Evolution of the acquisition offertilization competence and polyspermy blocks during meiotic maturation
Evolution of the acquisition offertilization competence and polyspermy blocks during meiotic maturation
复制标题
减数分裂成熟过程中受精能力的获得和多精受精块的演变
DOI：
10.1002/mrd.21378
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
K
中科院分区：
文献类型：
--
作者：
Chiba;K
在许多动物中，完全生长的卵母细胞在减数分裂 I 前期停滞。在排卵/产卵之前或之后，二次停滞发生在减数分裂 I 或 II（分别为 MI 或 II）中期。卵巢中的 MI 停滞在产卵后释放，然后受精，而排卵后 MI 和 MII 停滞则通过受精释放。在不适当的时间对来自卵巢的分离卵母细胞进行授精会增加多精受精率，这表明卵巢为多精受精块的获得和正常受精能力的发展提供了适当的环境。由于排卵/产卵后卵巢发生 MI 停滞或 MI/MII 停滞，受精期可能会延长。因此，MI 和 MII 停滞可能在维持细胞周期阶段以实现正常受精方面发挥作用。在这里，讨论了受精时间的演变。摩尔。重现。开发。 78:808–813, 2011。© 2011 Wiley periodicals, Inc.
In many animals, fully grown oocytes are arrested at prophase of meiosis I. Before or after ovulation/spawning, a secondary arrest occurs at metaphase of meiosis I or II (MI or II, respectively). MI arrest in the ovary is released after spawning, and is followed by fertilization, whereas MI and MII arrest after ovulation are released by fertilization. Insemination of isolated oocytes from the ovaries at an inappropriate time increases the rate of polyspermy, indicating that ovaries provide the proper environment for acquisition of the polyspermy blocks and the development of competence to be fertilized normally. Due to MI arrest in the ovaries or MI/MII arrest after ovulation/spawning, the fertilizable period can be elongated. Thus, MI and MII arrest may play a role in maintaining the cell‐cycle phases to enable normal fertilization. Here, the evolution of fertilization timing is discussed. Mol. Reprod. Dev. 78:808–813, 2011. © 2011 Wiley Periodicals, Inc.