Data/hora: 09/06/2024 16:43:44

Provedor de dados: 	45	
País: 	Brazil	
Título: 	Effect of insulin-like growth factor-1 during in vitro oocyte maturation and in vitro culture of bovine embryos	
Autores: 	Quetglas,M.D.; Coelho,L.A.; Garcia,J.M.; Oliveira Filho,E.B.; Esper,C.R.	
Data: 	2001-04-01	
Ano: 	2001	
Palavras-chave: 	Bovine; Cleavage rate; IGF-I; In vitro maturation; In vitro fertilization.	
Resumo: 	The effects of insulin-like growth factor-I (IGF-I) on in vitro maturation (IVM) (experiment I) and on in vitro embryo development (experiment II) of bovine oocytes fertilized in vitro, were evaluated in terms of cleavage (CR), blastocyst (BR) and hatching (HR) rates. For IVM, immature cumulus-oocyte complexes were cultured in TCM-199 medium supplemented with Hepes, sodium bicarbonate, sodium pyruvate, additives, fetal calf serum (B-199 medium) and gonadotropins (14 U/ml PMSG and 7 U/ml hCG). For embryo development, the oocytes/zygotes were cultured in B-199 medium with bovine oviduct epithelial cells in suspension under silicon oil. Treatments for in vitro culture conditions for both experiments were: 1- B-199 + 200 ng/ml IGF-I; 2- B-199 + 100 ng/ml IGF-I; 3- B-199 + 50 ng/ml IGF-I; 4- B-199 + 10 ng/ml IGF-I; 5- B-199 + 0 ng/ml IGF-I. All cultures were performed at 38.5ºC in 5% CO2 in air and the data were analyzed by chi-square test. In experiment I, there were no differences (P&gt;0.05) among treatments for CR, BR or HR. In experiment II, the addition of IGF-I to the embryo culture medium (ECM) resulted in a significant increase in CR while for BR and HR this effect was not observed. The addition of 200 ng/ml IGF-I to ECM increased CR (71.1%) when compared to 100 ng/ml IGF-I (57.6%) or control (56.7%) groups, however, there were no differences when compared to 50 (69.4%) or 10 ng/ml (73.1%) groups. There was no beneficial effect of the addition of IGF-I in the IVM or ECM media on the in vitro development of embryos produced from oocytes matured and fertilized in vitro.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352001000200014	
Editor: 	Universidade Federal de Minas Gerais, Escola de Veterinária	
Relação: 	10.1590/S0102-09352001000200014	
Formato: 	text/html	
Fonte: 	Arquivo Brasileiro de Medicina Veterinária e Zootecnia  v.53 n.2 2001	
Fonte: 	info:eu-repo/semantics/openAccess