Korean J Obstet Gynecol.  2003 Mar;46(3):592-599.

Influence of Activin and Follistatin on Expression of Insulin-like Growth Factor (IGF)-I, II, Insulin-like Growth Factor Binding Protein (IGFBP)-1, 2, and 3 mRNA in Cultured Mouse Granulosa Cells

• Chae HD
• Hong SH
• Cho YH
• Oh YM
• Lee BH
• Kim SH
• Kim CH
• Kang BM

Abstract

OBJECTIVE
To investigate the influence of activin and follistatin on the expression of IGF (insulin-like growth factor)-I, II, IGFBP (insulin-like growth factor binding protein)-1, 2, and 3 mRNA in cultured mouse granulosa cells
MATERIALS AND METHODS
The granulosa cells were obtained from the mouse and cultured for 6 days with 10 ng/ml of activin, 10 ng/ml of follistatin, and 10 ng/ml of activin with 10 ng/m of follistatin, respectively. The cells not treated with activin or follistatin served as control. Reverse transcription-polymerase chain reaction (RT-PCR) has been used to examine the expression of IGF-I, II, IGFBP-1, 2, and 3 mRNA. Results were analyzed with Kolmogorov-Smirnov test and analysis of variance (ANOVA) and statistical significance was defined as p<0.05.
RESULTS
The expression of IGF-I and II mRNA were not different significantly. However, the expression of IGFBP-3 mRNA was significantly increased in the follistatin group compared to the control group (p<0.05) and significantly decreased in the activin with follistatin group compared to the control group (p<0.05). The expression of IGFBP-1 mRNA was seemed to be increased in the activin group and decreased in the follistatin group compared to the control group, respectively (p=0.07, p=0.07). The expression of IGFBP-2 and 3 mRNA were seemed to be decreased in the activin group compared to the control group (p=0.06, p=0.07, respectively).
CONCLUSION
Activin and follistatin might play a role as regulators of mouse ovarian physiology by modulating the IGF system, especially IGFBPs.

Keyword

Activin; Follistatin; Insulin-like growth factor system; Cultured mouse granulosa cells

MeSH Terms

Activins*
Animals
Carrier Proteins*
Female
Follistatin*
Granulosa Cells*
Insulin-Like Growth Factor Binding Protein 1
Insulin-Like Growth Factor Binding Protein 2
Insulin-Like Growth Factor Binding Protein 3
Insulin-Like Growth Factor Binding Proteins
Insulin-Like Growth Factor I
Mice*
Physiology
RNA, Messenger*
Activins
Carrier Proteins
Follistatin
Insulin-Like Growth Factor Binding Protein 1
Insulin-Like Growth Factor Binding Protein 2
Insulin-Like Growth Factor Binding Protein 3
Insulin-Like Growth Factor Binding Proteins
Insulin-Like Growth Factor I
RNA, Messenger