Porcine oocytes denuded before maturation can develop to the blastocyst stage if provided a cumulous cell-derived coculture system.
J Anim Sci
; 88(8): 2604-10, 2010 Aug.
Article
em En
| MEDLINE
| ID: mdl-20382876
ABSTRACT
The physiological role of cumulus cells (CC) surrounding oocytes is particularly important for normal cytoplasmic maturation of oocytes. However, removal of CC from oocytes is inevitable for some embryo manipulation techniques, such as germinal vesicle (GV) transfer, somatic cell haploidization, and oocyte cryopreservation. The present study was designed to determine an optimal method to culture porcine denuded oocytes (DO). The results indicated CC from cumulus-oocyte complexes at the GV stage (GVCC) or at the metaphase II stage, and mural granulosa cells could not improve the maturation of DO. However, GVCC could enhance the development of matured porcine DO after fertilization; the percentage of blastocysts was increased from 1.1 to 17.2% (P < 0.05), and the relative value of the x-axis and y-axis of spindles was also increased (P < 0.05). Coculture with GVCC had no effect on the distribution of mitochondria and cortical granules. The results contribute to our understanding of the mechanisms by which CC promote oocyte maturation and contribute to optimization of protocols for in vitro maturation of DO.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Oócitos
/
Blastocisto
/
Células do Cúmulo
Limite:
Animals
Idioma:
En
Revista:
J Anim Sci
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Estados Unidos