Altered microfilament dynamics contribute to the formation of diploid metaphase spindles in porcine oocytes which fail to reach the metaphase-II stage during in vitro maturation.

Altered microfilament dynamics contribute to the formation of diploid metaphase spindles in porcine oocytes which fail to reach the metaphase-II stage during in vitro maturation.
复制标题

改变的微丝动力学有助于猪卵母细胞中二倍体中期纺锤体的形成,而在体外成熟过程中未能达到中期II阶段。

DOI:
10.1111/asj.13690
复制
发表时间:
2022
影响因子:
2
通讯作者:
Kikuchi K.
Kikuchi K.
中科院分区:
农林科学3区
文献类型:
--
作者:
Somfai T;Dang-Nguyen TQ ;Kikuchi K.

文献摘要

参考文献

相似文献

猪卵母细胞体外成熟(IVM)过程中,成熟囊泡破裂后减数分裂提前停滞与微丝降解有关。我们的目的是澄清(1)这种停滞是否发生在中期I(MI)阶段或卵母细胞进展到所谓的二倍体中期II(MII)阶段,以及(2)微丝降解是否是减数分裂停滞的原因或结果。在44 h IVM时显示减数分裂提前停滞的卵母细胞(38个单价体)的染色体数量和形态与在肌动蛋白聚合抑制剂细胞松弛素-B存在下培养的卵母细胞相似,但分别与IVM 33和44 h时MI期(19个二价体)和MII期卵母细胞(19个单价体)的染色体数量和形态不同。免疫染色显示,在过早停滞和细胞松弛素B处理的卵母细胞中,微丝降解的频率相似(分别为58.7%和57.2%),高于MI和MII期卵母细胞(分别为10.6%和6.8%)(P< 0.05)。诺考达唑诱导MI-阻滞不影响微丝形态。各组卵母细胞中微丝相关基因的ATP和mRNA水平相似。这些结果表明,改变的微丝动力学有助于卵母细胞中二倍体中期纺锤体的形成,而这些纺锤体未能达到MII期。然而,微丝变性的原因仍不清楚。
Premature meiotic arrest during in vitro maturation (IVM) of porcine oocytes after germinal vesicle breakdown is associated with microfilament degradation. We aimed to clarify (1) if such arrest occurs at the metaphase‐I (MI) stage or the oocyte progresses to a so‐called diploid metaphase‐II (MII) stage and (2) if microfilament degradation is the cause or result of the meiotic arrest. The number and morphology of chromosomes in oocytes showing premature meiotic arrest at 44 h IVM (38 monovalents) was similar to those cultured in the presence of the actin polymerization‐inhibitor cytochalasin‐B, but different from those of MI‐stage (19 bivalents), and MII‐stage oocytes (19 monovalents) at 33 and 44 h of IVM, respectively. Immunostaining revealed similar frequencies of microfilament degradation in prematurely arrested and cytochalasin‐B‐treated oocytes (58.7% and 57.2%, respectively), which were higher (P< 0.05) than those in MI‐ and MII‐stage oocytes (10.6% and 6.8%, respectively). Induction of MI‐arrest by nocodazole did not affect microfilament morphology. ATP and mRNA levels of microfilament‐related genes in oocytes were similar among all groups. These results suggest that altered microfilament dynamics contribute to the formation of diploid metaphase spindles in oocytes, which fail to reach the MII stage. However, the cause of microfilament degeneration remains unclear.
体外成熟和受精产生的异常猪胚胎的外观、命运和利用。
DOI: --
发表时间: 2020
期刊: Society of Reproduction and Fertility supplement
影响因子: --
作者:
K. Kikuchi;T. Somfai;M. Nakai;T. Nagai
通讯作者: T. Nagai
ATP 耗尽后应力纤维重组。
DOI: 10.1002/cm.970080204
发表时间: 1987
影响因子: --
作者:
GlascottJr,PA;McSorley,KM;Mittal,B;Sanger,JM;Sanger,JW
通讯作者: Sanger,JW
DOI: --
发表时间: 1989
期刊: Biochimica et Biophysica Acta
影响因子: --
作者:
F. B. Straub;G. Feuer
通讯作者: G. Feuer
卵母细胞体外成熟过程中抑制第一极体挤出产生的二倍体猪单性动物
DOI: --
发表时间: 2006
期刊: Reproduction 132(4)
影响因子: --
作者:
Somfai;et al.
通讯作者: et al.
三种肌动蛋白丝束对细胞 ATP 水平消耗的不同反应。
DOI: --
发表时间: 1983
影响因子: 6.6
作者:
Sanger,JW;Sanger,JM;Jockusch,BM
通讯作者: Jockusch,BM