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

Growth hormone preferentially induces the rapid, transient expression of SOCS-3, a novel inhibitor of cytokine receptor signaling.

Four members ( SOCS-1, SOCS-2, SOCS-3, and CIS) of a family of cytokine-inducible, negative regulators of cytokine receptor signaling have recently been identified. To address whether any of these genes are induced in response to growth hormone (GH), serum-starved 3T3-F442A fibroblasts were incubated with GH for various time points, and the expression of the SOCS gene family was analyzed by Northern blotting. GH stimulated the rapid, transient induction of SOCS-3 mRNA, peaking 30 min after the initiation of GH exposure and declining to basal levels by 2 h. Expression of the other SOCS genes ( SOCS-1, SOCS-2, CIS) was also up-regulated by GH, although to a lesser extent than SOCS-3 and with differing kinetics. SOCS-3 expression was also strongly induced in 3T3-F442A cells treated with leukemia-inhibitory factor (LIF), with weaker induction of SOCS-1 and CIS being observed. The preferential induction of SOCS-3 mRNA was also observed in hepatic RNA isolated from the livers of mice that had received a single supraphysiological dose of GH intraperitoneally. Co-transfection studies revealed that constitutive expression of SOCS-1 and SOCS-3, but not SOCS-2 or CIS, blocked GH- induced transactivation of the GH-responsive serine protease inhibitor 2.1 gene promoter.[1]

References

  1. Growth hormone preferentially induces the rapid, transient expression of SOCS-3, a novel inhibitor of cytokine receptor signaling. Adams, T.E., Hansen, J.A., Starr, R., Nicola, N.A., Hilton, D.J., Billestrup, N. J. Biol. Chem. (1998) [Pubmed]
 
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