Selection of pre- versus postpubertal pig oocytes for parthenogenetic activation and somatic cell nuclear transfer.
Reprod Fertil Dev
; 27(3): 544-50, 2015 Mar.
Article
em En
| MEDLINE
| ID: mdl-25482407
ABSTRACT
Pig oocytes have been used increasingly for in vitro production techniques in recent years. The slaughterhouse-derived oocytes that are often used are mostly of prepubertal origin. The aims of the present study were to compare the developmental competence between pre- and postpubertal pig oocytes, and to develop a simple and practical method for the selection of prepubertal pig oocytes for parthenogenetic activation (PA) and somatic cell nuclear transfer (SCNT) based on oocyte morphology after IVM and oocyte inside zona pellucida (ZP) diameter ('small' ≤110µm; 'medium' >110µm; 'large' ≥120µm). Meiotic competence and blastocyst rates after PA and SCNT of prepubertal oocytes increased with oocyte size, with the large prepubertal oocytes reaching a level similar to postpubertal oocytes after SCNT. Blastocyst cell number was not related to oocyte inside ZP diameter and oocyte donor to the same extent as blastocyst rate. Very low blastocyst rates were obtained after PA of morphologically bad pre- and postpubertal oocytes. In conclusion, measurement of inside ZP diameter combined with morphological selection is useful to remove incompetent oocytes. Further studies are needed to clarify the relative importance of cytoplasmic volume and stage in oocyte growth phase.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Oócitos
/
Oogênese
/
Partenogênese
/
Técnicas de Transferência Nuclear
/
Meiose
Limite:
Animals
Idioma:
En
Revista:
Reprod Fertil Dev
Assunto da revista:
MEDICINA REPRODUTIVA
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Dinamarca