The knockdown of SF-1 did not affect the accumulation of Cyp11a1 transcripts even though the amount of SF-1 bound to the proximal promoter of the gene was reduced to background levels. Our results indicate that transcripts with functions in steroidogenesis vary in their dependence on SF-1 for constitutive expression. On a more global scale, SF-1 knockdown affects the accumulation of a large number of transcripts, most of which are not recognizably involved in steroid hormone biosynthesis.[1]

References

Contributions of steroidogenic factor 1 to the transcription landscape of Y1 mouse adrenocortical tumor cells. Schimmer, B.P., Tsao, J., Cordova, M., Mostafavi, S., Morris, Q., Scheys, J.O. Mol. Cell. Endocrinol. (2011) [Pubmed]

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