 |
|
|
|
Year 2010 - Volume 30, Number 4
|
|
Effect of Bone Morphogenetic Protein-7 (BMP-7) on in vitro survival of caprine preantral follicles, 30(4):305-310
|
ABSTRACT.- Araújo V.R., Silva C.M.G., Magalhães D.M., Silva G.M., Báo S.N., Silva J.R.V., Figueiredo J.R. & Rodrigues A.P.R. 2010. Effect of Bone Morphogenetic Protein-7 (BMP-7) on in vitro survival of caprine preantral follicles. Pesquisa Veterinária Brasileira 30(4):305-310. Programa de Pós-Graduação em Ciências Veterinárias, Laboratório de Manipulação de Oócitos e Folículos Pré-Antrais, Universidade Estadual do Ceará, Av. Paranjana 1700, Campus do Itaperi, Fortaleza, CE 60740-000, Brazil. E-mail: val_exclusiva@yahoo.com.br
This study was conducted in order to verify the effect of different concentrations of BMP-7 in the in vitro survival and development of caprine preantral follicles. Fragments of caprine ovarian cortical tissue were cultured for 1 or 7 days in Minimum Essential Medium (MEM+) supplemented with different concentrations of BMP-7 (1, 10, 50 or 100ng/ml). Non-cultured fragments or those cultured for 1 or 7 days were processed for classical histology and transmission electron microscopy (TEM). Parameters such as follicular survival, activation and growth were evaluated. The results showed that, after 1 or 7 days of culture, the percentage of morphologically normal follicles was significantly reduced in all treatments when compared with fresh control, except at 1ng/ml of BMP-7 for 1 day. In addition, the concentration of 10ng/ml of BMP-7 significantly increases follicular diameter from day 1 to 7 of culture. There was no influence of the other concentrations of BMP-7 regarding to the follicular and oocyte diameter. Ultrastructure studies confirmed follicular integrity after 7 days of culture in 1ng/ml BMP-7. In conclusion, small concentrations of BMP-7 can improve the survival and growth of caprine preantral follicles during in vitro culture. |
| |
|
|
| |
|
|
