Development of porcine embryos in vivo and in vitro; evidence for embryo 'cross talk' in vitro

被引:71
|
作者
Stokes, PJ [1 ]
Abeydeera, LR [1 ]
Leese, HJ [1 ]
机构
[1] Univ York, Dept Biol, Area 3, York YO10 5YW, N Yorkshire, England
基金
英国生物技术与生命科学研究理事会;
关键词
porcine; preimplantation; embryos; culture; autocrine/paracrine;
D O I
10.1016/j.ydbio.2005.05.001
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
The in vitro development of zygotes of domestic species to the blastocyst stage is facilitated by culture in groups, suggesting a role for autocrine/paracrine factors. A novel method was used to investigate the potential role of such factors using in-vitro-produced and in-vivo-derived porcine embryos. The development of individual zygotes to the blastocyst stage was optimal when they were cultured 81-160 mu m apart. As the distance between the embryos was increased, blastocyst rates declined significantly, reaching zero beyond 640 mu m. Blastocyst volume and cell number (both inner cell mass and trophectoderm) were also increased when the distance apart was between 81 and 160 mu m. Culturing embryos in groups at different stages of development suggested that group culture confers a greater advantage to development after the activation of the genome. Group culture of in-vivo-derived embryos showed a weak distance effect. The results suggest a role for as yet unknown diffusible paracrine/autocrine factors released by early porcine embryos in promoting the growth of neighbouring embryos in vitro. This advantage is observed to a lesser extent by in-vivo-derived zygotes which are likely to have been better conditioned for development in vitro by being conceived in the female reproductive tract. (c) 2005 Elsevier Inc. All rights reserved.
引用
收藏
页码:62 / 71
页数:10
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