Vitamin A-deficient testis germ cells are arrested at the end of S phase of the cell cycle: a molecular study of the origin of synchronous spermatogenesis in regenerated seminiferous tubules.

Vitamin A-deficient testis germ cells are arrested at the end of S phase of the cell cycle: a molecular study of the origin of synchronous spermatogenesis in regenerated seminiferous tubules.
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缺乏维生素 A 的睾丸生殖细胞在细胞周期 S 期末期停滞:再生生精小管中同步精子发生起源的分子研究。

DOI:
10.1095/biolreprod48.5.1157
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发表时间:
1993
影响因子:
3.6
通讯作者:
Kim,KH
Kim,KH
中科院分区:
生物学2区
文献类型:
--
作者:
Wang,Z;Kim,KH

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雄性大鼠缺乏维生素 A 会阻碍精子发生并导致高级生殖细胞的丧失。对这些大鼠进行视黄醇治疗似乎会导致由剩余的 A1 型精原细胞启动的同步精子发生。为了在分子水平上确定视黄醇处理的生殖细胞中发生的细胞周期M期的开始,测量了与cdc2激酶/细胞周期蛋白B复合物相关的H1组蛋白激酶活性。这种激酶活性是有丝分裂(M 期)的极好的分子指标,因为已知它仅在细胞周期的 G2/M 相转变和有丝分裂中期之间的大约 2 小时内保持较高水平。这种活性在维生素A缺乏的睾丸中较低,在视黄醇处理后4小时增加,并在12小时时达到15.6倍的水平。这些结果表明,维生素A缺乏的睾丸的生殖细胞在注射视黄醇后4小时左右开始进入M期,其中在12小时进入的细胞百分比最高。这些结果与将同步精子发生的起源置于细胞周期S期末的再生生精小管中是一致的。
Vitamin A deficiency in male rats arrests spermatogenesis and leads to the loss of advanced germ cells. Retinol treatment of these rats seems to result in a synchronous spermatogenesis initiated from the remaining type A1spermatogonia. To determine at a molecular level the onset of the M phase of the cell cycle occurring in the retinol-treated germ cells, the H1 histone kinase activity associated with thecdc2kinase/cyclin B complex was measured. This kinase activity is an excellent molecular indicator of mitosis (M phase) since it is known to be high only for approximately 2 h between the G2/M phase transition of the cell cycle and the metaphase of mitosis. This activity was low in vitamin A-deficient testis, increased by 4 h after retinol treatment, and reached a 15.6-fold level at 12 h. These results suggest that the germ cells of vitamin A-deficient testis begin to enter the M phase around 4 h after retinol injection, with the highest percentage of cells entering at 12 h. These results are consistent with placing the origin of synchronous spermatogenesis in regenerated seminiferous tubules at the end of the S phase of the cell cycle.
维生素 A 缺乏、维生素 E 缺乏和营养不良后睾丸损伤和修复的差异†
DOI: --
发表时间: 1933
期刊:
影响因子: --
作者:
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通讯作者: K. E. Mason
维生素 A 与大鼠生殖
DOI: --
发表时间: 1964
期刊: Proceedings of the Royal Society of London. Series B. Biological Sciences
影响因子: --
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通过大鼠体内维生素 A 的消耗和恢复实现生精同步的稳定性。
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发表时间: 1990
影响因子: 3.6
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通过修饰 p34cdc2 和细胞周期蛋白成分的磷酸化来激活 M 期特异性组蛋白 H1 激酶。
DOI: 10.1101/gad.4.1.9
发表时间: 1990
影响因子: 10.5
作者:
Pondaven,P;Meijer,L;Beach,D
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DOI: --
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期刊: Archives d'anatomie microscopique et de morphologie experimentale
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