PMID: 9530505Apr 8, 1998Paper

Inductions of immediate early genes (IEGS) and ref-1 by human chorionic gonadotropin in murine Leydig cell line (MA-10)

Biochemistry and Molecular Biology International
S SuzukiH Seo

Abstract

The effect of human chorionic gonadotropin (hCG) on the expression of immediate early genes (IEGs) including all members of fos and jun family, and c-myc was studied using mouse Leydig cell line (MA-10 cells) by Northern blot analyses. In addition, the induction of ref-1 which enhances DNA binding of fos/jun proteins was also analyzed. HCG induced a rapid and transient expression of c-fos, fosB, c-jun, junB, junD and c-myc with a peak at 30 min to 1 h. In contrast, induction of fra-1 mRNA was delayed with a peak at 3 hr. However, fra-2 mRNA was immediately increased by hCG with a peak at 1 h. The ref-1 mRNA was expressed before the stimulation and its level was not altered by hCG at least for 8 hr. The differential induction of IEGs and continuous expression of ref-1 mRNA suggest an important role of their gene products on the regulation of Leydig cell function by hCG.

Citations

Oct 6, 2000·Mutation Research·A R EvansM R Kelley
Feb 12, 2005·Antioxidants & Redox Signaling·Gianluca TellMark R Kelley
Jun 11, 1999·The Journal of Biological Chemistry·M M MonickG W Hunninghake

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