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
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发表时间:
2022
影响因子:
2
通讯作者:
Kikuchi K.
中科院分区:
文献类型:
--
作者:
Somfai T;Dang-Nguyen TQ ;Kikuchi K.
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.
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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
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
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.
影响因子:
6.6
作者:
Sanger,JW;Sanger,JM;Jockusch,BM
通讯作者:
Jockusch,BM