Data/hora: 27/07/2024 02:04:26

Provedor de dados: 	65	
País: 	Brazil	
Título: 	Goat ovarian follicles express different levels of mRNA for inhibin-ßA subunit and activin-A stimulates secondary follicle growth in vitro	
Autores: 	Leitão,Cintia Camurça Fernandes; Costa,José Jackson Nascimento; Saraiva,Márcia Viviane Alves; Araújo,Valdevane Rocha; Figueiredo,José Ricardo; Hurk,Robert van den; Silva,José Roberto Viana.	
Data: 	2013-01-01	
Ano: 	2013	
Palavras-chave: 	Pre-antral follicles; Caprine; Culture; Oocyte; Antrum formation; FSH-R.	
Resumo: 	This study investigated the levels of messenger ribonucleic acids (mRNA) for inhibin-ßA subunit in goat primordial, primary and secondary follicles, as well as in cumulus-oocyte complexes (COCs) and mural granulosa / theca cells of antral follicles. The effects of activin-A (100ng mL-1) and/or follicle stimulating hormone (FSH, 50ng mL-1) on growth and expression of mRNA for activin-A and FSH receptor (FSH-R) in secondary follicles cultured for six days were evaluated. The data showed that the expression of inhibin-ßA is lower in secondary follicles than in primary follicles and is higher in large antral follicles than in small antral follicles. After culture, activin-A and/or FSH promoted growth of secondary follicles, while FSH increased the levels of mRNA for inhibin-ßA, and activin-A increased the levels of FSH-R mRNA. In conclusion, mRNA for inhibin-ßA is expressed at different levels in pre-antral and antral follicles and activin-A acts as a stimulator of the FSH-R expression in goat follicles. On its turn, the expression of inhibin-ßA is stimulated by FSH, which together with activin-A promotes secondary follicle growth in-vitro.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000100018	
Editor: 	Universidade Federal de Santa Maria	
Relação: 	10.1590/S0103-84782012005000140	
Formato: 	text/html	
Fonte: 	Ciência Rural  v.43 n.1 2013	
Fonte: 	info:eu-repo/semantics/openAccess