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• W1974860745 abstract "The aim of the present study was to develop a three-dimensional (3D) collagen gel culture system for the in vitro growth and survival of buffalo preantral follicles with or without growth factors. Buffalo ovaries were collected from a local abattoir and preantral follicles were isolated through microdissection. Isolated preantral follicles were put either in collagen gel coated culture dish or embedded in a microdrop of collagen gel. The culture medium was TCM-199 fortified with fetal calf serum (10%), insulin transferin selenium solution (ITS, 1%), epidermal growth factor (EGF, 20 ng/ml) and follicle stimulating hormone (FSH, 0.5 μg/ml). Follicles were divided into three groups and cultured in the medium described above (group a, control), with addition of insulin like growth factor (IGF-I, 100 ng/ml, group b), or with addition of IGF-I and basic fibroblast growth factor (bFGF, 10 ng/ml, group c). Preantral follicles were incubated at 38.5 °C in 5% CO2 and maximum humidity. Culture medium was replenished after every 72 h and spent medium was stored at −30 °C for hormone analysis. We found that the extracellular matrix of collagen gel maintained follicle viability and growth by providing surface interaction and increasing attachment of follicles. Preantral follicles embedded in collagen gel droplets had better antrum formation and development as compared to the whole surface coated culture method. Follicles cultured with IGF-I on collagen gel matrix showed a significantly (P < 0.05) higher survival rate and larger mean diameter of follicles on day 10 of culture with improved growth and mucification as compared to the control group. However, follicles cultured in the combination of IGF-I with bFGF had decreased survival rate and smaller mean follicles diameter than the IGF-I group (b). Progesterone (P4) accumulation was greater on day 9 of culture in follicles cultured in IGF-I as compared to control; whereas, P4 was markedly decreased in the combination of IGF-I with bFGF. Follicles of the control group could survive for up to 10–15 days before degenerating, but follicles cultured with growth factors were able to survive up to 20 days and showed signs of early antrum formation. In summary, we have shown that collagen gel was a novel and efficacious 3D microenvironment for the extended culture of buffalo preantral follicles. Supplementation of culture medium with growth factors was found to be essential for antrum formation." @default.
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• W1974860745 date "2009-08-01" @default.
• W1974860745 modified "2023-10-15" @default.
• W1974860745 title "Survival and developmental competence of buffalo preantral follicles using three-dimensional collagen gel culture system" @default.
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• W1974860745 doi "https://doi.org/10.1016/j.anireprosci.2008.09.009" @default.
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