Effect of growth factors on in vitro development of caprine preantral follicle oocytes.
The objective of this work was to examine the effect of various growth factors including epidermal growth factor (EGF) and insulin-like growth factor-I (IGF-I), either individually or in association, in the presence of follicle stimulating hormone (FSH) on the in vitro growth and viability of caprine preantral follicle oocytes. Preantral follicles were disassociated enzymatically and mechanically from prepuberal caprine ovaries after the animals were anesthetically ovariectomized. In experiment, caprine preantral follicles in groups 1-4 were cultured in growth culture medium, growth culture medium+EGF, growth culture medium+IGF-I and growth culture medium+IGF-I+EGF, respectively, for 9 days. The results indicated that EGF (50 mg/l) increased the survival rate of oocytes, but decreased the growth rate of oocytes; IGF-I (100 mg/l) effectively maintained the survival of oocytes and stimulated their growth; IGF-I (100 mg/l) and EGF (50mg/l) in combination produced a higher effect on both of the survival and the growth rate of oocytes than IGF-I or EGF alone. Conclusively, the growth factors can effectively maintain the survival of caprine preantral follicle oocytes and regulated their growth in culture. EGF and IGF-I in association could synergically meliorate the culture system of caprine preantral follicle oocytes.
Zhou
Huanmin
H
College of Bioengineering, Inner Mongolia Agricultural University, No. 306, Zhao Wu Da Street, Hohhot 010018, Inner Mongolia, PR China. huanminzhou@263.net
Zhang
Yong
Y
D000818:Animals; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D004357:Drug Synergism; D004815:Epidermal Growth Factor / Q000494:pharmacology; D005260:Female; D005640:Follicle Stimulating Hormone / Q000494:pharmacology; D006041:Goats; D006133:Growth Substances / Q000494:pharmacology*; D007334:Insulin-Like Growth Factor I / Q000494:pharmacology; D009865:Oocytes / Q000187:drug effects* / Q000254:growth & development*; D006080:Ovarian Follicle / Q000166:cytology*; D010052:Ovariectomy / Q000662:veterinary
D006133:Growth Substances; D004815:Epidermal Growth Factor; D007334:Insulin-Like Growth Factor I; D005640:Follicle Stimulating Hormone